Panel 13 FD Agenda page 1

Transcription

1 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: AGENDA NEC Code-Making Panel 13 First Draft Meeting January 12-17, 2015 Hilton Head, SC Item No. Subject Call to Order Introduction of Members and Guests Approval of A2013 ROC Meeting Minutes Review of Meeting Procedures and Revision Schedule Comments/Questions from Committee Members Task Group Reports Processing of Public Inputs Fire Protection Research Foundation Requests Old Business New Business Adjournment Panel 13 FD Agenda page 1

2 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: NEC CODE-MAKING PANEL 13 ROC Meeting Minutes 1. List date(s) and location of meeting: November , 2012; Crowne Plaza Hotel, Redondo Beach, CA. 2. List names of TC members and guests in attendance (or attach sign-in sheets): See attached 3. List names of guests addressing the Panel (if any), the subject of their address, and the length of time they spoke: Elaine Thompson: protection of conductors in concrete (1 minute) Stephen McLuer: responded to questions from CMP 13 concerning various comments that he submitted (5 minutes) Michael Anthony/Robert Schuerger: presentation on critical operating power systems (COPS) (10 minutes) John Loud: presentation on use of GFCIs on portable generators (10 minutes) James Jongkind: presentation on use of GFCIs on portable generators (10 minutes) 4. Number of public proposals acted upon: Number of Panel generated proposals: 5 6. If applicable, list the appointment of any Task Groups that will be working on any Panel subject subsequent to the Panel Meeting, along with the names of the members of the Task Group(s). The following individuals are recommended for appointment to the task group that is being formed in accordance with the direction of the TCC in Comment 13-63: Mark Ode Mario Spina Dan Neeser Chad Kennedy John Kovacik 7. If applicable, list any request(s) contained in a Panel Statement that requires Technical Correlating Committee attention: NONE (see panel actions for Hold items) 8. If applicable, list any Panel Actions that, in your opinion, should to be referred to another Panel(s) for correlation: NONE 9. List any Proposals that should be referred to the Toxicity Advisory Committee: Panel 13 FD Agenda page 2

3 NONE 10. Identify any issues that should be brought to the attention of the NFPA Research Foundation for their input and assistance: CMP 13 recommends the following two research projects: 1) CMP 13 continues to struggle with the requirements for the use of concrete as a method to protect wiring [695.6(A)(2)(d); (F); (D)(1)(5); (C)]. The panel recommends that a research project be commissioned to determine the fire resistance ratings and heat transfer properties of concrete enclosures of various dimensions, as well as the performance of various wiring methods inside those enclosures during fire conditions. 2) CMP 13 recommends the establishment of a research project to collect data and lessons learned from the impact of Hurricane/Superstorm Sandy that could be the basis for future code changes. Examples of information that could be gathered include, but are not limited to: The performance of standby power supplies, including generators, transfer switches, batteries, etc. and the reasons for any failures The performance of critical operating power systems (COPS) Vulnerabilities and failure points that have not previously been addressed or considered in code requirements, risk assessments or emergency planning This research project could be coordinating with other technical committees, such as NFPA 110 and NFPA List all Proposals related to combustibles in plenums or other air handling spaces: NONE 12. List any general Panel requests for information or assistance from the Technical Correlating Committee: NONE 13. List any additional information that you feel would be helpful to the Technical Correlating Committee, Staff, or to the process in general: NONE 14. Were any units of measure "Accepted" by the panel that are not listed in Annex C of the NEC Style Manual? If so, please list the section number(s) and proposal number(s) below: NONE Donald P. Bliss Name (Please Print) November 30, 2012 Date Panel 13 FD Agenda page 3

4 Panel PI's Inlcude file Title Section none Public Input No Physical Damage all none Public Input No Actual volts all none Public Input No various global editorial all none Public Input No V DC all none Public Input No.4329 All Definitions all A Public Input No Nominal all Panel A Public Input No.307 Previous Hold 13 Public Input No.313 Previous Hold 13 A Public Input No.316 Previous Hold 13 A Public Input No.336 Previous Hold 4 AND 13 A Public Input No.335 Previous Hold 4 AND 13 A Public Input No.306 Previous Hold 4 AND 13 none Public Input No Alternate Source (of Power) New 13 none Public Input No , generator, generator set new 13 none Public Input No , Primary Power Source 13 none Public Input No.3236 Article A Public Input No NFPA Section after none Public Input No.3419 Section No none Public Input No.1527 Section No none Public Input No NFPA Section No none Public Input No.500 Section No none Public Input No.3015 Section No none Public Input No.194 Section No CI Public Input No NFPA Section No none Public Input No.2060 Section No (C) 13 none Public Input No.4192 Section No Panel 13 FD Agenda page 4

5 Panel PI's none Public Input No.3411 Section No none Public Input No.2061 Section No none Public Input No.2924 Section No A Public Input No.2893 Section No none Public Input No.1681 Section No none Public Input No.1515 Section No none Public Input No.1382 Section No PI No none Public Input No.4194 Section No none Public Input No.4122 Section No none Public Input No.2572 Section No Public Input No.22 NFPA Section No none Public Input No NFPA Section No none Public Input No none Public Input No none Public Input No.1672 Section No none Public Input No.2678 Section No none Public Input No.1678 Section No (A) [Excluding any Sub Sections] 13 none Public Input No.1679 Section No (A) 13 none Public Input No.1675 Section No (A)(1) 13 none Public Input No.1676 Section No (A)(2) 13 none Public Input No.1680 Section No none Public Input No.1673 Section No (A) 13 none Public Input No.3744 Section No none Public Input No.3502 Section No none Public Input No.3550 Section after none Public Input No.2586 Section No (A) 13 none Public Input No.2625 Section No (C) 13 none Public Input No.3267 Section after none Public Input No.302 Section after none Public Input No.3349 Sections 480.5, none Public Input No.685 Section No (A) 13 Panel 13 FD Agenda page 5

6 Panel PI's none Public Input No.2630 Section No (A) 13 none Public Input No NFPA Section No (B) 13 none Public Input No.2634 Section No (D) 13 none Public Input No.2637 Section No none Public Input No.2064 Section No none Public Input No.1570 Section No none Public Input No.2642 Section No (A) 13 none Public Input No.2647 Section No (B) 13 none Public Input No.2648 Section No (A) 13 none Public Input No.3270 Section No (B) 13 none Public Input No.2649 Section No (D) 13 none Public Input No.912 Section No (E) 13 none Public Input No.2674 Section No (A) 13 none Public Input No.2694 Section No (B) 13 none Public Input No.2772 Section No (B) 13 none Public Input No NFPA Section No [Excluding any Sub Sections] 13 none Public Input No.2933 Section No none Public Input No.1359 Section after 695.3(2) 13 none Public Input No NFPA Section No (C) 13 none Public Input No.266 Section No (C) [Excluding any Sub Sections] 13 none Public Input No.267 Section No (C)(1) 13 none Public Input No.268 Section No (C)(2) 13 none Public Input No.2825 Section after 695.3(D) 13 none Public Input No.950 Section No (A) 13 none Public Input No NFPA Section No (B)(3) 13 none Public Input No.3326 Section No (C)(2) 13 none Public Input No.265 Section No (A)(2) 13 A Public Input No NFPA Section No (A)(2) 13 none Public Input No.667 Section No (D) 13 none Public Input No.3435 Section No (J) 13 none Public Input No.3068 Section No none Public Input No.668 Section No (E) 13 none Public Input No.1360 Section No (E) 13 Panel 13 FD Agenda page 6

7 Panel PI's none Public Input No.2789 Section No (F) 13 none Public Input No.2579 Section after (F) 13 none Public Input No.3572 Section No none Public Input No.3496 Section No none Public Input No.3359 Section No none Public Input No , Emergency Systems. 13 none Public Input No , Emergency Systems. 13 none Public Input No.754 Section No none Public Input No.753 Section No none Public Input No NFPA Section No none Public Input No.669 Section after none Public Input No.1001 Section after none Public Input No.2750 Section No (C) 13 none Public Input No.3005 Section after 700.3(E) 13 none Public Input No NFPA Section No none Public Input No.420 Section No (A) 13 none Public Input No NFPA Section No (A) 13 none Public Input No.3376 Section No (B) 13 none Public Input No.3006 Section No (B) 13 none Public Input No NFPA Section after 700.4(B) 13 none Public Input No.95 Section No (A) 13 none Public Input No.951 Section No (C) 13 none Public Input No.1549 Section No (C) 13 none Public Input No.3018 Section No (A) 13 none Public Input No.3888 Section No (A) 13 none Public Input No.1484 Section No (A) 13 none Public Input No.3334 Section No none Public Input No.2659 Section No (A) 13 none Public Input No.2656 Section No (A) 13 none Public Input No.2415 Section No (A) 13 none Public Input No.2411 Section No (A) 13 none Public Input No.3296 Section No (B) 13 none Public Input No.104 Section No (B) 13 Panel 13 FD Agenda page 7

8 Panel PI's none Public Input No NFPA Section No (B) 13 none Public Input No NFPA Section No (B) 13 none Public Input No.2985 Section No (C) 13 none Public Input No.3895 Section No (D) [Excluding any Sub Sections] 13 none Public Input No.2564 Section No (D) [Excluding any Sub Sections] 13 none Public Input No.144 Section No (D) [Excluding any Sub Sections] 13 none Public Input No.1246 Section No (D) [Excluding any Sub Sections] 13 A Public Input No NFPA Section No (D)(1) 13 none Public Input No.1632 Section No (D)(2) 13 none Public Input No.2797 Section No (D)(3) 13 none Public Input No.880 Section No [Excluding any Sub Sections] 13 none Public Input No.3909 Section No [Excluding any Sub Sections] 13 none Public Input No.2936 Section No [Excluding any Sub Sections] 13 none Public Input No.2824 Section No [Excluding any Sub Sections] 13 none Public Input No.2238 Section No [Excluding any Sub Sections] 13 none Public Input No.2752 Section No (A) 13 none Public Input No.274 Section No (B)(6) 13 A Public Input No.2816 Section after (B) 13 none Public Input No.624 Section No (F)(2) 13 none Public Input No.2753 Section No (F)(2) 13 NR Public Input No.2373 Section No (F)(2) 13 none Public Input No.1008 Section No (F)(2) 13 none Public Input No.697 Section No none Public Input No.1000 Section No none Public Input No.1259 Section No none Public Input No.971 Section No none Public Input No.752 Section after none Public Input No.1507 Section No A Public Input No.3912 Section No none Public Input No.3766 Section No none Public Input No NFPA Section No none Public Input No.3575 Section No none Public Input No.670 Section after Panel 13 FD Agenda page 8

9 Panel PI's none Public Input No.3273 Section No (C) 13 none Public Input No.590 Section No none Public Input No.1550 Section No (C) 13 none Public Input No.3020 Section No (A) 13 none Public Input No.2281 Section No (D) 13 none Public Input No NFPA Section No (A) 13 A Public Input No.2815 Section after none Public Input No.2754 Section No (A) 13 none Public Input No.2755 Section No (G) 13 none Public Input No.1509 Section No none Public Input No.3769 Section No none Public Input No NFPA Section No none Public Input No NFPA Section No (B)(1) 13 none Public Input No.1586 Section No (B)(2) 13 none Public Input No.3250 Section after 702.4(B)(2) 13 none Public Input No.1668 Section No none Public Input No NFPA Section No none Public Input No.3037 Section No none Public Input No.2751 Section after none Public Input No.3971 Section No none Public Input No NFPA Section No (A) 13 none Public Input No.2810 Section No (C) 13 A Public Input No.2813 Section after none Public Input No NFPA Section No (B) 13 none Public Input No.2807 Section No none Public Input No NFPA Section after (A) 13 none Public Input No.3501 Section No (A) 13 none Public Input No NFPA Section No (A) 13 none Public Input No.3589 Section after (A) 13 NR Public Input No.4276 Article 706 Energy Storage Systems New 13 NR Public Input No.4219 Article 706 Version 2+C Panel 13 FD Agenda page 9

10 Panel PI's none Public Input No NFPA Section No none Public Input No.2434 Section No (A)(1) 13 none Public Input No.2433 Section No (A)(2) 13 none Public Input No.146 Section No (C)(1) 13 none Public Input No NFPA Section No (C)(1) 13 A Public Input No NFPA Section No (C)(2) 13 none Public Input No.3259 Section No (C)(3) 13 none Public Input No.2282 Section No none Public Input No.1802 Section No none Public Input No.2756 Section No (E) 13 none Public Input No.3046 Sections (F)(5), (F)(6) 13 none Public Input No.3213 Section No (B) 13 none Public Input No.2283 Section No (B) 13 none Public Input No.3773 Section No A Public Input No Article 710 Microgrids New 13 A Public Input No Article 712 DC Microgrids New 13 none Public Input No Annex F 13 none Public Input No Annex F 13 Panel 13 FD Agenda page 10

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12 Page 1 of 1 11/20/2014 Public Input No NFPA [ Global Input ] Change "physical damage" to "mechanical damage" The term "physical damage" is often a source of confusion. One of the points of confusion is what is included in "physical damage"; for example, is exposure to corrosive gas included? I believe other language in the code covers that type of situation, and "mechanical damage" more clearly reflects the intent of the requirements in the NEC that currently refer to "physical damage". Submitter Full Name: Christel Hunter Organization: General Cable Submittal Date: Mon Sep 22 20:02:13 EDT 2014 Copyright Assignment I, Christel Hunter, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Christel Hunter, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 12

13 Page 1 of 2 Public Input No NFPA [ Global Input ] Search for Replace with 50 volts 50 actual volts 50 Volts 50 Actual Volts 50-volts 50-actual-volts 50-Volts 50-Actual-Volts Search for 150 volts 150 actual volts 150 Volts 150 Actual Volts 150-volts 150-Volts Search for 150-actual-volts 150-Actual-Volts 300 volts 300 actual volts 300 Volts 300 Actual Volts 300-volts 300-Volts Search for 300-actual-volts 300-Actual Volts 2000 volts 2000 actual volts 2000 Volts 2000 Actual Volts Search for 2001 volts 2001 actual volts 2001 Volts 2001 Actual Volts Search for 5000 volts 5000 actual volts 5000 Volts 5000 Actual Volts Search for 35,000 volts 35,000 actual volts 35,000 Volts 35,000 Actual Volts Replace with Replace with Replace with Replace with Replace with Replace with 35,000 V 35,000 Actual V These search and replace operations will pick up all references to the listed voltages, alll of which are actual rather than nominal values. This section uses voltages that are "actual" hard limits. Refer to the substantiation for 1902 for more information. Related Public Inputs for This Document Panel 13 FD Agenda page /20/2014

14 Page 2 of 2 11/20/2014 Related Input Public Input No NFPA [Global Input] Relationship This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Wed Oct 15 19:51:34 EDT 2014 Copyright Assignment I, JAMES WILLIAMS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am JAMES WILLIAMS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 14

15 Page 1 of 1 11/20/2014 Public Input No NFPA [ Global Input ] for "provided that the" read "if the" for "provided that it" read "if it" for "provided that all" read "if all" for "provided that such" read "if the" NEC_StyleManual_2011.pdf: Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic. The following are examples of old-fashioned expressions and word uses that shall not be permitted: "provided that" Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Tue Nov 04 10:33:19 EST 2014 Copyright Assignment I, JAMES WILLIAMS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am JAMES WILLIAMS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 15

16 Page 1 of 2 Public Input No NFPA [ Global Input ] Change the use of the phrase "60 V DC" to "Nominal 50V DC" throughout the NFPA 70 Standard. The NEC is conflicted in its use of the terminology which defines the DC voltage level on when certain code rules apply. It would appear that half of the NEC code sections refer to 60V dc as the voltage limit which mandates certain code requirements. And it would appear the other half refers to "50V DC". The code should be consistent in its approach. This public input seeks to resolve this conflict and come up with consistent terminology throughout the code. In (A)(1)(b) working space requirements are for 60V DC refers to 60V DC for grounding requirements for DC systems refers to listing requirements for certain DC equipment at 60V (D) refers to elevator requirements for uninsulated parts at no more than 60V DC. Article 640 and 647 have similar DC voltage limits. For the 50 volt level guarding of live parts in refers to both AC and DC systems refers to marking of conductors at 50 volts or less regardless of voltage type. Article 720 refers to systems at 50 volts or less whether DC or AC (C)(2) refers to marking of conductors for DC systems 50V or less (C)(2) refers to identification of DC feeder conductors at 50V or less. Section states that overcurrent protection shall not be required for conductors from a battery with a nominal voltage of 50 volts or less refers to DC storage batteries that operate at a voltage of 50 volts, nominal or less. There are many other codes sections not mentioned which vary back and forth between 50 and 60V. The code is not consistent. I am recommending that globally the term 60V DC be replaced with 50V nominal DC. Submitter Full Name: Lawrence Ayer Organization: Biz Com Electric, Inc. Affilliation: Independent Electrical Contractors, Inc. Submittal Date: Tue Nov 04 21:18:12 EST 2014 Copyright Assignment I, Lawrence Ayer, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. Panel 13 FD Agenda page /20/2014

17 Page 1 of 2 Public Input No NFPA [ Global Input ] Move all definitions to Article 100. It seems that every cycle definitions are moved from a.2 section within an Article to Article 100 because someone points out that the particular term is used in more than one Article. For NEC users, especially new ones it makes understanding the rules that much more difficult. We also have examples like Dustight that is defined differently in Article 100 as compared to That creates confusion. A greater problem is when a term is defined within an Article yet the term is used elsewhere in the NEC. Is the term in the Article without it being defined supposed to be something different or can it be used the same way? That also creates confusion. Some examples include Metal wireway which is defined in yet the term is used elsewhere such as in Articles 210, 225, etc. A Tap conductor is defined in 240.2, is a motor tap conductor supposed to be something different in Article 430? As stated in the NEC Style Manual definitions cannot contain requirements yet it is often argued that stating that something is or is not does not necessarily constitute a requirement. If it is not, then it doesn't meet the definition. If the term is used in multiple articles then creating a definition that is usable in all those Articles is the best approach. Specific requirements which can be different can still be placed in each Article Many other standards have all definitions in one location. Constancy will be improved by having the panels develop language that will use the same terms without creating unnecessary conflicts. I understand the Correlating Committee recently agreed to leave terms in the.2 Section of Articles. I respectfully ask them to reconsider that position. It seems that every cycle definitions are moved from a.2 section within an Article to Article 100 because someone points out that the particular term is used in more than one Article. For NEC users, especially new ones it makes understanding the rules that much more difficult. We also have examples like Dustight that is defined differently in Article 100 as compared to That creates confusion. A greater problem is when a term is defined within an Article yet the term is used elsewhere in the NEC. Is the term in the Article without it being defined supposed to be something different or can it be used the same way? That also creates confusion. Some examples include Metal wireway which is defined in yet the term is used elsewhere such as in Articles 210, 225, etc. A Tap conductor is defined in 240.2, is a motor tap conductor supposed to be something different in Article 430? As stated in the NEC Style Manual definitions cannot contain requirements yet it is often argued that stating that something is or is not does not necessarily constitute a requirement. If it is not, then it doesn't meet the definition. If the term is used in multiple articles then creating a definition that is usable in all those Articles is the best approach. Specific requirements which can be different can still be placed in each Article Many other standards have all definitions in one location. Constancy will be improved by having the panels develop language that will use the same terms without creating unnecessary conflicts. I understand the Correlating Committee recently agreed to leave terms in the.2 Section of Articles. I respectfully ask them to reconsider that position. Panel 13 FD Agenda page /20/2014

18 Page 2 of 2 11/20/2014 Submitter Full Name: Paul Dobrowsky Organization: Self Submittal Date: Thu Nov 06 19:36:47 EST 2014 Copyright Assignment I, Paul Dobrowsky, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Paul Dobrowsky, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 18

19 Page 2 of 14 Globally edit the text by removing the following text strings nominal Nominal, nominal, Nominal nominal, Nominal,, nominal,, Nominal, That is, remove the word nominal and any optional commas preceding or following it. This is a little too broad, I will provide additional submissions that repair "collateral damage" to nominals not related to voltage. Substantiation: The NEC contains 2744 sentences that contain volt, voltage, and V. Some of the V are false positives (part V, Volume...). 317 sentences contain nominal. The use of the word nominal does not appear to have a particular pattern when it is found in connection to voltage. Having some voltages marked as nominal and others not marked when both are intended to be nominal, leads to confusion Making it clear what a particular voltage reference meains is important. Some of the voltage references are for exact voltages. This is true for most "limit" specifications such as "the voltage shall not exceed 42.4 volts". Other voltages are nominal and refer to a range of voltages. The specification of 600 volts, which is a utilization voltage, and 1000 volts, which is the "new" 600 volts, is problematical. I have chosen to treat these references as nominal. I propose that the NEC indicate that all voltages listed in it are nominal, unless specifically marked actual This would rid the document of uncertainty as to whether or not a given voltage specification was actual or nominal. Also add a table that indicates that the three groups of nominal voltages refer to the same thing: for instance 125/250 device rating, 120/240 load rating, and 115/230 motor rating. Coordination: These changes need to be co-ordinated with other submissions These submission will be keyed back to this submission number (1902). They include defining Actual Voltage and adding actual where appropriate. (1) nominal for battery circuits (2) nominal for 120/60 cneter grounded AC circuits (3) Nearly always nominal (4) Occasionally nominal (5) nominal in 600 Voltages references in NEC Panel 13 FD Agenda page /20/2014

20 Page 3 of 14 Actual (exact) <-- nominal (utilization) (4) / (1) (5) Y/ (2) Y/ Y/ (3) Additional Proposed Changes File Name Description Approved NFPA-9102_libreOffice.pdf table for substantiation Panel 13 FD Agenda page /20/2014

21 Page 4 of 14 The NEC contains 2744 sentences that contain volt, voltage, and V. Some of the V are false positives (part V, Volume...). 317 sentences contain nominal. The use of the word nominal does not appear to have a particular pattern when it is found in connection to voltage. Having some voltages marked as nominal and others not marked when both are intended to be nominal, leads to confusion ALL RELATED submissions link back to this (1902). Although other related submissions may be interrelated, such links would grow exponentially (the mathematical exponentially, not the TV news exponentially) Making it clear what a particular voltage reference meains is important. Some of the voltage references are for exact voltages. This is true for most "limit" specifications such as "the voltage shall not exceed 42.4 volts". Other voltages are nominal and refer to a range of voltages. The specification of 600 volts, which is a utilization voltage, and 1000 volts, which is the "new" 600 volts, is problematical. I have chosen to treat these references as nominal. I propose that the NEC indicate that all voltages listed in it are nominal, unless specifically marked actual This would rid the document of uncertainty as to whether or not a given voltage specification was actual or nominal. Also add a table that indicates that the three groups of nominal voltages refer to the same thing: for instance 125/250 device rating, 120/240 load rating, and 115/230 motor rating. Coordination: These changes need to be co-ordinated with other submissions These submission will be keyed back to this submission number (1902). They include defining Actual Voltage and adding actual where appropriate. (1)nominal for battery circuits (2)nominal for 120/60 center grounded AC circuits (3)Nearly always nominal (4)Occasionally nominal (5)nominal in 600 {{table formatting was lost when copying it in}}} Actual (exact) <-- nominal (utilization) <-- Voltages references in NEC (4) / (1) (5) Y/ (5) (2) Y/277 Panel 13 FD Agenda page /20/2014

22 Voltages found in NEC Actual (Exact) Nominal (Utilization) (4) / (1) (5) Y/ (5) (2) Y/ Y/ (3) (1)Nominal for battery circuits (2)Nominal for 120/60 center grounded AC circuits (3)Nearly always nominal (4)Occasionally nominal (5)Nominal in 600 Panel 13 FD Agenda page 22

23 Page 14 of 14 11/20/2014 Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] Public Input No NFPA [Section No. Table] This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Wed Oct 15 11:34:29 EDT 2014 Copyright Assignment I, JAMES WILLIAMS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am JAMES WILLIAMS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 23

24 Panel 13 FD Agenda page 24

25 6 of /24/ :59 PM Public Input No. 307-NFPA [ Global Input ] NOTE: The following Public Input appeared as Hold (Rejected but held) in Public Comment No (Log #856) of the A2013 ROC (Second Draft Report) for NFPA 70 and per the Regs. at The Correlating Committee directs that the items identified in the panel action be reported as "Hold" per the panel action. Additional Proposed Changes File Name Description Approved pdf P13-36.pdf P13-36 See the Uploaded File for the Recommendation text. Substantiation: The panel rejected the original proposal because it lacked technical substantiation to require a calculation for dc fault current. The text is revised and additional bullets are provided to match the manual of style. The revised text correlates with other sections of the Code : The word nominal is added to be consistent with and to clarify that battery voltages are charged within a range that can exceed 50 volts (A): We support the explanations of negative ballots by Little and Spina. For safety purposes, the disconnecting means must be as close as reasonably possible to the terminals of the battery (where the voltage and short circuit current is at its highest). Within sight could allow a disconnect to be as far as 50 feet away from the battery terminals, thereby creating an unnecessary hazard. Conversely, while it may be theoretically possible to put the disconnect only inches away from the terminal, such practice is seldom reasonable and prudent. The term as close as practicable satisfies both issues. The term as close as practicable is used elsewhere in the NEC and is added to the requirement for the disconnecting means to be within sight of the battery. This proposed revision correlates with the present requirement in (H), which requires overcurrent protection to be installed as close as practicable to the battery terminals. The intent of 480.5(A) is to identify the hazard potential precisely at the point of maximum arc flash potential at the battery terminals and the adjacent battery disconnect. Because the value will change depending upon where the measurement is taken, the Code needs to specify where the calculation is to be determined. Regarding the deletion of the word system we note that, by Article 480 s own definition, a battery system encompasses Interconnected battery subsystems consisting of one or more storage batteries and battery chargers, and can include inverters, converters, and associated electrical equipment. The word system is too vague, so it is replaced with the word terminals to harmonize with (H) and to precisely identify where the disconnecting means should be located (B): Article 645 requires remote activation for battery disconnects serving ITE rooms. The disconnect serving an ITE room must be capable of being locked open to prevent the remote actuation from occurring when it will jeopardize safety of personnel. The text is similar to that used elsewhere in the Code, such as in (C): The text is modified to correlate with section An editorial change puts the requirements in bullet form per the manual of style. The purpose of posting the battery short circuit current in bullet (1) is to allow maintenance personnel to determine the required PPE by using the guidance provided in NFPA 70E. Annex D.8 in NFPA 70E provides guidance for the user to calculate the arcing current from the system bolted fault current. NFPA 70E Table 130.7(c)(15)(b) provides the recommend PPE provided that the user can determine the arcing current. If the system bolted fault current is not provided, it is unlikely that a worker will have the ability to determine the arcing current, thereby making Table 130.7(c)(15)(b) useless to the people who really need it. The present requirement for labeling of ac equipment already allows field technicians to determine PPE from the ac tables (see Table 130.7(c)(15)(a)). This text for dc-output batteries is consistent with the requirements for ac equipment. We note that proposals have been submitted to NPFA 70E that will likely change Table 130.7(c)(15)(b) to be based on system bolted fault current only, thereby making the text in 480.4(C) even more useful. Panel 13 FD Agenda page 25

26 Report on Comments June 2013 NFPA Log #856 NEC-P13 Final Action: Accept in Principle in Part (480.5(A) and (B)) TCC Action: The Correlating Committee directs that the items identified in the panel action be reported as "Hold" per the panel action. Submitter: Stephen McCluer, Schneider Electric / Rep. IEEE Stationary Battery Committee Comment on Proposal No: Recommendation: Accept the proposed text in principle with the following revisions: Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system over nominal 50 volts. (A) Accessibility A The disconnecting means shall be readily accessible to qualified personnel for inspection and maintenance and shall be located as close as practicable and within sight of the battery system terminals. (B) Remote Operation Where controls to activate the disconnecting means of a battery are located in a remote location, the disconnecting means shall be lockable in the open position and the location of the controls shall be field marked on the disconnecting means. (B)(C) Field Marking. The disconnecting means shall be legibly marked in the field in accordance with the nominal battery system voltage and maximum available fault current derived from the stationary battery system., The field marking(s) shall: (1) include the nominal battery voltage and the maximum available short circuit current derived from the stationary battery; INFORMATIONAL NOTE: NFPA 70E-2012 states in Annex D-8 that the value to be used for calculating maximum direct current incident energy is the bolted fault current in amperes, which is the same as the battery short circuit current. Short circuit current is the term generally used within the battery industry. The short circuit current values for individual cells or units can be obtained from the battery manufacturer. (2) be calculated at the terminals of the battery where the arc flash potential is highest; (3) be determined by the owner or owner s agent responsible for the battery installation; (4) include the date the fault current calculation was performed; and (5) be of sufficient durability to withstand the environment involved. (D) Modifications. When modifications to the electrical installation occur that affect the maximum available fault current, the maximum available fault current shall be verified or recalculated as necessary to ensure the necessary updates are made to reflect new available fault current at the terminals of the battery. Substantiation: The panel rejected the original proposal because it lacked technical substantiation to require a calculation for dc fault current. The text is revised and additional bullets are provided to match the manual of style. The revised text correlates with other sections of the Code : The word nominal is added to be consistent with and to clarify that battery voltages are charged within a range that can exceed 50 volts (A): We support the explanations of negative ballots by Little and Spina. For safety purposes, the disconnecting means must be as close as reasonably possible to the terminals of the battery (where the voltage and short circuit current is at its highest). Within sight could allow a disconnect to be as far as 50 feet away from the battery terminals, thereby creating an unnecessary hazard. Conversely, while it may be theoretically possible to put the disconnect only inches away from the terminal, such practice is seldom reasonable and prudent. The term as close as practicable satisfies both issues. The term as close as practicable is used elsewhere in the NEC and is added to the requirement for the disconnecting means to be within sight of the battery. This proposed revision correlates with the present requirement in (H), which requires overcurrent protection to be installed as close as practicable to the battery terminals. The intent of 480.5(A) is to identify the hazard potential precisely at the point of maximum arc flash potential at the battery terminals and the adjacent battery disconnect. Because the value will change depending upon where the measurement is taken, the Code needs to specify where the calculation is to be determined. Regarding the deletion of the word system we note that, by Article 480 s own definition, a battery system encompasses Interconnected battery subsystems consisting of one or more storage batteries and battery chargers, and can include inverters, converters, and associated electrical equipment. The word system is too vague, so it is replaced with the word terminals to harmonize with (H) and to precisely identify where the disconnecting means should be located (B): Article 645 requires remote activation for battery disconnects serving ITE rooms. The disconnect serving an ITE room must be capable of being locked open to prevent the remote actuation from occurring when it will jeopardize Printed on 2/26/2014 1

27 Report on Comments June 2013 NFPA 70 safety of personnel. The text is similar to that used elsewhere in the Code, such as in (C): The text is modified to correlate with section An editorial change puts the requirements in bullet form per the manual of style. The purpose of posting the battery short circuit current in bullet (1) is to allow maintenance personnel to determine the required PPE by using the guidance provided in NFPA 70E. Annex D.8 in NFPA 70E provides guidance for the user to calculate the arcing current from the system bolted fault current. NFPA 70E Table 130.7(c)(15)(b) provides the recommend PPE provided that the user can determine the arcing current. If the system bolted fault current is not provided, it is unlikely that a worker will have the ability to determine the arcing current, thereby making Table 130.7(c)(15)(b) useless to the people who really need it. The present requirement for labeling of ac equipment already allows field technicians to determine PPE from the ac tables (see Table 130.7(c)(15)(a)). This text for dc-output batteries is consistent with the requirements for ac equipment. We note that proposals have been submitted to NPFA 70E that will likely change Table 130.7(c)(15)(b) to be based on system bolted fault current only, thereby making the text in 480.4(C) even more useful. Short circuit on individual cells or units can be obtained from the battery manufacturer. However, the short-circuit current of an entire battery must factor in such things as the number of cells, line impedance within intercell and intertier connectors and other conductors, cable length, parallel battery strings, etc. Bullet (3) stipulates that such calculations are to be performed by the owner or owner s agent who is ultimately responsible for the system/installation design. This is consistent with equipment marking requirements in NFPA 70E. An informational note is added to 480.5(C)(1) to clarify possible confusion over terms. In this context, the battery s bolted fault current and battery short circuit current are synonymous. Short circuit current is the term used and the value that will be provided by battery manufacturers (D): Text is necessary to explain what needs to be done when equipment is modified. The text correlates with , but it clarifies that the value is to be calculated for the potential at the battery terminals and no place else. This is not original material; its reference/source is as follows: This comment was developed by the following members of the IEEE Stationary Battery Committee: Stephen McCluer/Schneider Electric (user/integrator); Phyllis Archer/C&D Technologies (manufacturer); Curtis Ashton/Century Link (telecommunications user); Allen Byrne/Interstate Powercare (vendor & service) Bill Cantor/TPI (engineering firm); Terry Chapman/SCE (utility user) ; Ron Marts/Telcordia (standards development organization); Dan McMenamin/DMI (engineering firm), and Daleep Mohla (engineering firm). Panel Meeting Action: Accept in Principle in Part CMP-13 accepts in principle: The concept of "nominal" voltage in the first sentence of 480.5; The concepts of "readily accessible" and "within sight" in 480.5(A); And 480.5(B) CMP-13 Holds the following new material: The phrase to qualified personnel for inspection and maintenance in 480.5(A); 480.5(C)(1), Informational Note 480.5(C)(2); 480.5(C)(3); And 480.5(D) CMP-13 Rejects the reference to in 480.5(C) CMP-13 Accepts in Principle language providing requirements for field marking of the disconnecting means including: Voltage, Fault current, date of the calculation, and durability to withstand the environment. For clarity and to correlate with action on Comment revise 480.5(D) as follows: (D) Notification. The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the battery if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include: (1) the nominal battery voltage (2) the maximum available short circuit current derived from the stationary battery system, and (3) the date the calculation was performed. Informational Note: Battery equipment suppliers can provide information about short circuit current on any particular battery model. Panel Statement: The concepts of remote operation, "nominal" volts, "readily accessible" and "within sight" are Printed on 2/26/2014 2

28 Report on Comments June 2013 NFPA 70 accepted in principle in the panel action on comment CMP-13 accepts in principle the requirements for field marking but modifies the language to incorporate the changes into text accepted by Comment CMP-13 holds new material that has not had the opportunity for public review. CMP-13 rejects the reference to in 480.5(C) since gives field marking requirements for service equipment. Number Eligible to Vote: 21 Ballot Results: Affirmative: 21 Comment on Affirmative: LITTLE, L.: We are voting affirmative on the panel action to Accept in Principle in Part comment It is important to note for the Correlating Committee and the public that this action clarifies the final text for 480.5(D). See our affirmative statement on comment Printed on 2/26/2014 3

29 Report on Proposals June 2013 NFPA Log #1076 NEC-P13 Final Action: Reject (480.5(A) and (B) (New) ) Submitter: Daleep C. Mohla, DCM Electrical Consulting Services, Inc. Recommendation: Revise text to read as follows: Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system over 50 volts. (A) The disconnecting means shall be readily accessible and located within sight as close as practicable of the battery system terminals. (B) Field Marking. The disconnecting means shall be legibly marked in the field with the nominal battery system voltage and maximum available fault current derived from the stationary battery system. The field marking(s) shall include the date the fault current calculation was performed and be of sufficient durability to withstand the environment involved. Substantiation: Within sight is defined in Article 100 as the specified equipment is to be visible and not more than 15 m (50 ft) distant from the other. Battery system disconnect should be as close a s practicable in ( H) for quick isolation of battery from other sources such as battery chargers etc. NFPA 70E has requirements for needed personal protective equipment (PPE) while working on Direct Current systems. Information on maximum available fault current available from the battery system is required to select the required PPE. Panel Meeting Action: Reject Panel Statement: For the recommendation in (A), requiring the disconnecting means for ungrounded battery conductors to be as close as practicable is too arbitrary and almost unenforceable. The disconnecting means and the cabling or raceway must be installed before the electrical inspector visits the site for an inspection. The inspector must then make a decision on whether the disconnecting means is as close as practicable, and, if not, then the entire installation would have to be redone. The existing text is much more reasonable and workable. For the recommendation in (B), the submitter has provided no technical substantiation to require a calculation for dc fault current. Number Eligible to Vote: 18 Ballot Results: Affirmative: 16 Negative: 2 Explanation of Negative: LITTLE, L.: The proposed revision to require that the disconnecting means be installed "as close as practicable" is enforceable. The term "practicable" with reference to distance is used throughout the NEC and has been enforced by AHJs for decades. This proposed revision mirrors the present requirement in (H), which requires overcurrent protection to be installed as "close as practicable" to the battery terminals. SPINA, M.: A) (H) permits overcurrent protection for battery conductors to be installed as close as practicable. Inclusion of a similar statement here would harmonize the requirements. B) NFPA 70E-2012 Table 130.7(C)(15)(b) Hazard/Risk Category Classifications and Use of Rubber Insulating Gloves and Insulated and Insulating Hand Tools Direct Current Equipment requires determining the available arcing current to select PPE necessary for protection of employees. he arcing current depends on the maximum short circuit from battery system. Without knowing what the available short current is, employees have no way of selecting required PPE for protection from the arc flash hazard. The only way to determine the maximum short circuit available from the battery is from the manufacturer. The optimum time to obtain this value is during the initial installation. Without this information, proper sizing of disconnect switch may not be feasible. This requirement for posting of short circuit current for batteries is similar to the requirements in for service equipment to comply with and Printed on 2/27/2014 1

30 7 of /24/ :59 PM Short circuit on individual cells or units can be obtained from the battery manufacturer. However, the short-circuit current of an entire battery must factor in such things as the number of cells, line impedance within intercell and intertier connectors and other conductors, cable length, parallel battery strings, etc. Bullet (3) stipulates that such calculations are to be performed by the owner or owner s agent who is ultimately responsible for the system/installation design. This is consistent with equipment marking requirements in NFPA 70E. An informational note is added to 480.5(C)(1) to clarify possible confusion over terms. In this context, the battery s bolted fault current and battery short circuit current are synonymous. Short circuit current is the term used and the value that will be provided by battery manufacturers (D): Text is necessary to explain what needs to be done when equipment is modified. The text correlates with , but it clarifies that the value is to be calculated for the potential at the battery terminals and no place else. Submitter Full Name: CC on NEC-AAC Organization: CC on National Electrical Code Submittal Date: Wed Feb 26 09:55:09 EST 2014 Panel 13 FD Agenda page 26

31 7 of /24/ :59 PM Public Input No. 316-NFPA [ Global Input ] NOTE: The following Public Input appeared as Hold (Rejected but held) in Public Comment No (Log #290) of the A2013 ROC (Second Draft Report) for NFPA 70 and per the Regs. at The Correlating Committee directs that the the items referenced in panel action be reported as "Hold." Additional Proposed Changes File Name Description Approved pdf P13-55a.pdf P13-55a See the Uploaded File for the Recommendation text. Substantiation: NEMA Proposal 13-55a was to commensurate changes in NEC 695 as extracted from revised NFPA 20 (2013), (aka Fig. A.10.8 ARRANGEMENT II). One of the changes was that the CB contained in the upstream ATS Assembly (being an upstream disconnect) was NOT to count against the quota (of 1 max) established in NFPA 20, That statement did not get included in 13-55a as proposed, but should have. The intent is to have the Upstream ATS Assembly comply with Article 230, using a THERMAL-MAGNETIC CB, since it needs most often to be SUSE rated. Proposal 13-55a purports to permit the use of an INSTANTANEOUS CB which has RESTRICTED APPLICATION per NEC (C)(3) thus making the upstream ATS assembly noncompliant with the requirements of Article 230. Additionally, there is a safety concern since the load wiring to the fire pump controller is FIELD WIRING which would remain unprotected up to >20 times the FLC of the motor (NEC ). The correct Proposal should not permit the use of an Instantaneous CB and leave it as a Thermal Mag thus making this upstream transfer switch assembly compliant with the remainder of the NEC. (UL 1008 will be updated accordingly at a future time.) Submitter Full Name: CC on NEC-AAC Organization: CC on National Electrical Code Submittal Date: Wed Feb 26 10:40:44 EST 2014 Panel 13 FD Agenda page 27

32 Report on Comments June 2013 NFPA Log #290 NEC-P13 Final Action: Hold (695.3 and 695.4(A)) TCC Action: The Correlating Committee directs that the the items referenced in panel action be reported as "Hold." Submitter: Richard Schneider, Lancaster, SC Comment on Proposal No: 13-55a Recommendation: Retain text as per ROP which is: Change existing 695.3(F) to 695.3(G). NEW 695.3(F) to read: 695.3(F) Transfer of Power. Transfer of power to the fire pump controller between the individual source and one alternate supply shall take place within the pump room. (20:9.6.4) 695.3(G) Phase Converters. Phase converters shall not be permitted to be used for fire pump service. (20:9.1.7) Reject Comment on Affirmative for 695.3(F): Overcurrent Device Selection Delete/reject the entire proposed 695.3(F) text pertaining to Overcurrent Device Protection proposed by Mr. Neil Czarnecki. There was no Panel action on this proposed text - it was merely a comment on the affirmative. Add new New 695.3(H) Individually, Listed Fire Pump Controller and Power Transfer Switch Assembly (20: & ). a) Each fire pump shall have its own dedicated transfer switch, listed for fire service, where a transfer switch is required (20: ) b) A transfer switch separate from the fire pump controller is to be enclosed and contain its own overcurrent device in the same enclosure. The overcurrent device shall be selectively coordinated as required in 695.3(C)(3) c) This transfer switch assembly shall be SUSE (Suitable for Use as Service Equipment) rated when so used d) The disconnect contained therein shall not count against the quota established in 695.4(B)(1) Revising 695.4(A) as follows: 695.4(A) Direct Connection. The supply conductors shall directly connect the power source to either a listed fire pump controller or listed combination fire pump controller and power transfer switch or the listed transfer switch assembly described in 695.3(H). Substantiation: NEMA Proposal 13-55a was to commensurate changes in NEC 695 as extracted from revised NFPA 20 (2013), (aka Fig. A.10.8 ARRANGEMENT II). One of the changes was that the CB contained in the upstream ATS Assembly (being an upstream disconnect) was NOT to count against the quota (of 1 max) established in NFPA 20, That statement did not get included in 13-55a as proposed, but should have. The intent is to have the Upstream ATS Assembly comply with Article 230, using a THERMAL-MAGNETIC CB, since it needs most often to be SUSE rated. Proposal 13-55a purports to permit the use of an INSTANTANEOUS CB which has RESTRICTED APPLICATION per NEC (C)(3) thus making the upstream ATS assembly noncompliant with the requirements of Article 230. Additionally, there is a safety concern since the load wiring to the fire pump controller is FIELD WIRING which would remain unprotected up to >20 times the FLC of the motor (NEC ). The correct Proposal should not permit the use of an Instantaneous CB and leave it as a Thermal Mag thus making this upstream transfer switch assembly compliant with the remainder of the NEC. (UL 1008 will be updated accordingly at a future time.) Panel Meeting Action: Accept in Principle in Part CMP-13 holds the proposed new 695.3(H) and the reference in 695.4(A). Reject the recommendation in reference to the affirmative comment. The remainder is accepted in principle. Panel Statement: The proposed new 695.3(H) has not had public review and is new material. A technical committee cannot reject an affirmative comment. See the action and statement on Comment Number Eligible to Vote: 21 Ballot Results: Affirmative: 21 Printed on 2/26/2014 1

33 Report on Error mode Not set Log # Final Action: () TCC Action: The Correlating Committee directs that the the items referenced in panel action be reported as "Hold." Submitter:, Comment on Proposal No: Recommendation: Substantiation: NFPA Printed on 2/26/2014 2

34 Report on Proposals June 2013 NFPA a Log #3532 NEC-P13 Final Action: Accept in Principle (695.3(F) and 695.3(G)) Submitter: Vince Baclawski, National Electrical Manufacturers Association (NEMA) Recommendation: Change existing 695.3(F) to new 695.3(G) and insert new 695.3(F) as follows; 695.3(F) Transfer of Power. Transfer of power to the fire pump controller between the normal supply and one alternate supply shall take place within the pump room. [20:9.6.4] 695.3(F) (G) Phase Converters. Phase converters shall not be permitted to be used for fire pump service. [20:9.1.7] Substantiation: The proposed text extracts from NFPA 20, a critical installation requirement that the fire pump power transfer switch be installed in the fire pump room. Panel Meeting Action: Accept in Principle Revise the submitter's text to read as follows: 695.3(F) Transfer of Power. Transfer of power to the fire pump controller between the individual source and one alternate source shall take place within the pump room. The transfer switch shall be listed for fire pump service. [20:9.6.4] [20: ] 695.3(G) Phase Converters. Phase converters shall not be permitted to be used for fire pump service. [20:9.1.7] Panel Statement: CMP-13 accepts the submitter's concept. CMP-13 adds a requirement for listing for correlation with NFPA 20. The term "normal" is replace with the term "individual source" for consistency with Section Number Eligible to Vote: 18 Ballot Results: Affirmative: 18 Comment on Affirmative: CARON, D.: See my comment on Proposal CZARNECKI, N.: Add the following to 695.3(F): Overcurrent Device Selection. An instantaneous trip circuit breaker shall be permitted in lieu of the overcurrent devices specified in 695.4(B)(2) provided it is part of a transfer switch assembly listed for fire pump service. Currently, the NEC only permits the use of an instantaneous trip circuit breaker if provided as part of a listed combination motor controller as specified in (C)(3). The operating characteristics of an instantaneous trip circuit breaker lend themselves very well to the overcurrent protection permitted between the fire pump power source and the fire pump controller or the fire pump transfer switch. Such overcurrent protection is sized to provide only ground fault and short circuit protection for the fire pump motor circuit. It does not provide motor overload protection. Overload protection for the fire pump motor is provided by the circuit breaker in the fire pump controller. This arrangement prevents opening of the overcurrent protective device permitted between the fire pump power source and the fire pump controller or the fire pump transfer switch in the event of a motor overload. If this overcurrent protective device were to open, it may not accessible for immediate resetting and thus, render the fire pump motor inoperable. If the fire pump motor experiences an overload condition causing breaker tripping, it is desirable to have the fire pump breaker trip because it is easily located and reclosed to allow attempts to restart the fire pump motor during a fire event. Fire pumps can be temporarily distressed and one or more attempts at restarting can result in continuous running of the pump motor if the overload condition no longer exists. Instantaneous trip circuit breakers do not provide overload protection which is the required performance for the overcurrent protection permitted between the fire pump power source and the fire pump controller or the fire pump transfer switch. The magnetic trip setting of an instantaneous trip circuit breaker can easily be adjusted to provide the operating characteristics for overcurrent devices as specified in 695.4(B)(2). More importantly, an instantaneous trip circuit breaker does not need to be sized as large in amperes as other protective devices already permitted. Such oversizing is necessary to prevent their overload tripping characteristics from overlapping those of the fire pump circuit breaker. It is recognized that an instantaneous trip circuit breaker is intended to be a factory installed product. This is ensured by including the requirement that it shall be provided as part of a transfer switch assembly listed for fire pump service. Printed on 2/27/2014 1

35 3 of /24/ :59 PM Public Input No. 313-NFPA [ Global Input ] NOTE: The following Public Input appeared as Hold (Rejected but held) in Public Comment No (Log #536) of the A2013 ROC (Second Draft Report) for NFPA 70 and per the Regs. at The Correlating Committee directs that the panel action be reported as "Hold" because this comment contains new material that has not received public review. Additional Proposed Changes File Name Description Approved pdf P13-33.pdf P13-33 Recommendation: Add the following definition to 480.2: Prime Mover. A machine that transforms potential energy, such as electrical or thermal, to mechanical energy, typically an engine, turbine or electric motor. Substantiation: The term prime mover is used in as well as numerous other Articles in the NEC without definition. The term should be defined per the NEC Style Manual, Section Submitter Full Name: CC on NEC-AAC Organization: CC on National Electrical Code Submittal Date: Wed Feb 26 10:30:17 EST 2014 Panel 13 FD Agenda page 28

36 Report on Comments June 2013 NFPA Log #536 NEC-P13 Final Action: Hold (480.2) TCC Action: The Correlating Committee directs that the panel action be reported as Hold because this comment contains new material that has not received public review. Submitter: James E. Brunssen, Telecordia Technologies Inc. / Rep. Alliance for Telecommunications Industry Solutions (ATIS) Comment on Proposal No: Recommendation: Add the following definition to 480.2: Prime Mover. A machine that transforms potential energy, such as electrical or thermal, to mechanical energy, typically an engine, turbine or electric motor. Substantiation: The term prime mover is used in as well as numerous other Articles in the NEC without definition. The term should be defined per the NEC Style Manual, Section Panel Meeting Action: Reject Panel Statement: The definition of prime mover is technically incorrect. This comment contains new material that has not received public review. Number Eligible to Vote: 21 Ballot Results: Affirmative: 21 Printed on 2/26/2014 1

37 Report on Error mode Not set Log # Final Action: () TCC Action: The Correlating Committee directs that the panel action be reported as Hold because this comment contains new material that has not received public review. Submitter:, Comment on Proposal No: Recommendation: Substantiation: NFPA Printed on 2/26/2014 2

38 Report on Proposals June 2013 NFPA Log #2997 NEC-P13 Final Action: Accept in Part (480.4 and 480.5) Submitter: Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Recommendation: Revise text to read as follows: Overcurrent Protection for Prime Movers Over current protection shall not be required for conductors from a battery rated with a nominal voltage of less than volts if the battery provides power <etc> Disconnecting Means A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over volts. A disconnecting means shall be readily accessible and located within sight of the battery system. Substantiation: The change from 50 volts to 60 volts harmonizes Article 480 with Table 11(B) in Chapter 9 and (A)(1)(b). The voltage levels from 60 volts and less provide safety levels for shock and fire hazards. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. Panel Meeting Action: Accept in Part Revise the submitter's text to read as follows: Overcurrent Protection for Prime Movers. Overcurrent protection shall not be required for conductors from a battery with a nominal voltage of 50 volts or less if the battery provides power " Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over 50 volts. A disconnecting means shall be readily accessible and located within sight of the battery system. Informational Note is unchanged. Panel Statement: CMP-13 accepts the clarification that the requirements apply based on the "nominal voltage." CMP-13 does not accept the increase in the voltage level as it was not adequately substantiated by the proposal. The references in the supplied substantiation do not justify when battery system overcurrent protection can be omitted. CMP-13 understands the informational note following Section is to remain. Number Eligible to Vote: 18 Ballot Results: Affirmative: 18 Comment on Affirmative: LITTLE, L.: Further modifications to this section should be considered. The following proposed revisions were in a proposal not received by NFPA staff that was developed by a joint effort of the NEC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Committee. The section is retitled and subdivided as follows: DC Disconnect Methods (A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over 50 volts. A disconnecting means shall be readily accessible and located within sight of the battery system. (B) Remote Actuation. Where controls to activate the disconnecting means of a battery are not located within sight of a stationary battery system, the disconnecting means shall be capable of being locked in the open position in accordance with Section (C) Busway. Where a DC Busway system is installed, the disconnecting means shall be permitted to be incorporated into the busway. (D) Notification. A label shall be installed on or adjacent to the disconnect containing the maximum available short circuit current. The label shall be placed in a conspicuous location near the battery if a disconnect is not provided. Informational Note: Battery equipment suppliers can provide information about short circuit current on any particular battery model (A) requires remote activation for disconnects serving ITE rooms. The disconnect serving the ITE room must Printed on 2/27/2014 1

39 Report on Proposals June 2013 NFPA 70 be capable of being locked open to prevent the remote actuation from occurring when it will jeopardize safety of personnel. DC busway is common in large UPS installations in which there are multiple strings of batteries. Each string is connected in series to create the necessary dc voltage and each string has a disconnecting means &/or overcurrent protective device. The strings are connected in parallel to a common dc bus which may also have a disconnecting means. The individual string disconnects allow manual disconnecting so that maintenance can be performed on a redundant battery string while the remaining battery strings support the load. It also functions as an OCPD to prevent the energy from other strings from feeding into a faulted cell in one string. The disconnect on a DC busway system allows for a single point of shutdown for the entire dc supply. The stored energy in a battery system is a potential hazard to personnel maintaining the system. The labeling requirement attests this hazard and aids in determining the arc-flash protection boundary and required PPE. Printed on 2/27/2014 2

40 7 of /24/ :59 PM Public Input No. 335-NFPA [ Global Input ] NOTE: The following Public Input appeared as Rejected but held (Hold) in Public Comment No (Log #1079a) of the A2013 Second Draft Report (ROC) for NFPA 70 and per the Regs. at Additional Proposed Changes File Name pdf pdf P4-375 Description Approved Recommendation: Restore all of Part VII of Article 690, Storage Batteries to the text in the 2011 NEC Edition. [Staff Note: This comment has also been submitted to Panel 4 for action.] Substantiation: While this section was stricken in the Draft 2014 NEC, none of the requirements appear elesewhere in the Draft Code and the proposed new Article 696 addressing energy storage systems was NOT ADDED. Many of these requirements are critical to the safe installation and use of storage batteries and must remain in the NEC. We suggest that these requirements remain in Article 690 Part VII for at least one edition of the Code after they have been firmly, correctly and completely established elsewhere in an appropriate section of the NEC. Submitter Full Name: NEC on CMP13 Organization: NEC on CMP13 Submittal Date: Wed Feb 26 13:34:11 EST 2014 Panel 13 FD Agenda page 29

41 Report on Comments June 2013 NFPA Log #1079a NEC-P13 Final Action: Hold (696 (New) ) Submitter: John C. Wiles, Southwest Technology Development Institute, New Mexico State University Comment on Proposal No: Recommendation: Restore all of Part VII of Article 690, Storage Batteries to the text in the 2011 NEC Edition. [Staff Note: This comment has also been submitted to Panel 4 for action.] Substantiation: While this section was stricken in the Draft 2014 NEC, none of the requirements appear elesewhere in the Draft Code and the proposed new Article 696 addressing energy storage systems was NOT ADDED. Many of these requirements are critical to the safe installation and use of storage batteries and must remain in the NEC. We suggest that these requirements remain in Article 690 Part VII for at least one edition of the Code after they have been firmly, correctly and completely established elsewhere in an appropriate section of the NEC. Panel Meeting Action: Hold Panel Statement: See the panel action and statement on Comment Number Eligible to Vote: 21 Ballot Results: Affirmative: 21 Printed on 2/26/2014 1

42 Report on Proposals June 2013 NFPA Log #2917 NEC-P04 Final Action: Reject (696 (New) ) TCC Action: The Correlating Committee advises that the location and assignment of new Articles is the responsibility of the Correlating Committee and the Correlating Committee Rejects the panel action. The Correlating Committee directs that the Chairs of Code-Making Panels 4, 13, the Chair of the Correlating Committee DC Task Group, and the Chair of the NEC Smart Grid Task Group form a Task Group to reconsider this proposal, as the proposed text may be more suitable in this and other Articles. The Correlating Committee further directs that this proposal be forwarded to Code-Making Panels 4 and 13 for action. This action will be considered as a public comment by Code-Making Panels 4 and 13. Submitter: Robert H. Wills, Intergrid, LLC Recommendation: Move common language on Storage Batteries (Section VIII) in Articles 690, 692 & 694 to a new common Article 69X. Rename this article Energy Storage Systems : Article 69X Energy Storage Systems 69X.1 Scope. The provisions of this article apply to energy storage systems such as batteries, ultra-capacitors, flywheels, etc. Energy storage systems can be ac or dc devices, and can include inverters and converters to transform from one form to the other. 69X.3 Other Articles. Whenever the requirements of other articles of this Code and Article 69X differ, the requirements of Article 69X shall apply. 69X.11 Installation. (A) General. Storage batteries in an energy storage system shall be installed in accordance with the provisions of Article 480. For photovoltaic power sources, the storage system shall be considered to be grounded when the connected power source is installed in accordance with (B) Dwellings. (1) Operating Voltage. Energy storage systems for dwellings shall be configured so as to operate at less than volts nominal. Lead-acid storage batteries for dwellings shall have no more than twenty-four 2-volt cells connected in series (48-volts nominal). Exception: Where live parts are not accessible during routine battery maintenance, an energy storage system voltage in accordance with the maximum permitted for the connected energy source shall be permitted. (2) Guarding of Live Parts. Live parts of energy storage systems for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or type. Informational Note: Batteries in energy storage systems are subject to extensive charge discharge cycles and typically require frequent maintenance, such as checking electrolyte and cleaning connections. (C) Current Limiting. A listed, current-limiting, overcurrent device shall be installed in each circuit adjacent to the energy storage system where the available short-circuit current from a source exceeds the interrupting or withstand ratings of other equipment in that circuit. The installation of current-limiting fuses shall comply with 69x.20. (D) Battery Nonconductive Cases and Conductive Racks. Flooded, vented, lead-acid batteries with more than twenty-four 2-volt cells connected in series (48 volts, nominal) shall not use conductive cases or shall not be installed in conductive cases. Conductive racks used to support the nonconductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the nonconductive cases. This requirement shall not apply to any type of valve regulated lead-acid (VRLA) battery or any other types of sealed batteries that may require steel cases for proper operation. (E) Disconnection of Series Battery Circuits. Battery circuits subject to field servicing, where more than twenty four 2-volt cells are connected in series (48 volts, nominal), shall have provisions to disconnect the series-connected strings into segments of 24 cells or less for maintenance by qualified persons. Non load-break bolted or plug-in disconnects shall be permitted. (F) Battery Maintenance Disconnecting Means. Battery installations, where there are more than twenty-four 2-volt cells connected in series (48 volts, nominal), shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the battery electrical system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) for the remainder of the photovoltaic electrical system. A non load-break-rated switch shall be permitted to be used as the disconnecting means. (G) Battery Systems of More Than 48 Volts. On energy storage systems where the battery system consists of more than twenty-four 2-volt cells connected in series (more than 48 volts, nominal), the battery system shall be permitted to operate with ungrounded conductors, provided the following conditions are met: Printed on 3/6/2014 1

43 Report on Proposals June 2013 NFPA 70 (1) The photovoltaic array source and output circuits shall comply with (1) The dc and ac load circuits shall be solidly grounded. (2) All main ungrounded energy storage system input/output circuit conductors shall be provided with switched disconnects and overcurrent protection. (3) A ground-fault detector and indicator shall be installed to monitor for ground faults in the system. 69X.20 Fuses. Means shall be provided to disconnect a fuse from all sources of supply if the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply. 69X.30 Charge Control. (A) General. Equipment shall be provided to control the charging process of the energy storage system. Charge control shall not be required where the design of the energy source is matched to the voltage rating and charge current requirements of the energy storage system. For battery systems, this requirement can be met if the maximum charging current multiplied by 1 hour is less than 3 percent of the rated battery capacity expressed in ampere-hours or as recommended by the battery manufacturer. All adjusting means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain battery types such as valve regulated lead acid or nickel cadmium can experience thermal failure when overcharged. (B) Diversion Charge Controller. (1) Sole Means of Regulating Charging. An energy storage system employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging. (2) Circuits with Direct-Current Diversion Charge Controller and Diversion Load. Circuits containing a dc diversion charge controller and a dc diversion load shall comply with the following: (1) The current rating of the diversion load shall be less than or equal to the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum energy storage system voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the energy source. (2) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utility-interactive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (1) and (2): (1) These systems shall not be required to comply with 69X.30(B)(2). The charge regulation circuits used shall comply with the requirements of Energy system currents shall be considered to be continuous. (2) These systems shall have a second, independent means of controlling the energy storage system charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (C) Buck/Boost dc Converters. When buck/boost charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed, the following requirements must be met: (1) The ampacity of the conductors in output circuits shall be based on the maximum rated continuous, output current of the charge controller or converter for the selected output voltage range. (2) The voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range. 69X.74 Battery Interconnections. Flexible cables, as identified in Article 400, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed for hard-service use and identified as moisture resistant. Flexible, fine-stranded cables shall only be used with terminals, lugs, devices, and connectors that are listed and marked for such use. Substantiation: This proposal was developed by a subgroup of the NEC DC Task Force of the Technical Correlating Committee. The Task Force is chaired by John R. Kovacik, Underwriters Laboratories. The subgroup members are Robert Wills, Intergrid, LLC - subgroup lead), Audie Spina (Armstrong Industries) and David Geary (Starline DC Solutions). The same language for stand-alone systems is included in the three renewable energy Articles (690, 692 and 694). It makes sense to eliminate redundancy and to move it to a general Article so that common language can serve all three. We are already seeing significant divergence in the requirements for energy storage systems for PV, fuel cells and wind as it is difficult to coordinate the proposals for all of the technologies. It is possible to write a generic Article that addresses the issues raised in the existing Articles. Further, energy storage in renewable energy systems has gone beyond storage batteries. For example, ultra capacitors are now commonly used, and facility-scale hydraulic and compressed air energy storage systems are being developed. Printed on 3/6/2014 2

44 Report on Proposals June 2013 NFPA 70 By creating a new Article in Chapter 6 titled Energy Storage Systems, we have a place to address emerging technologies such as facility energy storage, ultra-capacitors, compressed air storage, bi-directional electric vehicle charging (V2G) etc. The language above is based on that of Article , but with the specific references changed to the generic term energy storage system. The language was also changed to make it compliant with the NEC Style Manual. Panel Meeting Action: Accept Panel Statement: The panel recognizes that this recommendation is under the purview of the Technical Correlating Committee. The panel requests the that Technical Correlating Committee consider the inclusion of this new article into the NEC. Number Eligible to Vote: 11 Ballot Results: Affirmative: 11 Comment on Affirmative: STAFFORD, T.: In this new proposed article in (F), in the second sentence, is it appropriate for the word photovoltaic to be in front of electrical system? Section has a sentence regarding flexible, fine stranded cables. Should we change the wording at the end of that sentence to reference instead of a listing? Printed on 3/6/2014 3

45 8 of /24/ :59 PM Public Input No. 336-NFPA [ Global Input ] NOTE: The following Public Input appeared as Rejected but held (Hold) in Public Comment No (Log #1383a) of the A2013 Second Draft Report (ROC) for NFPA 70 and per the Regs. at Additional Proposed Changes File Name pdf pdf P4-375 Description Approved Recommendation: Delete all proposed text. Substantiation: Schneider Electric recognizes that energy storage solutions can have unique requirements and warrant specific requirements for a safe installation. However, there are concerns that the proposed requirements need more industry review and input prior to being included in the code. For example the requirements in the proposed 69X.11(C) seem to conflict with the committee action on (H) in ROP The proposed text also contains a number of requirements for battery systems which may be better located in Article 480. In addition, some of the requirements seem to be directed at a particular installation type or size. The proposed 69X.11(F) would require a battery system disconnect to be accessible only to qualified personnel even in a dwelling installation. A better solution would be obtained through a task group working on this subject with new requirements proposed next cycle. Submitter Full Name: NEC on CMP13 Organization: NEC on CMP13 Submittal Date: Wed Feb 26 13:36:20 EST 2014 Panel 13 FD Agenda page 30

46 Report on Comments June 2013 NFPA Log #1383a NEC-P13 Final Action: Hold (696 (New) ) Submitter: Chad Kennedy, Schneider Electric Comment on Proposal No: Recommendation: Delete all proposed text. Substantiation: Schneider Electric recognizes that energy storage solutions can have unique requirements and warrant specific requirements for a safe installation. However, there are concerns that the proposed requirements need more industry review and input prior to being included in the code. For example the requirements in the proposed 69X.11(C) seem to conflict with the committee action on (H) in ROP The proposed text also contains a number of requirements for battery systems which may be better located in Article 480. In addition, some of the requirements seem to be directed at a particular installation type or size. The proposed 69X.11(F) would require a battery system disconnect to be accessible only to qualified personnel even in a dwelling installation. A better solution would be obtained through a task group working on this subject with new requirements proposed next cycle. Panel Meeting Action: Hold Panel Statement: See the panel action and statement on Comment Number Eligible to Vote: 21 Ballot Results: Affirmative: 21 Printed on 2/26/2014 1

47 Report on Proposals June 2013 NFPA Log #2917 NEC-P04 Final Action: Reject (696 (New) ) TCC Action: The Correlating Committee advises that the location and assignment of new Articles is the responsibility of the Correlating Committee and the Correlating Committee Rejects the panel action. The Correlating Committee directs that the Chairs of Code-Making Panels 4, 13, the Chair of the Correlating Committee DC Task Group, and the Chair of the NEC Smart Grid Task Group form a Task Group to reconsider this proposal, as the proposed text may be more suitable in this and other Articles. The Correlating Committee further directs that this proposal be forwarded to Code-Making Panels 4 and 13 for action. This action will be considered as a public comment by Code-Making Panels 4 and 13. Submitter: Robert H. Wills, Intergrid, LLC Recommendation: Move common language on Storage Batteries (Section VIII) in Articles 690, 692 & 694 to a new common Article 69X. Rename this article Energy Storage Systems : Article 69X Energy Storage Systems 69X.1 Scope. The provisions of this article apply to energy storage systems such as batteries, ultra-capacitors, flywheels, etc. Energy storage systems can be ac or dc devices, and can include inverters and converters to transform from one form to the other. 69X.3 Other Articles. Whenever the requirements of other articles of this Code and Article 69X differ, the requirements of Article 69X shall apply. 69X.11 Installation. (A) General. Storage batteries in an energy storage system shall be installed in accordance with the provisions of Article 480. For photovoltaic power sources, the storage system shall be considered to be grounded when the connected power source is installed in accordance with (B) Dwellings. (1) Operating Voltage. Energy storage systems for dwellings shall be configured so as to operate at less than volts nominal. Lead-acid storage batteries for dwellings shall have no more than twenty-four 2-volt cells connected in series (48-volts nominal). Exception: Where live parts are not accessible during routine battery maintenance, an energy storage system voltage in accordance with the maximum permitted for the connected energy source shall be permitted. (2) Guarding of Live Parts. Live parts of energy storage systems for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or type. Informational Note: Batteries in energy storage systems are subject to extensive charge discharge cycles and typically require frequent maintenance, such as checking electrolyte and cleaning connections. (C) Current Limiting. A listed, current-limiting, overcurrent device shall be installed in each circuit adjacent to the energy storage system where the available short-circuit current from a source exceeds the interrupting or withstand ratings of other equipment in that circuit. The installation of current-limiting fuses shall comply with 69x.20. (D) Battery Nonconductive Cases and Conductive Racks. Flooded, vented, lead-acid batteries with more than twenty-four 2-volt cells connected in series (48 volts, nominal) shall not use conductive cases or shall not be installed in conductive cases. Conductive racks used to support the nonconductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the nonconductive cases. This requirement shall not apply to any type of valve regulated lead-acid (VRLA) battery or any other types of sealed batteries that may require steel cases for proper operation. (E) Disconnection of Series Battery Circuits. Battery circuits subject to field servicing, where more than twenty four 2-volt cells are connected in series (48 volts, nominal), shall have provisions to disconnect the series-connected strings into segments of 24 cells or less for maintenance by qualified persons. Non load-break bolted or plug-in disconnects shall be permitted. (F) Battery Maintenance Disconnecting Means. Battery installations, where there are more than twenty-four 2-volt cells connected in series (48 volts, nominal), shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the battery electrical system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) for the remainder of the photovoltaic electrical system. A non load-break-rated switch shall be permitted to be used as the disconnecting means. (G) Battery Systems of More Than 48 Volts. On energy storage systems where the battery system consists of more than twenty-four 2-volt cells connected in series (more than 48 volts, nominal), the battery system shall be permitted to operate with ungrounded conductors, provided the following conditions are met: Printed on 3/6/2014 1

48 Report on Proposals June 2013 NFPA 70 (1) The photovoltaic array source and output circuits shall comply with (1) The dc and ac load circuits shall be solidly grounded. (2) All main ungrounded energy storage system input/output circuit conductors shall be provided with switched disconnects and overcurrent protection. (3) A ground-fault detector and indicator shall be installed to monitor for ground faults in the system. 69X.20 Fuses. Means shall be provided to disconnect a fuse from all sources of supply if the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply. 69X.30 Charge Control. (A) General. Equipment shall be provided to control the charging process of the energy storage system. Charge control shall not be required where the design of the energy source is matched to the voltage rating and charge current requirements of the energy storage system. For battery systems, this requirement can be met if the maximum charging current multiplied by 1 hour is less than 3 percent of the rated battery capacity expressed in ampere-hours or as recommended by the battery manufacturer. All adjusting means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain battery types such as valve regulated lead acid or nickel cadmium can experience thermal failure when overcharged. (B) Diversion Charge Controller. (1) Sole Means of Regulating Charging. An energy storage system employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging. (2) Circuits with Direct-Current Diversion Charge Controller and Diversion Load. Circuits containing a dc diversion charge controller and a dc diversion load shall comply with the following: (1) The current rating of the diversion load shall be less than or equal to the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum energy storage system voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the energy source. (2) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utility-interactive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (1) and (2): (1) These systems shall not be required to comply with 69X.30(B)(2). The charge regulation circuits used shall comply with the requirements of Energy system currents shall be considered to be continuous. (2) These systems shall have a second, independent means of controlling the energy storage system charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (C) Buck/Boost dc Converters. When buck/boost charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed, the following requirements must be met: (1) The ampacity of the conductors in output circuits shall be based on the maximum rated continuous, output current of the charge controller or converter for the selected output voltage range. (2) The voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range. 69X.74 Battery Interconnections. Flexible cables, as identified in Article 400, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed for hard-service use and identified as moisture resistant. Flexible, fine-stranded cables shall only be used with terminals, lugs, devices, and connectors that are listed and marked for such use. Substantiation: This proposal was developed by a subgroup of the NEC DC Task Force of the Technical Correlating Committee. The Task Force is chaired by John R. Kovacik, Underwriters Laboratories. The subgroup members are Robert Wills, Intergrid, LLC - subgroup lead), Audie Spina (Armstrong Industries) and David Geary (Starline DC Solutions). The same language for stand-alone systems is included in the three renewable energy Articles (690, 692 and 694). It makes sense to eliminate redundancy and to move it to a general Article so that common language can serve all three. We are already seeing significant divergence in the requirements for energy storage systems for PV, fuel cells and wind as it is difficult to coordinate the proposals for all of the technologies. It is possible to write a generic Article that addresses the issues raised in the existing Articles. Further, energy storage in renewable energy systems has gone beyond storage batteries. For example, ultra capacitors are now commonly used, and facility-scale hydraulic and compressed air energy storage systems are being developed. Printed on 3/6/2014 2

49 Report on Proposals June 2013 NFPA 70 By creating a new Article in Chapter 6 titled Energy Storage Systems, we have a place to address emerging technologies such as facility energy storage, ultra-capacitors, compressed air storage, bi-directional electric vehicle charging (V2G) etc. The language above is based on that of Article , but with the specific references changed to the generic term energy storage system. The language was also changed to make it compliant with the NEC Style Manual. Panel Meeting Action: Accept Panel Statement: The panel recognizes that this recommendation is under the purview of the Technical Correlating Committee. The panel requests the that Technical Correlating Committee consider the inclusion of this new article into the NEC. Number Eligible to Vote: 11 Ballot Results: Affirmative: 11 Comment on Affirmative: STAFFORD, T.: In this new proposed article in (F), in the second sentence, is it appropriate for the word photovoltaic to be in front of electrical system? Section has a sentence regarding flexible, fine stranded cables. Should we change the wording at the end of that sentence to reference instead of a listing? Printed on 3/6/2014 3

50 5 of /24/ :59 PM Public Input No. 306-NFPA [ Global Input ] NOTE: The following Public Input appeared as Hold (Rejected but held) in Public Comment No (Log #86a) of the A2013 ROC (Second Draft Report) for NFPA 70 and per the Regs. at This was a TCC Comment directing P13 to hold. They "Accepted" TCC directive to hold. Additional Proposed Changes File Name Description Approved pdf P4-375.pdf P4-375 Recommendation: The Correlating Committee advises that the location and assignment of new Articles is the responsibility of the Correlating Committee and the Correlating Committee Rejects the panel action. The Correlating Committee directs that the Chairs of Code-Making Panels 4, 13, the Chair of the Correlating Committee DC Task Group, and the Chair of the NEC Smart Grid Task Group form a Task Group to reconsider this proposal, as the proposed text may be more suitable in this and other Articles. The Correlating Committee further directs that this proposal be forwarded to Code-Making Panels 4 and 13 for action. Substantiation: This is a direction from the National Electrical Code Technical Correlating Committee in accordance with and of the Regulations Governing Committee Projects. Submitter Full Name: CC on NEC-AAC Organization: CC on National Electrical Code Submittal Date: Wed Feb 26 09:51:39 EST 2014 Panel 13 FD Agenda page 31

51 Report on Proposals June 2013 NFPA Log #2917 NEC-P04 Final Action: Reject (696 (New) ) TCC Action: The Correlating Committee advises that the location and assignment of new Articles is the responsibility of the Correlating Committee and the Correlating Committee Rejects the panel action. The Correlating Committee directs that the Chairs of Code-Making Panels 4, 13, the Chair of the Correlating Committee DC Task Group, and the Chair of the NEC Smart Grid Task Group form a Task Group to reconsider this proposal, as the proposed text may be more suitable in this and other Articles. The Correlating Committee further directs that this proposal be forwarded to Code-Making Panels 4 and 13 for action. This action will be considered as a public comment by Code-Making Panels 4 and 13. Submitter: Robert H. Wills, Intergrid, LLC Recommendation: Move common language on Storage Batteries (Section VIII) in Articles 690, 692 & 694 to a new common Article 69X. Rename this article Energy Storage Systems : Article 69X Energy Storage Systems 69X.1 Scope. The provisions of this article apply to energy storage systems such as batteries, ultra-capacitors, flywheels, etc. Energy storage systems can be ac or dc devices, and can include inverters and converters to transform from one form to the other. 69X.3 Other Articles. Whenever the requirements of other articles of this Code and Article 69X differ, the requirements of Article 69X shall apply. 69X.11 Installation. (A) General. Storage batteries in an energy storage system shall be installed in accordance with the provisions of Article 480. For photovoltaic power sources, the storage system shall be considered to be grounded when the connected power source is installed in accordance with (B) Dwellings. (1) Operating Voltage. Energy storage systems for dwellings shall be configured so as to operate at less than volts nominal. Lead-acid storage batteries for dwellings shall have no more than twenty-four 2-volt cells connected in series (48-volts nominal). Exception: Where live parts are not accessible during routine battery maintenance, an energy storage system voltage in accordance with the maximum permitted for the connected energy source shall be permitted. (2) Guarding of Live Parts. Live parts of energy storage systems for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or type. Informational Note: Batteries in energy storage systems are subject to extensive charge discharge cycles and typically require frequent maintenance, such as checking electrolyte and cleaning connections. (C) Current Limiting. A listed, current-limiting, overcurrent device shall be installed in each circuit adjacent to the energy storage system where the available short-circuit current from a source exceeds the interrupting or withstand ratings of other equipment in that circuit. The installation of current-limiting fuses shall comply with 69x.20. (D) Battery Nonconductive Cases and Conductive Racks. Flooded, vented, lead-acid batteries with more than twenty-four 2-volt cells connected in series (48 volts, nominal) shall not use conductive cases or shall not be installed in conductive cases. Conductive racks used to support the nonconductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the nonconductive cases. This requirement shall not apply to any type of valve regulated lead-acid (VRLA) battery or any other types of sealed batteries that may require steel cases for proper operation. (E) Disconnection of Series Battery Circuits. Battery circuits subject to field servicing, where more than twenty four 2-volt cells are connected in series (48 volts, nominal), shall have provisions to disconnect the series-connected strings into segments of 24 cells or less for maintenance by qualified persons. Non load-break bolted or plug-in disconnects shall be permitted. (F) Battery Maintenance Disconnecting Means. Battery installations, where there are more than twenty-four 2-volt cells connected in series (48 volts, nominal), shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the battery electrical system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) for the remainder of the photovoltaic electrical system. A non load-break-rated switch shall be permitted to be used as the disconnecting means. (G) Battery Systems of More Than 48 Volts. On energy storage systems where the battery system consists of more than twenty-four 2-volt cells connected in series (more than 48 volts, nominal), the battery system shall be permitted to operate with ungrounded conductors, provided the following conditions are met: Printed on 2/27/2014 1

52 Report on Proposals June 2013 NFPA 70 (1) The photovoltaic array source and output circuits shall comply with (1) The dc and ac load circuits shall be solidly grounded. (2) All main ungrounded energy storage system input/output circuit conductors shall be provided with switched disconnects and overcurrent protection. (3) A ground-fault detector and indicator shall be installed to monitor for ground faults in the system. 69X.20 Fuses. Means shall be provided to disconnect a fuse from all sources of supply if the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply. 69X.30 Charge Control. (A) General. Equipment shall be provided to control the charging process of the energy storage system. Charge control shall not be required where the design of the energy source is matched to the voltage rating and charge current requirements of the energy storage system. For battery systems, this requirement can be met if the maximum charging current multiplied by 1 hour is less than 3 percent of the rated battery capacity expressed in ampere-hours or as recommended by the battery manufacturer. All adjusting means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain battery types such as valve regulated lead acid or nickel cadmium can experience thermal failure when overcharged. (B) Diversion Charge Controller. (1) Sole Means of Regulating Charging. An energy storage system employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging. (2) Circuits with Direct-Current Diversion Charge Controller and Diversion Load. Circuits containing a dc diversion charge controller and a dc diversion load shall comply with the following: (1) The current rating of the diversion load shall be less than or equal to the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum energy storage system voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the energy source. (2) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utility-interactive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (1) and (2): (1) These systems shall not be required to comply with 69X.30(B)(2). The charge regulation circuits used shall comply with the requirements of Energy system currents shall be considered to be continuous. (2) These systems shall have a second, independent means of controlling the energy storage system charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (C) Buck/Boost dc Converters. When buck/boost charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed, the following requirements must be met: (1) The ampacity of the conductors in output circuits shall be based on the maximum rated continuous, output current of the charge controller or converter for the selected output voltage range. (2) The voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range. 69X.74 Battery Interconnections. Flexible cables, as identified in Article 400, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed for hard-service use and identified as moisture resistant. Flexible, fine-stranded cables shall only be used with terminals, lugs, devices, and connectors that are listed and marked for such use. Substantiation: This proposal was developed by a subgroup of the NEC DC Task Force of the Technical Correlating Committee. The Task Force is chaired by John R. Kovacik, Underwriters Laboratories. The subgroup members are Robert Wills, Intergrid, LLC - subgroup lead), Audie Spina (Armstrong Industries) and David Geary (Starline DC Solutions). The same language for stand-alone systems is included in the three renewable energy Articles (690, 692 and 694). It makes sense to eliminate redundancy and to move it to a general Article so that common language can serve all three. We are already seeing significant divergence in the requirements for energy storage systems for PV, fuel cells and wind as it is difficult to coordinate the proposals for all of the technologies. It is possible to write a generic Article that addresses the issues raised in the existing Articles. Further, energy storage in renewable energy systems has gone beyond storage batteries. For example, ultra capacitors are now commonly used, and facility-scale hydraulic and compressed air energy storage systems are being developed. Printed on 2/27/2014 2

53 Report on Proposals June 2013 NFPA 70 By creating a new Article in Chapter 6 titled Energy Storage Systems, we have a place to address emerging technologies such as facility energy storage, ultra-capacitors, compressed air storage, bi-directional electric vehicle charging (V2G) etc. The language above is based on that of Article , but with the specific references changed to the generic term energy storage system. The language was also changed to make it compliant with the NEC Style Manual. Panel Meeting Action: Accept Panel Statement: The panel recognizes that this recommendation is under the purview of the Technical Correlating Committee. The panel requests the that Technical Correlating Committee consider the inclusion of this new article into the NEC. Number Eligible to Vote: 11 Ballot Results: Affirmative: 11 Comment on Affirmative: STAFFORD, T.: In this new proposed article in (F), in the second sentence, is it appropriate for the word photovoltaic to be in front of electrical system? Section has a sentence regarding flexible, fine stranded cables. Should we change the wording at the end of that sentence to reference instead of a listing? Printed on 2/27/2014 3

54 Report on Comments June 2013 NFPA 70 Printed on 2/26/2014 1

55 of /24/2014 2:27 PM Public Input No NFPA [ New Part after I. ] add to Article 100 Section I. General Alternate Source (of Power) A. One or more generator sets; or battery systems or service(s) where permitted, intended to provide power during the interruption of the normal electrical service; or the public utility service intended to provide power during the interruption of service normally provided by the generating facilities on the premises. (1) When multiple generators are connected together on a common bus to serve load(s), the common bus between the generators shall be considered to be the source. The text of this definition closely matches the text in the NFPA standard definition of terms. There are several definitions and uses for "alternate source" in the NEC, including references in article 517, so rather than listing the definition only in 517 it would be better located in Article 100. It is important to add the note regarding multiple generators in parallel, in order to avoid confusion about what the source is relative to the system loads. This removes ambiguity about questions of grounding/bonding, what constitutes a feeder in the system vs. branch circuits, and how ground fault protection should be established. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 12:39:25 EDT 2014 Copyright Assignment I, Gary Olson, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Gary Olson, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 32

56 of /24/2014 2:28 PM Public Input No NFPA [ New Definition after Definition: Garage. ] TITLE OF NEW CONTENT Definition Generator - A rotary machine which converts mechanical energy into electrical energy. Generator Set - A complete packaged piece of equipment which produces electrical energy from fuel by mechanical or other means As shown in the attached chart, the terms generator and generator set are used over 160 times in numerous articles throughout the Code. While the general public may mistakenly interchange the terms, they are significantly different types of equipment with correspondingly different requirements for their safe selection and installation. At a functional level, present day generators aren't that much different from the inventions of Tesla and Edison and have a great deal in common with motors. Their safe installation needs to involve their internal construction details and external protection and controls. Modern generator sets on the other hand are complete units with built in controls and internal construction and protection details evaluated and tested to UL2200 by Nationally Recognized Testing Laboratories. As an installation standard, the NEC needs to be clear about which of its requirement should be applied to one or the other or, in some cases, both. NEC Article Summary of Usage 90.2 ref in Scope 100 ref in bonding jumper def. 100 Exhibit examples of feeder circuits shows set, labels it generator 100 Hybrid System def. correctly ref's hydro & engine driven generators (2 ref's) 100 Info note to Premise Wiring (System) references "generation systems, or generators" HdBk notes to Premise Wiring (System) incorrectly uses "portable generators" when referring to portable generator sets and also to Separately Derived Systems incorrectly uses "generators" for both gensets and generators comments on disconnects correctly says "supplied by an outdoor generator set." and "a generator feeder" (A) comment refers to "wind generators" Table about other articles lists 445 as "Generators" should be changed to "Generator Sets and Generators" (G) ref's to Generator in title & text, but applies to both, should change title & text (2 ref's) Info note ref on bonding separately derived system generator neutrals HdBk explanation of Exhibit refers only to generators with 14 ref's Exhibit & 13 examples of bonding and floating generators with 5 ref's Exhibit examples of bonding and floating generators with 3 ref's (B)2 grounding electrode exception for "portable or vehicle-mounted generators" Titled "Portable and Vehicle-Mounted Generators" HdBk explanation of Sec grounding and bonding of sep derived sys with 3 ref's (A) Titled "Portable and Vehicle Mounted Generators" and internally "generator" is used 7 times in body nfo text plus 5 additional times in HdBk notes (B)2 Vehicle mounted generators Titled "Permanently Installed Generators" (A) Separately Derived systems (B) Non-Separately Derived systems (D) System grounds for Impedance grounded systems "neutral point of the transformer or generator" (B) ref to grounding pipe organ MG frames (which are probably no longer being installed) HdBk explanation of w/ Exh about details of properly grounding DC services with 4 ref's Details of ungrounded, separately derived DC systems (A) Location of Imp Gnd "neutral point of the supply, transformer or generator." HdBk explanation of MV & HC Surge Arrestor application at generating station with 2 ref's 300.1(B) HdBk explanation that NEC req's do not apply to internal wiring of equipment Panel 13 FD Agenda page 33

57 of /24/2014 2:28 PM Pull box req's don't apply to gen or motor term boxes with 2 ref's 404.6(6) HdBk explanation that generators can be sources of hazardous voltage back feeds 406.4(B) Portable generator set receptacles must be grounded per HdBk caution about generators back feeding buildings with double ended "suicide cords" 430.7(A) HdBk reference to MG Labelling req's for MG sets HdBk reference to MG Speed limitations for MG's HdBk explanation about hazards of generator over speed protection req's (D) Control requirements for MG's HdBk mention of "starting solenoid at a generator location" OCP for motors in MV & HV MG sets 500.5(7) Text reference to "Gas generator rooms", (not electrical generators) Notes on Generator installations in Class I locations with 2 ref's Req's for Control transformers in Class I locations Req's for Motors and Generators for Class I, Div 1 locations with 2 ref's (B) Req's for Motors and Generators for Class I, Div 2 locations with 4 ref's (A) Motors and Generators for Class II, Div 1 haz locations with 2 ref's (B) Motors and Generators for Class II, Div 2 haz locations with 2 ref's Vent pipe req's for Motors and Generators for Class II locations (A)3 Req's for Signals, alarms, etc. for rotating machinery in Class II, Div (B)4 Req's for Signals, alarms, etc. for rotating machinery in Class II, Div Req's for Control transformers in Class III, Div 1 & 2 locations Req's for Motors and Generators for Class III, Div 1 & 2 locations with 2 ref's Vent pipe req's for Motors and Generators for Class III, Div 1 & 2 locations 505.5(B) Classification of Hazardous locations text includes "gas generator rooms" HdBk mention that "Increased Safety "e" technique is used with generators (E) Motors & Generators need drainage provisions where required with 2 ref's (C) Details about equipment approved for Zone 2 to be installed with 2 ref's Req's for using "Increased Safety "e" Motor and Generators" with 5 ref's 511.7(B)(1) Req's for "arcing equipment" installed above Aircraft Hanger Class 1 locations 513.7(B)(1) More Req's for "arcing equipment" not installed above Aircraft Hanger Class 1 locations Def's that generator sets can be Alternate Power Sources HdBk explanation that don't want Ground Fault Protection (tripping) on essential feeders (D) Refers to generators sets when stating Capacity of System requirements with 6 ref's (E) Refers to "generator set" lighting and work outlet requirement with 3 ref's (F) Refers to generator set accessories with 8 ref's (A) Exception A refers to "overloading the generator" (B) HdBk caution that putting individual room HVAC units on "the generator" may not work (C) Refers to "Generator accessories" when could be Generator set accessories with 3 ref's (B) Refers to "Generator driven.." and "generator units" with 3 ref's (C) Refers to "Generator sets.." and "generating sources" with 2 ref's (F) Refers to "generator set" lighting and work outlet requirement 2 ref's (B) Def's "generators driven by..." as OK Alternate Sources of Power with 3 ref's (A) Def's "generators system..." as OK Essential Elect. System power system (D) Req's to install "generator system per (B)(2) Req's to fully enclose arcing equipment such as generators above Hazardous locations (A)(1) Lists "generator sets" as a means to power isolated circuits (A)(2) Requires output of MG's powering isolated circuits to be ungrounded (A)(3) MG's powering isolated circuits can't be in hazardous locations HdBk note lists "generators and transformers" as power sources Refers to "separately derived system such as a generator (2 ref's) Art on DC gen's for Film studio substations with 2 ref's HdBk note that they don't use MG's for movie theater projector any more (A) details about MG's & misc. equipment when nitrate film is used 551.4(B) RV "generator installations" RV Generator Installations Req's Other RV sources "engine generators" (B) OK to have locks on genset compartment access doors (R) Req's for "Pre-wiring for Generator Installation" with 6 ref's 590.6(A)(3) GFCI req's for portable set 15kW with 4 ref's Panel 13 FD Agenda page 34

58 of /24/2014 2:28 PM fig diagram shows a "pattern generator" 620.3(A) elevator related "generator sets" shall be less than 1,000 volts ampacity req's for MG field leads (4 ref's) (A)(1) elevator MG lead details ( C )(1&2) elevator disconnect means details with 7 ref's (B)(1&2) details of overcurrent protection for elevators, etc. with 6 ref's Table (A) Duty Cycle table for "Nonmotor Generator" & "Motor Generator" welders (B) Welder calculation example Definition references "tone generators" (L) "Generators shall be installed." Mod Data Ctr Emerg Lights powered from generator sets" with 2 ref's Induction heating converting devices include MG''s HdBk mention of high freq. dielectric heating generator with 4 ref's (B) MG supply conductor ampacity with 2 ref's MG supply disconnecting means with 2 ref's (B) Electrolytic cell MG req's Five mentions of tub "sanitizer generators" in different definitions More mentions of tub "sanitizer generators" in articles More mentions of tub "sanitizer generators" in articles (E) HdBk note mentions 'backup generator" Scope refers to one or more "wind electric generators" with 2 ref's Def. mentions "a wind generator" with 2 ref's Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (B)] Public Input No NFPA [Section No ] Public Input No NFPA [Section No (B)] Public Input No NFPA [Article 445] Relationship clarifies use of generator vs. generator set clarifies use of generator vs. generator set clarifies use of generator vs. generator set clarifies use of generator vs. generator set Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Tue Nov 04 05:38:41 EST 2014 Copyright Assignment I, Brian Brady, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Brian Brady, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 35

59 of /24/2014 2:29 PM Public Input No NFPA [ Global Input ] Add this new definition to Article 100: Primary Power Source. A source of electricity such as an electric power production and distribution network, another area power system, or a primary on-site power source. Also referred to as "primary source". The term "primary source" is used 23 times in the 2014 Code, but not defined in Article 100. It is loosely defined in the informational note to Article 705's scope. As it is a term used in multiple articles, it qualifies for inclusion in Article 100. The term "primary power source" is not currently used the the Code, but is a more concise encapsulation of the concept. The task group developing Article 710 used "primary power source" for this reason. Noting in the definition that "primary source" is synonymous allows brevity where appropriate. A clear definition of "primary (power) source" is very important for the understanding of Articles 705 and 710. This proposal involves three actions: 1/ create the new definition 2/ Change Article 705 scope (see PI-) 3/ Delete the definition of "primary power source" in Article 710[new] Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Revised scope using this definition Submitter Full Name: Robert Wills Organization: Intergrid, LLC Affilliation: American Wind Energy Association Submittal Date: Fri Nov 07 01:35:59 EST 2014 Copyright Assignment I, Robert Wills, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Robert Wills, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 36

60 372 of /18/2014 2:46 PM Public Input No NFPA [ Article 445 ] Article 445 Generator Sets and Generators Scope. This article contains installation and other requirements for generator sets and individual generators Location. Generators Generator sets and generators shall be of a type suitable for the locations in which they are installed. They Generators shall also meet the requirements for motors in Marking. Each generator shall be provided with a nameplate giving the manufacturer s name, the rated frequency, the number of phases if of ac, the rating in kilowatts or kilovolt-amperes, the normal volts and amperes corresponding to the rating, the rated revolutions per minute, and the rated ambient temperature or rated temperature rise. Nameplates for all stationary generators and portable generators rated more than 15 kw shall also give the power factor, the subtransient and transient impedances, the insulation system class, and the time rating. Marking shall be provided by the manufacturer to indicate whether or not the generator neutral is bonded to the generator frame. Where the bonding of a generator is modified in the field, additional marking shall be required to indicate whether the generator neutral is bonded to the generator frame Overcurrent Protection. (A) Constant-Voltage Generators. Constant-voltage generators, except ac generator exciters, shall be protected from overload by inherent design, circuit breakers, fuses, protective relays, or other identified overcurrent protective means suitable for the conditions of use. (B) Two-Wire Generators. Two-wire, dc generators shall be permitted to have overcurrent protection in one conductor only if the overcurrent device is actuated by the entire current generated other than the current in the shunt field. The overcurrent device shall not open the shunt field. (C) 65 Volts or Less. Generators operating at 65 volts or less and driven by individual motors shall be considered as protected by the overcurrent device protecting the motor if these devices will operate when the generators are delivering not more than 150 percent of their full-load rated current. (D) Balancer Sets. Two-wire, dc generators used in conjunction with balancer sets to obtain neutral points for 3-wire systems shall be equipped with overcurrent devices that disconnect the 3-wire system in case of excessive unbalancing of voltages or currents. (E) Three-Wire, Direct-Current Generators. Three-wire, dc generators, whether compound or shunt wound, shall be equipped with overcurrent devices, one in each armature lead, and connected so as to be actuated by the entire current from the armature. Such overcurrent devices shall consist either of a double-pole, double-coil circuit breaker or of a 4-pole circuit breaker connected in the main and equalizer leads and tripped by two overcurrent devices, one in each armature lead. Such protective devices shall be interlocked so that no one pole can be opened without simultaneously disconnecting both leads of the armature from the system. Exception to (A) through (E): Where deemed by the authority having jurisdiction that a generator is vital to the operation of an electrical system and the generator should operate to failure to prevent a greater hazard to persons, the overload sensing device(s) shall be permitted to be connected to an annunciator or alarm supervised by authorized personnel instead of interrupting the generator circuit Ampacity of Conductors. The ampacity of the conductors from the generator terminals to the first distribution device(s) containing overcurrent protection shall not be less than 115 percent of the nameplate current rating of the generator. It shall be permitted to size the neutral conductors in accordance with Conductors that must carry ground-fault currents shall not be smaller than required by (A). Neutral conductors of dc generators that must carry ground-fault currents shall not be smaller than the minimum required size of the largest conductor. Exception: Where the design and operation of the generator prevent overloading, the ampacity of the conductors shall not be less than 100 percent of the nameplate current rating of the generator Protection of Live Parts. Live parts of generators operated at more than 50 volts to ground shall not be exposed to accidental contact where accessible to unqualified persons. Panel 13 FD Agenda page 37

61 373 of /18/2014 2:46 PM Guards for Attendants. Where necessary for the safety of attendants, the requirements of shall apply Bushings. Where field-installed wiring passes through an opening in an enclosure, a conduit box, or a barrier, a bushing shall be used to protect the conductors from the edges of an opening having sharp edges. The bushing shall have smooth, well-rounded surfaces where it may be in contact with the conductors. If used where oils, grease, or other contaminants may be present, the bushing shall be made of a material not deleteriously affected Generator Terminal Housings. Generator terminal housings shall comply with Where a horsepower rating is required to determine the required minimum size of the generator terminal housing, the full-load current of the generator shall be compared with comparable motors in Table through Table The higher horsepower rating of Table and Table shall be used whenever the generator selection is between two ratings. Exception: This section shall not apply to generators rated over 600 volts Disconnecting Means Required for Generators. Generators shall be equipped with a disconnect(s), lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: (1) Portable generators are cord- and plug-connected, or (2) Both of the following conditions apply: (3) The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with (4) The generator is not arranged to operate in parallel with another generator or other source of voltage. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15- and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the 125/250-volt locking-type receptacle is in use. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. The overwhelming percentage of current installations are of complete generator sets, not individual generators. The requirements and issues related to the safe and reliable selection and installation of a complete generator set are significantly different from those of an individual generator and should be accurately reflected in this section's requirements. Related Public Inputs for This Document Related Input Public Input No NFPA [New Definition after Definition: Garage.] Public Input No NFPA [Section No ] Relationship Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Mon Nov 03 17:24:28 EST 2014 Panel 13 FD Agenda page 38

62 376 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] TITLE OF NEW CONTENT Equipment. The generator equipment shall be listed and rated for the application. Additional Proposed Changes File Name docx Description Approved Equipment UL2200 is the UL ANSI standard for Engine Generator assemblies and it addresses safety concerns for both the electrical and fuel control safety that are related to electrical generating equipment. These generators may be driven by gasoline, LP-gas, natural gas or diesel-fueled internal combustion engines. Additionally the standard addresses stationary engine generator assemblies intended for installation and use in ordinary locations in accordance with the National Electrical Code NFPA 70; the Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, NFPA 37, the Standard for Health Care Facilities, NFPA 99, and the Standard for Emergency and Standby Power Systems, NFPA 110. UL2200 includes numerous NEC references and requirements to facilitate a Code compliant engine generator electrical installation. Additionally UL2201 has been published to address the safety concerns associated with portable generators. Submitter Full Name: Timothy Zgonena Organization: UL LLC Submittal Date: Fri Nov 07 16:12:12 EST 2014 Panel 13 FD Agenda page 39

63 NFPA Public Input Form NOTE: All Public Input must be received by 5:00 pm EST/EDST on the published Public Input Closing Date. For further information on the standards-making process, please contact the Codes and Standards Administration at or visit For technical assistance, please call NFPA at FOR OFFICE USE ONLY Log #: Date Rec d: Date 10/31/2014 Name Timothy Zgonena Tel. No Company UL LLC Street Address 333 Pfingsten Rd City Northbrook State IL Zip Please indicate organization represented (if any) 1. (a) Title of NFPA Standard (b) Section/Paragraph UL LLC 2014 Edition NATIONAL ELECTRICAL CODE NFPA No. & Year NFPA 70, Public Input Recommends (check one): new text revised text deleted text 3. Proposed Text of Public Input (include proposed new or revised wording, or identification of wording to be deleted): [Note: Proposed text should be in legislative format; i.e., use underscore to denote wording to be inserted (inserted wording) and strikethrough to denote wording to be deleted (deleted wording).] Equipment. The generator equipment shall be listed and rated for the application. 4. : (Note: State the problem that would be resolved by your recommendation; give the specific reason for your Public Input, including copies of tests, research papers, fire experience, etc. If more than 200 words, it may be abstracted for publication.) UL2200 is the UL ANSI standard for Engine Generator assemblies and it addresses safety concerns for both the electrical and fuel control safety that are related to electrical generating equipment. These generators may be driven by gasoline, LP-gas, natural gas or diesel-fueled internal combustion engines. Additionally the standard addresses stationary engine generator assemblies intended for installation and use in ordinary locations in accordance with the National Electrical Code NFPA 70; the Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, NFPA 37, the Standard for Health Care Facilities, NFPA 99, and the Standard for Emergency and Standby Power Systems, NFPA 110. UL2200 includes numerous NEC references and requirements to facilitate a Code compliant engine generator electrical installation. Additionally UL2201 has been published to address the safety concerns associated with portable generators. 5. Copyright Assignment (a) I am the author of the text or other material (such as illustrations, graphs) proposed in the Public Input. (b) Some or all of the text or other material proposed in this Public Input was not authored by me. Its source is as follows: (please identify which material and provide complete information on its source) I hereby grant and assign to the NFPA all and full rights in copyright in this Public Input (including both the Proposed Text and the Statement of Problem and Substantiation). I understand that I acquire no rights in any publication of NFPA in which this Public Input in this or another similar or analogous form is used. Except to the extent that I do not have authority to make an assignment in materials that I have identified in (b) above, I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this assignment. Signature (Required) PLEASE USE SEPARATE FORM FOR EACH PUBLIC INPUT To: Secretary, Standards Council National Fire Protection Association 1 Batterymarch Park Quincy, MA OR Fax to: (617) OR to: proposals_comments@nfpa.org 11/13/2014

64 377 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. This article contains installation and other requirements for generators. Informational Note: For additional information about generator installation and protection see IEEE P Recommended Practice for Generator Protection in Industrial and Commercial Power Systems Generator installation and protection should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Tue Nov 04 07:21:06 EST 2014 Panel 13 FD Agenda page 40

65 378 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Location. Generators shall be of a type suitable for the locations in which they are installed. They shall also meet the requirements for motors in The sentence is extraneous because detailed installation requirements and tests to validate the requirements are covered in NFPA 110. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 12:08:28 EDT 2014 Panel 13 FD Agenda page 41

66 379 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Location. Generators shall be of a type suitable for the locations in which they are installed. They shall also meet the requirements for motors in Stationary generators that are driven by combustion engines shall be installed in accordance with (A) and (B). (1) The exhaust shall be directed away from any adjacent dwelling. (2) The exhaust opening shall be 20 feet from any opening in a dwelling (such as a window, door, crawl space access at or below grade level, or ventilation opening) as measured horizontally from the generator exhaust to the closest point on the dwelling opening. Presently, the NEC does not address carbon monoxide poisoning hazards for stationary generators. By adding this requirement to the NEC as an installation requirement, consumer carbon monoxide poisoning incidents and deaths from stationary generators will be reduced. The U.S. Consumer Product Safety Commission s (CPSC s) databases include at least two incidents involving stationary generators installed outdoors that caused CO poisonings indoors. In one incident (CPSC IDI HNE1118) in 2011, a 7 kilowatt (kw) stationary generator powered by a propane engine was installed near ventilation openings causing 2 fatalities. In the other incident (CPSC IDI HNE2737) in 2005, a 12 kw stationary generator powered by a propane engine caused 4 severe non-fatal CO poisonings. The stationary generator was installed on the side of the house right under a large window and next to the air conditioner ventilation system. The Environmental Protection Agency s Nonroad Small Spark-Ignition Engine Certification Data1 includes data that shows the CO emission rates from propane and natural gas-fueled engines, such as those used in stationary generators, are often just as high as those from gasoline-fueled engines, such as those used in portable generators. For the 10-year period of 2004 through 20132, CPSC has reports of 15 non-work related consumer CO deaths resulting from the exhaust of gasoline-fueled portable generators operating outdoors infiltrating the homes; and there are other published sources that also show CO deaths and injuries from outdoor operation of gasoline-fueled portable generators. A number of these sources document that the injured consumers generally used their portable generators an average of only a few feet away from the nearest door or window.3,4 In 2013, the Centers for Disease Control and Prevention (CDC) began recommending that portable generators should never be placed less than 20 feet from an open window, door, or vent where exhaust can vent into an enclosed area5 and CPSC is now making this recommendation as well6. This recommendation is based on results of modeling studies performed by the National Institute of Standards and Technology (NIST) on the effects on indoor CO concentration profiles of operating an existing, gasoline-fueled carbureted generator outdoors.7,8 NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines and UL 2200, Standard for Stationary Engine Generator Assemblies deal only with fire and shock hazards; they do not address the CO poisoning hazard related to exhaust emissions. The natural gas and propane engines used in stationary generators have comparable CO emission rates to gasoline-fueled portable generators1, which have a long history of causing CO poisoning fatalities and injuries when placed outside the home but close enough to allow the exhaust to infiltrate indoors. NFPA 37 currently allows stationary generators to be located 5 ft from openings in walls (e.g., windows, doors) and even closer placement, with NO minimum distance, if the adjacent structure wall is fire resistant or the generator enclosure will not ignite combustible materials outside the enclosure. The applicable section of NFPA 37 is provided below for reference: Chapter 4 Engines General Requirements 4.1 Engine Locations Engines Located Outdoors. Engines, and their weatherproof housings if provided, that are installed outdoors shall be located at least 1.5 m (5 ft) from openings in walls and at least 1.5 m (5 ft) from structures having combustible walls. A minimum separation shall not be required where either of the following conditions exist: (1) The adjacent wall of the structure has a fire resistance rating of at least 1 hour. (2) The weatherproof enclosure is constructed of noncombustible materials and it has been demonstrated that a fire within the enclosure will not ignite combustible materials outside the enclosure. References: Panel 13 FD Agenda page 42

67 380 of /18/2014 2:46 PM 1. CO emission rates of natural gas and propane engines in the EPA s exhaust emission database for small nonroad spark ignited engines have CO emission rates comparable to the gasoline-fueled engines. (available online at 2. Matthew V. Hnatov, U.S. Consumer Product Safety Commission, Incidents, Deaths, and In-Depth Investigations Associated with Non-Fire Carbon Monoxide from Engine-Driven Generators and Other Engine-Driven Tools, , Generators/GeneratorsandOEDTFatalities-2014-FINAL.pdf<, June CDC, Carbon Monoxide Poisonings After Two Major Hurricanes - Alabama And Texas, August - October 2005, Morbidity and Mortality Weekly Report (MMWR), United States Centers for Disease Control and Prevention: CDC, Carbon Monoxide Poisoning from Hurricane-Associated Use of Portable Generators- Florida, 2004, MMWR 2005; 54: Carbon Monoxide Poison Prevention, Centers for Disease Control and Prevention (CDC) webpage, 6. U.S. Consumer Product Safety Commission Winter Weather Alert: Generators, CPSC website, 7. Liangzhu (Leon) Wang, S. J. Emmerich, NIST Technical Note 1637, Modeling the Effects of Outdoor Gasoline Powered Generator Use on Indoor Carbon Monoxide Exposures, August 2009 (available online at /bfrlpubs/build09/art009.html.) 8. Liangzhu (Leon) Wang, S. J. Emmerich, and R. Powell, NIST Technical Note 1666, Modeling the Effects of Outdoor Gasoline Powered Generator Use on Indoor Carbon Monoxide Exposures Phase II, July (available online at Submitter Full Name: Douglas Lee Organization: US Consumer Product Safety Commission (CPSC) Affilliation: CPSC staff Submittal Date: Fri Nov 07 10:53:15 EST 2014 Panel 13 FD Agenda page 43

68 647 of /18/2014 2:46 PM Public Input No. 500-NFPA [ Section No ] Marking. Each generator shall be provided with a nameplate giving the manufacturer s name, the rated frequency, the number of phases if of ac, the rating in kilowatts or kilovolt-amperes, the normal volts and amperes corresponding to the rating, the rated revolutions per minute, and the rated ambient temperature or rated temperature rise. Nameplates for all stationary generators and portable generators rated more than 15 kw shall also give the power factor, the subtransient and transient impedances, the insulation system class, and the time rating. Marking shall be provided by the manufacturer to the installer or other qualified individual to indicate whether or not the generator neutral is bonded to the generator frame. Where the bonding of a generator is modified in the field, additional marking marking shall be required to indicate be revised to indicate whether the generator neutral is bonded to the generator frame. Rationale: Due to product liability concerns, I have advised my product teams to NOT provide such marking. If a manufacturer provides said marking and field personnel re-configure the machine and neglect to change the marking, then the manufacturer could be held liable for losses experienced by a misrepresented product. Determining whether the neutral is required to be bonded to the generator frame (or the manufacturer s intended grounding location) must be determined when the unit is installed by a qualified individual and it is only that individual who shall declare the neutral conductor s condition after making any required changes. The generator neutral post and/or conductor are typically clearly visible and any method for bonding the neutral to the generator frame should also be clearly visible to affect a proper, thorough electrical inspection. Furthermore, a qualified individual must know, understand, and have demonstrated how to test to determine whether the neutral is bonded to the generator frame. A receptacle to be installed downstream of a ground fault protective device is not marked one way or another. This proposed change will make Article consistent to the Article requiring a qualified individual to mark a duplex receptacle when installed downstream of a ground fault protective device. Submitter Full Name: Steven Sappington Organization: Caterpillar Inc Submittal Date: Fri Apr 11 16:04:49 EDT 2014 Panel 13 FD Agenda page 44

69 381 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Marking. Each generator set shall be provided with a nameplate giving the manufacturer s name, if ac, the rated output frequency, the and number of phases if of ac, the rating in kilowatts or kilowatts and kilovoltamperes or power factor ratings, the normal volts and amperes corresponding to the rating, the and the maximum available peak transient fault current. Generator nameplates shall also give the rated revolutions per minute, and the rated ambient temperature or rated temperature rise. Nameplates for all stationary generators and portable generators rated more than 15 kw shall also give the power factor, the subtransient and transient impedances, the insulation system class, and the time rating and the subtransient and transient impedances. Marking shall be provided by the manufacturer to indicate whether or not the generator unit's neutral is bonded to the generator its frame. Where the bonding of a generator is modified in the field, additional marking shall be required to indicate whether the generator neutral the neutral is bonded to the generator frame. Generator and generator sets are significantly different and although their names are often used interchangeably they have significantly different installation requirements. The requirements for the selection and installation of individual generators have much in common with motors and may involve their internal construction details which manufacturers make available to engineers and contractors in their documentation. However, generator sets are complete complex machines, particularly the newer variable speed inverter based models. In those cases, some parameters of their internal components, such as alternator transient reactances may not be relevant to their protective requirements which are established by their inverter programming. Because of that, while their internal construction details are evaluated and approved by UL or other NRTL's to detailed equipment standards, as an installation standard, the NEC needs to focus on their external interfaces. The proposed language changes attempt to clarify those distinctions and more clearly organize the requirements in a more user friendly and technically precise manner. Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Sat Nov 01 09:39:21 EDT 2014 Panel 13 FD Agenda page 45

70 382 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Marking. Each generator shall be provided with a nameplate giving the manufacturer s name, the rated frequency, the number of phases if of ac, the rating in kilowatts or kilovolt-amperes, the normal volts and amperes corresponding to the rating, the rated revolutions per minute, and the rated ambient temperature or rated temperature rise. Nameplates for all stationary generators and portable generators rated more than 15 kw shall also give the power factor, the subtransient and transient impedances reactances, the insulation system class, and the time rating. Marking shall be provided by the manufacturer to indicate whether or not the generator neutral is bonded to the generator frame. Where the bonding of a generator is modified in the field, additional marking shall be required to indicate whether the generator neutral is bonded to the generator frame. Additional Proposed Changes File Name Description Approved WEG_alternator_data_page.pdf WEG alternator specification sheet. The current wording (impedance vs. reactance) may cause confusion between alternator manufacturers, engine generator manufacturers and AHJ for the following reasons; 1. Current terminology is in conflict with the nationally recognized standard that is used to obtain these values for the alternator. This standard is IEEE 115 IEEE Guide for Test Procedures for Synchronous Machines. Reference section 11.7 (Tests for transient and subtransient direct-axis parameters (reactance values). Reactance is the proper term. 2. This will allow a direct correlation between the nameplates on the alternators and the alternator manufacturer s specification catalogs. See attached WEG alternator data sheet. 3. Furthermore Impedance is defined as the total opposition to the flow of current. It is the combined effect of the resistance and the reactance of a circuit. Submitter Full Name: JEFF JONAS Organization: GENERAC POWER SYSTEMS Affilliation: Generac Power Systems, Inc. Submittal Date: Thu Nov 06 23:36:11 EST 2014 Panel 13 FD Agenda page 46

71 383 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) 65 Actual Volts or Less. Generators operating at 65 actual volts or less and driven by individual motors shall be considered as protected by the overcurrent device protecting the motor if these devices will operate when the generators are delivering not more than 150 percent of their full-load rated current. This section uses a voltage that is an "actual" hard limit. Refer to the substantiation for 1902 for more information. Related Public Inputs for This Document Related Input Relationship Public Input No NFPA [Global Input] This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Fri Oct 17 15:53:00 EDT 2014 Panel 13 FD Agenda page 47

72 385 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ampacity of Conductors. The ampacity of the conductors from the generator terminals to the first distribution device(s) containing overcurrent protection shall not be less than 115 percent of the nameplate current rating of the generator. It shall be permitted to size the neutral conductors in accordance with Conductors that must carry ground-fault currents shall not be smaller than required by (C) or (A) as applicable. Neutral conductors of dc generators that must carry ground-fault currents shall not be smaller than the minimum required size of the largest conductor. Exception: Where the design and operation of the generator prevent overloading, the ampacity of the conductors shall not be less than 100 percent of the nameplate current rating of the generator. The existing text is correct for separately derived systems, but does not apply to generators that are not separately derived. The additional reference in this input corrects the oversight. Submitter Full Name: Frederic Hartwell Organization: Hartwell Electrical Services, Inc. Submittal Date: Thu Nov 06 13:10:13 EST 2014 Panel 13 FD Agenda page 48

73 384 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ampacity of Conductors. The ampacity of the unprotected feeder conductors from the generator output terminals to the first distribution device(s) containing overcurrent protection shall not be less than 115 percent of the nameplate current rating of the generator set or generator. Conductors with overcurrent protection shall be sized according to the requirements of Article 240. It shall be permitted to size the neutral conductors in accordance with Conductors that must carry ground-fault currents shall not be smaller than required by (A). Neutral conductors of dc generators that must carry ground-fault currents shall not be smaller than the minimum required size of the largest conductor. Exception: Where the design and operation of the generator prevent overloading, the ampacity of the conductors shall not be less than 100 percent of the nameplate current rating of the generator. Generator sets and generators powering multiple feeders including smaller ampacity ones for special loads such as fire pumps through individual OCPD's has been a common and fully accepted practice for many years. (For example, see recommendations in the IAEI NEC Handbook.) However, the removal of Article in the 2014 revision cycle, has caused some confusion about the conditions under which that practice is acceptable. The intent of this proposal is clarify those conditions. Since requires that the generator be provided with identified (listed) overcurrent protection, the exception is not needed, because either there is a single set of conductors to serve one or more downstream devices; or, there are multiple downstream protective devices, and the conductors will be sized based on the downstream device rating. The exception sometimes leads authorities to require 100% rated conductors (based on the generator rating) to very small downstream loads, which is generally impractical and totally unnecessary. Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Tue Nov 04 05:18:21 EST 2014 Panel 13 FD Agenda page 49

74 386 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Protection of Live Parts. Live parts of generators operated at more than 50 actual volts to ground shall not be exposed to accidental contact where accessible to unqualified persons. This section uses a voltage that is an "actual" hard limit. Refer to the substantiation for 1902 for more information. Related Public Inputs for This Document Related Input Relationship Public Input No NFPA [Global Input] This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Fri Oct 17 15:55:57 EDT 2014 Panel 13 FD Agenda page 50

75 392 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Disconnecting Means Required for Generators. (A) Generators shall be equipped with a disconnect(s), lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: (1) Portable generators are cord- and plug-connected, or (2) Both of the following conditions apply: a. The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with The b. The generator is not arranged to operate in parallel with another generator or other source of voltage. (B) All installations shall have a remote manual stop station of a type to prevent inadvertent or unintentional operation located outside the room housing the prime mover, where so installed, or elsewhere on the premises where the prime mover is located outside the building. The remote manual stop station shall be labelled. For systems located outdoors, the manual shutdown shall be located external to the weatherproof enclosure. [110] The remote manual stop required by (B) shall meet the requirements of (A)2.a. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies. The additional disconnect installation requirements extracted from NFPA 110 should be part of to alert installers of the additional requirements that are often overlooked. Often building or fire officials designated as the AHJ for NFPA 110 will sight the NFPA 110 violation at the end of the job when the owner is trying to get a final sign off and occupy the building. It's appropriate to correlate and include this installation rule in Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Fri Oct 31 07:01:00 EDT 2014 Panel 13 FD Agenda page 51

76 389 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Disconnecting Means Required for Generators. Generators shall be equipped with a disconnect(s), lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: (1) Portable generators are cord- and plug-connected, or (2) Both of the following conditions apply: a. The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with The b. The generator is not arranged to operate in parallel with another generator or other source of voltage. Exception to b. : Where generators are arranged to operate in parallel and the system design is under engineering supervision, the disconnecting means shall be allowed to be located remote from the generator location if all of the following conditions are met: a. The individual generator disconnects are integral with the paralleling equipment. b. The individual generator disconnects isolate the feeder conductors from the generator and the common paralleling bus. c. The individual generator disconnects are electrically operated and are electrically interlocked to open when the generator shuts down. d. Reverse power relay protection is provided integral with the paralleling breaker or the generator control. e. The generator is equipped with a disconnecting means as described in (2).a. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies. Arranging generators to operate in parallel is becoming common practice for hospitals, data centers, and large buildings requiring on site back-up power. Electrically operated circuit breakers connect multiple generators to a common switchboard bus. They open and close via PLC commands. They close to the common bus when the generators are electrically synchronized, and open when the generator shuts down or when commanded by the PLC for any pre programmed sequence or adverse condition in the system. Requiring the generators to be equipped with additional disconnects is not consistant with a typical design and does not meet the intent of the rule which is, to not allow generators connected to a common bus to backfeed a generator that is not running. Some juristictions require an additional disconnect at the generator location which is not electrically operated, redundant, and adds excessive cost for the owner. If the generator engine overheats, throws a rod, or stops for any reason the paralleling breaker in the paralleling switchboard, which is electically interlocked with the equipment, will open. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Added text to the same section Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Panel 13 FD Agenda page 52

77 391 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Disconnecting Means Required for Generators. Generators shall be equipped with a disconnect(s), lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: (1) Portable generators are cord- and plug-connected with a maximum number of six disconnects, or (2) Both of the following conditions apply: (3) The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with (4) The generator is not arranged to operate in parallel with another generator or other source of voltage. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies. Additional Proposed Changes File Name Description Approved DSC01060.JPG cam locks DSC01017.JPG cam lock 2 tapbox-4000-new_60693_zoom.jpg tap box pin and sleeve connection the use of cam locks to provide this cord and plug connection should not exceed the industries standard, six motions of the hand rule. which provides a reasonable time in which too disconnect the building from its power supply. Submitter Full Name: Alfio Torrisi Organization: master electrician Submittal Date: Thu Oct 30 18:56:13 EDT 2014 Panel 13 FD Agenda page 53

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81 387 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Disconnecting Means Required for Generators. A. Generators shall be equipped provided with a disconnect(s), lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: Portable generators are cord- and plug-connected, or Both of the following conditions apply: The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with The generator is not arranged to operate in parallel with another generator or other source of voltage means to simultaneously stop and prevent the engine from running by disabling the fuel fuel supply and starter, and disabling the excitation system. Operation shall render the machine incapable of restarting, and shall include the capability of being locked in the OFF position. A disconnecting means that opens generator conductors to the load shall not be required. Exception: Where the generator is portable and only supplies cord and plug connected loads, the disconnect means described in (A) is not requried. B. Generators that are arranged to operate in parallel with other generators shall include a device in the system to physically disconnect conductors from the generator to the generator paralleling system bus. This disconnecting device shall be allowed to be the paralleling device. 1. The paralleling device used to connect a generator to a bus for operation in parallel with other generators shall be interlocked with the disconnect means in Paragraph A to cause the paralleling device to open when the disconnect is operated. 2. The Paralleling device shall be capable of being locked in the OFF position. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies. 1. Generators are different from utility services in that in addition to providing for safe service of downstream devices, a means is required to prevent the generator set from unexpectedly starting and running while it is undergoing service. If an effective means of stopping the generator set and preventing its operation is provided, this also prevents the generator set from energizing downstream circuits; so these portions of the system are safe to work on. Note that this disconnect provision does not remove the potential requirements for other disconnects that may be required, particularly for outdoor generator set assemblies. ( B.6) 2. Some authorities have ruled that a generator main disconnect (usually in the form of a circuit breaker) is required to be mounted on the generator set because the phrase "generators shall be equipped with disconnects..." is in the code. This has led to potentially unsafe and unreliable installations where very large breakers or medium voltage breakers are physically installed on a generator package. These installations are nearly never prototype tested for vibration resistance and the ambient temperature conditions that are present in any generator installation. 3. For paralleling applications, the current text leads to a situation where a main breaker is often required by authorities at the generator set, and the paralleling device (again, nearly always a downstream power circuit breaker) provides for the isolation of the generator set from the bus when the generator is being serviced. The generator mounted breaker is generally a molded case device, but these devices are difficult to coordinate with downstream devices, which are commonly insulated case or power circuit breakers. So, using the revised paragraph A allows for disconnect means that is not a breaker or other device that requires overload protection, thus making the system inherently more reliable and actually safer than if more traditional designs are used. 4. The requirement for the paralleling device to include a lock-out/tag-out prevents the generator set from being energized from the bus when being serviced while the balance of the system is operating. For the generator to be safely worked on, paralleling applications require both the generator from being prevented from operation, and the bus from energizing the generator. 5. This requirement does not remove the requirement for identified overload protection at the generator, per the requirements of Panel 13 FD Agenda page 54

82 648 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Disconnecting Means Required for Generators. A. Individual. Generators shall be equipped with a disconnect(s), disconnecting means that is lockable in the open position by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where the following conditions apply: Portable generators OFF position in accordance with The disconnecting means shall readily shut down the driving means, disable the fuel supply and render the generator incapable of restarting. Exceptions: Portable generators that are cord- and plug-connected, orboth of the following conditions apply: The driving means for the generator can be readily shut down, is rendered incapable of restarting, and is lockable in the OFF position in accordance with The generator is not arranged to operate in parallel with another generator or other source of voltage B. Parallel Generators. In addition to the requirements in (A), when operated, the disconnecting means shall be interlocked to open the paralleling overcurrent device. Informational Note: See UL , Standard for Safety of Stationary Engine Generator Assemblies. The text in is confusing. The disconnecting means that is referred to in is the generator start/stop (mushroom) button and is not the circuit breaker that is located on the generator. Some AHJ's argue that the wording infers a fuse or breaker type device needs to be installed on the generator when actually this is not the intent of the section. Fuse or breaker type overcurrent devices are governed by and by the users choice in conductor size from the generator to the first overcurrent device. By revising the words, the user of the code will understand that 1. Each generator is to only have one disconnecting means. 2. Generators in parallel are not exempt from requiring a disconnecting means. 3. The disconnecting means is meant to disconnect the control circuit, the fuel supply and render the generator incapable of restarting. Circuit breaker type disconnects will not perform those functions and these changes will provide needed clarity for the industry. Submitter Full Name: Lawrence Ayer Organization: Biz Com Electric, Inc. Affilliation: Independent Electrical Contractors, Inc. Submittal Date: Mon Sep 22 21:25:39 EDT 2014 Panel 13 FD Agenda page 55

83 927 of /18/2014 2:46 PM Public Input No NFPA [ Chapter 4 [Title Only] ] Equipment for General Use Generators with full or trickle Battery Charging systems and Battery Heating pads/ panels shall be Ground-Fault Protection of Equipment. The Ground-Fault Protection of Equipment (GFPE) shall be located in the Generator controller,transfer Switch or at the Generator. Submitter Full Name: LARRY CROSS Organization: Medford NJ DCA Local 98 IBEW Submittal Date: Fri Oct 31 16:40:46 EDT 2014 Panel 13 FD Agenda page 56

84 395 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15-and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the (s) unless conditions (1) and (2) both apply. (1) The generator is equipped with a 125/250-volt single-phase locking-type receptacle is in use. If the generator does not have a. (2) The 125-volt, single-phase, 15-and 20-ampere receptacle outlets are not energized when the 125/250-volt locking-type receptacle, this requirement shall not apply is in use. Exception: A generator manufactured or remanufactured prior to January 1, 2015 shall be permitted to be used with listed cord sets or devices incorporating ground-fault circuit-interrupter protection for personnel identified for portable use in lieu of protection integral to the generator or receptacle(s). This input is an editorial improvement that does not substantively differ from the TIA that was released on this section. It contains the required locking receptacle requirement as positive text in a simple, two-item list. In so doing, it avoids the phrasing "this requirement shall not apply" because what actually does not apply is not a requirement but a permission to use the locking receptacle without the necessity of a bonded neutral during such use that would otherwise be required to make GFCI protection functional. It also frames the delayed compliance alternative as an exception for clarity. Submitter Full Name: Frederic Hartwell Organization: Hartwell Electrical Services, Inc. Submittal Date: Thu Nov 06 13:18:40 EST 2014 Panel 13 FD Agenda page 57

85 394 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15- and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the 125/250-volt locking-type receptacle volt receptacle is in use. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. Some of the portable generator 125/250V receptacles, especially those rated at 50A, are of the straight-blade variety and do not have a locking feature. When I submitted my original proposal in the last code cycle, I did not take this into consideration. Submitter Full Name: MICHAEL FLEGEL Organization: RELIANCE CONTROLS CORPORATION Submittal Date: Thu Nov 06 09:50:10 EST 2014 Panel 13 FD Agenda page 58

86 393 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15- and 20-ampere receptacle Receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have listed ground-fault circuit-interrupter protection (GFCI) for personnel integral to the generator or receptacle as indicated in either (A) or (B): (A) Unbonded (Floating Neutral) Generators. Unbonded generators with 125-volt and 125/250-volt receptacle outlets shall have listed GFCI protection for personnel, integral to the generator or receptacle, on all 125-volt, 15 and 20-ampere receptacle outlets. Exception: GFCI protection shall not be required where the 125-volt receptacle outlets(s) are interlocked such that they are not available for use when the any 125/250-volt locking-type receptacle is in use. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. receptacle outlet(s) are in use. (B) Bonded Neutral Generators. Bonded generators shall be provided with GFCI protection on all 125-volt, 15 and 20-ampere receptacle outlets. Informational Note: Refer to 590.6(A)(3) for GFCI requirements for 15-kW or smaller portable generators used for temporary electric power and lighting. This public input seeks to provide clarity by providing separate requirements for portable generators based upon whether or not the neutral is bonded. The new informational note is necessary to refer the user to supplemental requirements that impact portable generators used for temporary electric power and lighting. Submitter Full Name: James Dollard Organization: IBEW Local Union 98 Submittal Date: Mon Oct 27 07:57:33 EDT 2014 Panel 13 FD Agenda page 59

87 649 of /18/2014 2:46 PM Public Input No. 22-NFPA [ Section No ] Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15- and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the 125/250-volt locking-type receptacle is in use. If the generator was manufactured or remanufactured prior to January 1, 2015, listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. Additional Proposed Changes File Name Proposed_TIA_1117_70_.docx Description Approved Balloted TIA NOTE: This public input originates from Tentative Interim Amendment (Log 1117) issued by the Standards Council on October 22, 2013 and per the NFPA Regs. needs to be reconsidered by the Technical Committee for the next edition of the Document. On behalf of the Portable Genera tor Manufacturers Association, I am proposing a Tentative Interim Amendment (TIA) for NEC This proposed TIA is a successor to TIA Log No that was published in the May 2013 edition of NFPA News. It is directed towards a new section for NEC 2014, Section This new section originated as Proposal dur ing the proposal phase, and was modified by Comment dur ing the comment phase. This revised TIA takes into account the comments of CMP-13 members regarding correlation issues with TIA Log No The new Section will require the redesign of a majority of all portable generators sold in the United States. Given the structure and application of the NEC, as Sec tion is written, it would apply to the use of any 15 kw or smaller portable generator -- regardless of its date of manufacture -- under circumstances covered by the NEC. This (presumably unintended) retroactive application of the NEC effectively would ban the use of millions of portable generators that have been, and continue to be, used safely. To retroactively apply the NEC in this manner is uncharacteristic, and is an unfair, not to mention unnec essary, burden on consumers, trades people and society as a whole, particularly given the complete lack of historical electrical shock incident data to support the requirement in the first instance. The proposed TIA, if accepted, would allow the continued use of existing portable generators by allowing the use of external GFCI devices to provide equivalent protection. It would not be the first time that a new NEC section has (a) expressly indicated that it should not be applied retroactively and (b) provided a lead time for design com pliance. Rather, a precedent for the proposed TIA was set during the NEC 2011 code making cycle when Proposal for Sec-tion was accepted in principle by Code-Making Panel 3. Specifically, Proposal (and what eventually became Section 590.6(A)(3)) provided an alternative means of compliance for gen erators manufactured prior to the effective date of the 2011 NEC. It is noteworthy that Code-Making Panel 3 recognized the problem surrounding retroactive applicability and therefore modified the original proposal to add an effectivity date. The last paragraph of the Panel Statement from Code-Making Panel 3 stated: The revisions to the wording also clarified the requirements for GFCI protection on 15 kw or less portable generators, with information added, that will ensure that this require ment does not apply to manufactured or remanufactured gen erators prior to January 1, Section 590.6(A)(3) states (3) Receptacles on 15 kw or less Portable Generators. All 125-volt and 125/250-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets that are a part of a 15 kw or smaller portable generator shall have listed ground-fault circuit interrupter protection for personnel. Listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted for use with 15kW or less portable generators manufactured or remanufactured prior to January 1, Panel 13 FD Agenda page 60

88 NFPA National Electrical Code TIA Log No Reference: Comment Closing Date: September 9, 2013 Submitter: Joseph Harding, PGMA 1. Revise to read as follows: Ground-Fault Circuit Interrupter Protection for Receptacles on 15 kw or Smaller Portable Generators. All 125-volt, single-phase, 15-and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the 125/250-volt locking-type receptacle is in use. If the generator was manufactured or remanufactured prior to January 1, 2015, listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. Submitter s Substantiation: On behalf of the Portable Generator Manufacturers Association, I am proposing a Tentative Interim Amendment (TIA) for NEC This proposed TIA is a successor to TIA Log No that was published in the May 2013 edition of NFPA News. It is directed towards a new section for NEC 2014, Section This new section originated as Proposal during the proposal phase, and was modified by Comment during the comment phase. This revised TIA takes into account the comments of CMP-13 members regarding correlation issues with TIA Log No The new Section will require the redesign of a majority of all portable generators sold in the United States. Given the structure and application of the NEC, as Section is written, it would apply to the use of any 15 kw or smaller portable generator -- regardless of its date of manufacture -- under circumstances covered by the NEC. This (presumably unintended) retroactive application of the NEC effectively would ban the use of millions of portable generators that have been, and continue to be, used safely. To retroactively apply the NEC in this manner is uncharacteristic, and is an unfair, not to mention unnecessary, burden on consumers, trades people and society as a whole, particularly given the complete lack of historical electrical shock incident data to support the requirement in the first instance. The proposed TIA, if accepted, would allow the continued use of existing portable generators by allowing the use of external GFCI devices to provide equivalent protection. It would not be the first time that a new NEC section has (a) expressly indicated that it should not be applied retroactively and (b) provided a lead time for design compliance. Rather, a precedent for the proposed TIA was set during the NEC 2011 code making cycle when Proposal for Section was accepted in principle by Code-Making Panel 3. Specifically, Proposal (and what eventually became Section 590.6(A)(3)) provided an alternative means of compliance for generators manufactured prior to the effective date of the 2011 NEC 1. It is noteworthy that Code-Making Panel 3 recognized the problem surrounding retroactive applicability and therefore modified the original proposal to add an effectivity date. The last paragraph of the Panel Statement from Code-Making Panel 3 stated: The revisions to the wording also clarified the requirements for GFCI protection on 15 kw or less portable generators, with information added, that will ensure that this requirement does not apply to manufactured or remanufactured generators prior to January 1, Section 590.6(A)(3) states (3) Receptacles on 15 kw or less Portable Generators. All 125-volt and 125/250-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets that are a part of a 15 kw or smaller portable generator shall have listed ground-fault circuit interrupter protection for personnel. Listed cord sets or devices incorporating listed ground-fault circuit-interrupter protection for personnel identified for portable use shall be permitted for use with 15kW or less portable generators manufactured or remanufactured prior to January 1, 2011.

89 Like Proposal 3-140, the proposed TIA makes clear that the new section should not be retroactively applied, as long as external GFCI devices that provide equivalent protection are used. The proposed TIA suggests a slightly longer lead time than that which Code-Making Panel 3 allowed when Proposal was accepted in principle, but there is good reason for a longer lead time in this instance. The addition of Section will require all generators that feature a 125/250 volt locking-type receptacle, regardless of intended use or applicability to have GFCI protection on the 125 volt 15/20 amp outlets. This will require manufacturers to redesign a wide range of existing product. This broad scale design change merits a longer lead time (of an additional year) than that provided in Proposal Emergency Nature: PGMA and its members have determined that this proposed TIA is of an emergency nature requiring prompt action in accordance with 5.3 (a) and 5.3 (f) of the NFPA Regulations Governing Committee Projects, which are copied below: 5.3 (a) The document contains an error or an omission that was overlooked during a regular revision process. 5.3 (f) The proposed TIA intends to correct a circumstance in which the revised document has resulted in an adverse impact on a product or method that was inadvertently overlooked in the total revision process, or was without adequate technical (safety) justification for the action. While your organization is reviewing the proposed TIA, we also encourage several grammatical corrections to Section , specifically that the four (4) commas identified above be removed. Not only are these commas unnecessary, they may lead to incorrect interpretations by those who rely on the code.

90 396 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Circuit-Interrupter Protection for Receptacles on 15-kW or Smaller Portable Generators. All 125-volt, single-phase, 15- and 20-ampere receptacle outlets that are a part of a 15-kW or smaller portable generator either shall have ground-fault circuit-interrupter protection for personnel integral to the generator or receptacle or shall not be available for use when the 125/250-volt locking-type receptacle is in use. If the generator does not have a 125/250-volt locking-type receptacle, this requirement shall not apply. This requirement is problematic for the following reasons; 1. There already is a section in the NEC that is very similar to the requirements presented in The other article is 590.6(A)(3). Article 590.6(A)(3) is in the temporary wiring section of the NEC and that is the application that GFCI outlets on portable generators are most relevant to. Portable generator product is currently commercially available for temporary power generation at construction sites equipped with GFCI protected receptacles. Article is intended to apply to all portable generators except construction site temporary generators but it is in a section that applies to all portable generators. This creates a conflict between article and 590.6(A)(3). Article should be eliminated. 2. Portable generators are typically used in one of 2 applications. Supplying loads plugged into the outlets on the generator and supplying loads of a fixed wiring system that are connected via a twistlock outlet and transfer switch. When a portable generator is used for supplying loads plugged into outlets on the generator the neutral conductor should be bonded to the generator frame and the frame connected to a grounding electrode. If this is not done the GFCI will not function properly due the lack of a ground return path. In this case two faults are required for the GFCI to trip. Creating a grounding electrode is problematic by having to drive a ground rod. Many times a generator is called into use during a thunderstorm, ice storm or at times when the ground is frozen. Any of the previous conditions will lead to an improper installation. Furthermore, driving a 6 or 8 foot ground rod is not a good idea without identifying what hazards, in the form of a buried utilities or other hazards, are below the ground. These situations all contribute to why a generator is rarely properly grounded in practice. Without the generator frame properly connected to a grounding electrode the GFCI is non-functional and does nothing to increase safety. When a portable generator is used for backup power of an existing electrical system, via a twistlock outlet, the neutral and frame of the generator should not be connected. If connected a parallel ground path exists which will lead to tripping of the GFCI device. Now that the requirement has been in place for a year or so it can be demonstrated that this nuisance tripping has occurred on a regular basis. Human nature is to bypass safety items that cause nuisance tripping. At the very least the customer will not be happy. Also, to be kept in mind is that these 2 operating conditions are to be achieved with the same portable generator. Changing the neutral bonding method in the field is problematic with unskilled personnel. In addition, adding this duplicate article does nothing to address unqualified personnel operating the generator, such as the average homeowner, trying to decipher the correct and safe way to apply a portable generator with a hurried approach. In addition the average homeowner is ignorant of the NEC and does not use the services of a qualified person (licensed electrician) to properly install the portable generator. This requirement is a product design standard and not a requirement of installation that the NEC should be. An improvement to the wording of article would be to require a "Listed cord sets or devices incorporating listed GFCI protection for personnel identified for portable use shall be permitted to meet this requirement." Submitter Full Name: JEFF JONAS Organization: GENERAC POWER SYSTEMS Affilliation: Generac Power Systems, Inc. Panel 13 FD Agenda page 61

91 374 of /18/2014 2:46 PM Public Input No NFPA [ New Article after 445 ] (?) Generator(s) Operated in Parallel with Other Sources Where a generator is operated in parallel with other source(s) to provide power to common loads in a facility, the common bus between the sources shall be considered to be the source of power for those loads. 1. When generators are operated in parallel as a separately derived system, there must be only one neutral to ground bond in the system. However, when each generator is considered a source, the obvious (but incorrect) conclusion will be that each generator should have a neutral to ground bond. The consequence of this is often ineffective ground fault protection for the system and a potential for nuisance tripping of the ground fault system due to temporary imbalances in the load sharing control system. 2. If the source of the system is the bus, then required ground fault protection will be located on feeders connected to the bus, rather than the generator sets. So, ground fault protection can easily discriminate between more critical and less critical loads and would not disable the system for a downstream fault and critical loads such as fire pumps and emergency circuits can be alarmed, while less critical circuits can be tripped, resulting overall better protection for less critical systems, and better reliability for critical circuits. 3. In parallel applications it is not uncommon for the generator paralleling breakers (the breaker or device that connects the generator to the common bus) to be smaller than some of the feeders on the bus. This technically makes selective coordination of the system impossible to attain. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 12:12:34 EDT 2014 Panel 13 FD Agenda page 62

92 375 of /18/2014 2:46 PM Public Input No NFPA [ New Article after 445 ] Power Inlets Power inlets, rated 100Amps or greater, used for the connection of a portable generator set shall be equipped with an interlocked disconnecting means at the point of connection to prevent disconnection under load. Exception 1: If the inlet device is rated as a disconnect Exception 2: Supervised industrial installations where permanent space is identified for the portable generator located within line of site of the power inlets shall not be required to have interlocked disconnecting means nor inlets rated as disconnects. Code Making Panel 13 during the NEC 2014 Cycle as part of Comment directed this submitter as follows: CMP 13 rejects this comment since this may impact equipment not originally considered in the proposal. The submitter is encouraged to develop proposals in the next NEC cycle to incorporate this concept for the connection of portable generators to premises without regard to the type of system. Furthermore, any proposed text should address all levels of ampacity and types of equipment that may be impacted. This proposal is designed to address the request of the panel. Instead of multiple proposals, Section 445 was chosen to ensure no regard of the type of system was given. In addition, during the 2014 cycle a Technical Committee member showed a picture of an industrial installation where the inlets were directly adjacent to an area specifically designated for the portable generator. That issue was not intended to be covered by this submitter and so the comment was rejected rightfully so by the committee. The exception for supervised industrial will address this issue. As stated in previous proposals during the NEC 2014 cycle, a portable generator can be out of line of site from the point at which it electrically connects through a permanently installed inlet. If a person cannot visibly see the generator to which it is connected, disconnecting under load can present a safety hazard if the inlet is not rated for load break. The intent of the proposal is to either require: a. Inlets to be load break rated (There are inlet load-break solutions on the market for applications above 100 Amps. This proposal will help ensure the solution is a safe one for portable generators.) or b. Require the power inlet be interlocked via a disconnect to ensure that the disconnect is opened prior to disconnecting. This would prevent someone from disconnecting a non-load break device under load. The proposal acknowledges the fact that devices up to 60 amps can be rated as a disconnecting means. There are also solutions on the market that advertise load-break capabilities above 100Amps. This proposal aims to ensure the right solution is provided for the application. Related Public Inputs for This Document Related Input Public Input No NFPA [New Section after (A)] Relationship Submitter Full Name: Thomas Domitrovich Organization: Eaton Corporation Affilliation: Eaton Corporation Submittal Date: Fri Nov 07 09:34:11 EST 2014 Panel 13 FD Agenda page 63

93 423 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Marking. Each phase converter shall be provided with a permanent nameplate indicating the following: (1) Manufacturer s name (2) Rated input and output voltages (3) Frequency (4) Rated single-phase input full-load amperes (5) Rated minimum and maximum single load in kilovolt-amperes (kva) or horsepower (6) Maximum total load in kilovolt-amperes (kva) or horsepower (7) For a rotary-phase converter, its 3-phase base amperes at full load Original intent of Claude Hertz, who helped develop this section, was to have this for sizing wire for the rotary base unit, not the output of the converter. It is not always needed, as some prewire their capacitors and base units, but not all are. We, Ronk Electrical Industries, have put rotary 3-phase base amps on our nameplate since this section was developed. Output is a function of connected load, and in that respect, is already covered on the nameplate by the maximum total HP. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 15:27:53 EDT 2014 Panel 13 FD Agenda page 64

94 424 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Equipment Grounding Bonding Connection. A means for attachment of an equipment grounding bonding conductor termination in accordance with shall be provided. The term equipment grounding conductor is a misnomer even though it has been in use for many many years. Although it is a grounded conductor in normal practice for grounded systems, the idea that grounding makes a system safe and prevents an electrical shock is inherently false. Connecting a conductor from metallic equipment likely to become energized to the earth does not reduce the shock potential during a fault but, rather, may enhance it if it becomes the only path back to the source. The shock potential is the voltage drop along the conductor (equipment grounding conductor) due to fault current flowing back to the source. The shock hazard depends upon the time until the fault is cleared by an overcurrent device or some other event, thus the clearing time is a critical factor in safety. This conductor (equipment grounding conductor) is intended to protect equipment and personnel by providing a sufficiently high fault current to operate an overcurrent device and clear the fault rapidly. A low impedance fault current path can provide the necessary high fault current regardless of whether the conductor is grounded or not. It is only the fault current path and not the grounding that can provide the high fault current necessary to operate an overcurrent device rapidly. The term bonding is generally used to insure that a connection and current path is low impedance, reliable, and able to withstand the fault current. This conductor provides a basic bonding function by insuring, through proper sizing and bonding jumpers as necessary, that the connection from equipment to fault current source is both low impedance and reliable. A bonding function is the necessary function rather than a grounding function to clear a fault rapidly. A grounding function is provided by a grounding electrode conductor that connects an electrical system source to the earth. An overcurrent device operates in a time interval based upon the current through it. That current depends upon proper bonding to the source and is relatively independent of connection to the grounding electrode at the source where the overcurrent device is located. The use of the term equipment bonding conductor would better describe the function of this important conductor instead of the term equipment grounding conductor. Systems are grounded, equipment is bonded. Making this change would also bring the NEC into conformity with the Canadian Electrical Code which uses the term equipment bonding conductor. Code Panel 5 members have often stated that those in the industry understand what the purpose of the equipment grounding conductor is for. The Panel members understand this also. There are, however, many people doing electrical work who don t understand and think connecting equipment to a local grounding electrode accomplishes the same objective as an equipment grounding conductor. This is apparent from the large number of questions that are asked at IAEI inspectors meetings, grounding classes, and as documented recently in the July/August 2014 issue of the NFPA Journal under the title Pool Rules. Just ask the inspectors and the teachers. Changing the terminology will serve to make it clear that the principal function of this conductor is to bond the equipment being protected to the source where the fault current originates. Changing the terminology will not confuse those that understand the proper purpose of this bonding conductor. Submitter Full Name: ELLIOT RAPPAPORT Organization: ELECTRO TECHNOLOGY Submittal Date: Tue Oct 28 11:20:32 EDT 2014 Panel 13 FD Agenda page 65

95 425 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Ampacity. The ampacity of the single-phase supply conductors shall be determined by 455.6(A) (1) or, (A 2), or (2 3). Informational Note: Single-phase conductors sized to prevent a voltage drop not exceeding 3 percent from the source of supply to the phase converter may help ensure proper starting and operation of motor loads. (1) Variable Loads. Where the loads to be supplied are variable, the conductor ampacity shall not be less than 125 percent of the phase converter nameplate single-phase input full-load amperes. (2) Fixed Loads. Where the phase converter supplies specific fixed loads, and the conductor ampacity is less than 125 percent of the phase converter nameplate single-phase input full-load amperes, the conductors shall have an ampacity not less than 250 percent of the sum of the full-load, 3-phase current rating of the motors and other loads served where the input and output voltages of the phase converter are identical. Where the input and output voltages of the phase converter are different, the current as determined by this section shall be multiplied by the ratio of output to input voltage. (3) Static Type Phase Converters. The conductor ampacity shall not be less than 125% of the phase converter nameplate single-phase full-load amperes. Static phase converters in practice operate what could be considered fixed loads, but the definition of fixed loads here relates to a rotary converter connected to a single load that may be below the connected to a converter rated for more total load than that. Clarifies statics should be only wired for nameplate FLA. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 17:08:43 EDT 2014 Panel 13 FD Agenda page 66

96 426 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) [Excluding any Sub-Sections] ] The ampacity of the single-phase supply conductors shall be determined by 455.6(A) (1) or, (A)(2) or (A)(3). Informational Note: Single-phase conductors sized to prevent a voltage drop not exceeding 3 percent from the source of supply to the phase converter may help ensure proper starting and operation of motor loads. Accounts for A3 being added for static converters. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 16:31:53 EDT 2014 Panel 13 FD Agenda page 67

97 427 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A)(1) ] (1) Multiple/ Variable Loads on rotary type converters. Where the loads to be supplied are variable, the conductor ampacity shall not be less than 125 percent of the phase converter nameplate single-phase input full-load amperes. Clarifies that variable means multiple loads on a rotary converter. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 15:52:53 EDT 2014 Panel 13 FD Agenda page 68

98 428 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A)(2) ] (2) Fixed Loads on rotary type converters. Where When the rotary type phase converter supplies specific fixed loads, and the conductor ampacity is may be less than 125 percent of the phase converter nameplate single-phase input full-load amperes but, the conductors shall have an ampacity not less than 250 percent of the sum of the full-load, 3-phase current rating of the motors and other loads served where the input and output voltages of the phase converter are identical. Where the input and output voltages of the phase converter are different, the current as determined by this section shall be multiplied by the ratio of output to input voltage. Clarifies that fixed load applies to rotary converters. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 15:58:12 EDT 2014 Panel 13 FD Agenda page 69

99 429 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Overcurrent Protection. The single-phase supply conductors and phase converter shall be protected from overcurrent by 455.7(A) or, (B), or (C). Where the required fuse or nonadjustable circuit breaker rating or settings of adjustable circuit breakers do not correspond to a standard rating or setting, a higher rating or setting that does not exceed the next higher standard rating shall be permitted. (A) Variable Loads. Where the loads to be supplied are variable, overcurrent protection shall be set at not more than 125 percent of the phase converter nameplate single-phase input full-load amperes. (B) Fixed Loads. Where the phase converter supplies specific fixed loads and the conductors are sized in accordance with 455.6(A) (2), the conductors shall be protected in accordance with their ampacity. The overcurrent protection determined from this section shall not exceed 125 percent of the phase converter nameplate single-phase input amperes. (C) Static Type Phase Converters. The overcurrent protection shall be set at not more than 175% of the phase converter nameplate single-phase input full-load amperes. Adds static converters as previously and allows OCP to be picked more like 430, where 175% max allowed. This will account for motors operating in SF where nuisance trips could occur if only 125% max allowed & for circumstances with autotransformer types operating high P.F. motors where they actually have a leading P.F> on the single-phase and exceed they're FLA rating that is based on unity P.F.. Could also apply to the variable load rotary. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 17:22:28 EDT 2014 Panel 13 FD Agenda page 70

100 430 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Multiple/ Variable Loads on rotary type converters. Where the loads to be supplied are variable, overcurrent protection shall be set at not more than percent of the phase converter nameplate single-phase input full-load amperes. Better matches OCP rules for 430, allowing 175% max, in case motors are operating in SF, etc. which could cause nuisance trips at 125% max. Submitter Full Name: Pat Gaffney Organization: Ronk Elect Ind Inc Submittal Date: Tue Oct 07 15:39:06 EDT 2014 Panel 13 FD Agenda page 71

101 436 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article shall apply to all stationary installations of storage batteries. Informational Note: The following standards are frequently referenced for the installation of stationary batteries: (1) IEEE , Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary Applications (2) IEEE , Recommended Practice for Sizing Vented Lead-Acid Storage Batteries for Stationary Applications (3) IEEE , Recommended Practice for Installation and Maintenance of Nickel-Cadmium Batteries for Photovoltaic (PV) Systems (4) IEEE , Recommended Practice for Installation Design, and Installation of Valve- Regulated Lead-Acid Batteries for Stationary Applications (5) IEEE (Rev. 2003), IEEE Guide for the Protection of Stationary Battery Systems (6) IEEE , Recommended Practice for Stationary Battery Spill Containment and Management (7) IEEE 1635/ASHRAE , Guide for the Ventilation and Thermal Management of Stationary Battery Installations (8) IEEE P Recommended Practice for the Application of Stored-Energy Systems for use in Emergency and Stand-By Power Systems Storage battery specification, system design, installation and operation should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Wed Nov 05 08:59:49 EST 2014 Panel 13 FD Agenda page 72

102 435 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article shall apply to all stationary installations of storage batteries. Informational Note: The following standards are frequently referenced for the installation of stationary batteries: (1) IEEE , Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary Applications (2) IEEE , Recommended Practice for Sizing Vented Lead-Acid Storage Batteries for Stationary Applications (3) IEEE , Recommended Practice for Installation and Maintenance of Nickel-Cadmium Batteries for Photovoltaic (PV) Systems (4) IEEE , Recommended Practice for Installation Design, and Installation of Valve- Regulated Lead-Acid Batteries for Stationary Applications (5) IEEE (Rev. 2003), IEEE Guide for the Protection of Stationary Battery Systems (6) IEEE , Recommended Practice for Stationary Battery Spill Containment and Management (7) IEEE 1635/ASHRAE , Guide for the Ventilation and Thermal Management of Stationary Battery Installations (8) UL 1973, Batteries for Use in Light Electric Rail (LER) Applications and Stationary Applications (9) UL Subject 2436, Spill Containment for Stationary Lead Acid Battery Systems (10) UL 1989, Standby Batteries UL 1973 is an ANSI standard covering safety of stationary battery systems. It is non chemistry specific and includes lead acid and nickel chemistries as well as less traditional chemistries such as lithium ion, sodium beta and flow batteries. UL Subject 2436 is an outline covering safety of spill containment systems and addresses material compatibility, flame spread, electrolyte neutralization and absorption as well as containment of electrolyte. UL 1989 is an ANSI safety standard covering tests for valve regulated and vented lead acid and nickel batteries. Submitter Full Name: Laurie Florence Organization: UL LLC Submittal Date: Tue Nov 04 12:19:50 EST 2014 Panel 13 FD Agenda page 73

103 437 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] Equipment For chemistries other than lead-acid, storage batteries and battery management systems shall be listed for the application. Article 480 presently covers all stationary installations of storage batteries. The safety of many traditional installations of storage batteries, for example rooms incorporating lead-acid batteries, have been adequately addressed with the requirements of Article 480. However, as new battery chemistries and technologies such as lithium-ion have been introduced, important new potential hazards have emerged. Through the use of new technologies, energy density has significantly increased and continues to increase; for example, for lithium-ion battery energy density has been increasing at approximately 10% annually through technological advances such as reduced separator thicknesses. These new battery technologies are quite different than lead-acid batteries, and these differences have produced both new functional benefits along with challenges that have caused some notable safety incidents involving significant fires and explosions. In reviewing the root causes of these incidents, it is clear that thorough investigation of the battery as well as the battery management system (which manages battery thermal and/or electrical processes) plays a critical role in mitigating incidents. Established American National Standards address safety of storage batteries in a comprehensive manner. Other new challenges are now being introduced as electric vehicle batteries are being repurposed at the end of their vehicular life into stationary applications; in these cases each battery has its own unique state of health as it enters its second life in the stationary domain. As a large scale deployment of energy storage is completed over the next few years, it is critical that we promote the safety of stationary battery equipment by leveraging the benefits of listing. Submitter Full Name: Kenneth Boyce Organization: UL LLC Submittal Date: Tue Nov 04 14:38:36 EST 2014 Panel 13 FD Agenda page 74

104 438 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Dissimilar Metals Corrosion Prevention. Where mating dissimilar metals, antioxidant material suitable for the battery connection shall be used when recommended by the battery manufacturer. Informational Note: The battery manufacturer s installation and instruction manual can be used for guidance for acceptable materials. Delete reference to dissimilar metals and replace with corrosion prevention as that is what the subject is really about. It is not realistic for the AHJ to determine if dissimilar metals are present. Not all batteries, especially those with spade terminals, require antioxidant. Amtoxidant grease should only be used when recommended by the battery manufacturer. Some antioxidant materials can actually damage battery containers (cases). The informational note reminds the reader to use only substances acceptable to the battery manufacturer. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 13:25:40 EDT 2014 Panel 13 FD Agenda page 75

105 439 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Battery Terminals. Electrical connections to the battery, and the cable(s) between cells on separate levels or racks, shall not put mechanical strain on the battery terminals. Terminal plates shall be used where practicable. Informational Note: Conductors are commonly pre-stressed. Refer to the manufacturer s instructions for guidance. Fine stranded cables are generally preferred for their flexibility. Add a new Informational Note. Rigidity between units in a battery system can cause damage to the posts and containers. Fine stranded cables (a.k.a. welding cables) are widely used in the industry to provide needed flexibility. Proper crimping is necessary, and should follow the manufacturer s guidance. Some factory-made connectors are pre-stressed. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 17:00:35 EDT 2014 Panel 13 FD Agenda page 76

106 440 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] TITLE OF NEW CONTENT (1) Insulation type The following types of cable insulation shall be permitted for battery wiring: RHH, RHW, XHHW, DLO (RHH/RHW), THHN, THWN, THW (2) Stranding - All stranded conductors, when used, shall be Class B (aka Code stranding see Chapter 9, Table 8), Class I, or Class K (sometimes called welding cable or Class W) Informational Note: It is widely known that the direct current does not heat the cable insulation to the same degree as alternating current due to skin effect. Due to lack of data on the exact values, the more conservative approach is to use the ac ampacities listed in the code. (A) The Code does not specifically refer to DLO cable; however, DLO cable (which is commonly used in battery applications) that has been tested and approved as RHH/RHW should be allowed (B) Chapter 9, Table 8, formally lists Class B stranding; however, Class I and Class K are commonly used in battery applications due to the needed flexibility. Submitter Full Name: Stephen McCluer Organization: Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Nov 03 18:58:44 EST 2014 Panel 13 FD Agenda page 77

107 652 of /18/2014 2:46 PM Public Input No. 302-NFPA [ New Section after ] 480.4(A) Battery Conductors. The ampacity of field-assembled conductors from the battery terminals to the disconnecting means, overcurrent protection and load(s) shall be of such cross-sectional area that the temperature rise under maximum load conditions at maximum ambient temperatures shall not exceed the safe operating temperature of the conductor insulation or termination rating. For battery full load runtimes equal to or less than 60 minutes refer to Table (A) for the Ampacities of Insulated Copper Conductors Used for Short-Time Applications with up to 4 energized conductors in a raceway. For battery full load runtimes greater than 60 minutes or conductors in free air refer to for the Ampacities for Conductors Rated Volts for continuous current applications. Informational Note: Larger conductor sizing may be required to reduce voltage drop. See the 480.3(B) Informational Note for conductor sizing due to voltage drop. The current wording leads to significant oversizing of the conductors associated with storage battery systems used in short back-up time applications such as UPS systems where the battery runtime at full load is typically 5 to 30 minutes. In these applications, wire sizing based on the continuous current rating of the conductors is inappropriate since the energy stored in a given battery system is limited and cannot support full load continuously as defined by the code. Battery recharge currents for short-time rated battery systems are not a conductor sizing concern since the recharge currents are only 5 to 25% of the discharge current ratings and decrease to float current levels as the battery recharges. Table (A) already defines the short time ampacity of conductors with up to 4 conductors in a raceway. Referring to this table for those applications with the battery sized for less than 60 minutes of full load runtime will result in more appropriately sized conductors. The disparity in the sizing of conductors is apparent when comparing the size of the conductors supplied as part of UL listed battery systems and battery cabinets to the size of fieldassembled conductors that are selected based on the conductor continuous current ratings. This is a waste of materials with unnecessary increased costs. For example for a 15 minute full load discharge battery system with an 800 Amp battery overcurrent device having 75C terminations would require parallel 600 kcmil conductors per polarity based on the continuous current rating whereas based on the 30 minute ampacities shown in Table (A) would result in a selection of parallel 250 kcmil conductors per phase. Per the informational note, the conductor size may need to be increased to control the total voltage drop. Most practical applications would result in a conductor size somewhere between these two selections. Submitter Full Name: THOMAS GRUZS Organization: EMERSON NETWORK POWER Submittal Date: Tue Feb 25 17:18:10 EST 2014 Panel 13 FD Agenda page 78

108 Public Input No NFPA [ Sections 480.5, ] Sections 480.5, Overcurrent Protection for Prime Movers. Overcurrent protection shall not be required for conductors from a battery with a nominal voltage of volts or less if the battery provides power for starting, ignition, or control of prime movers. Section shall not apply to these conductors DC Disconnect Methods. (A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over volts. A disconnecting means shall be readily accessible and located within sight of the battery system. Informational Note: See (H) for information on the location of the overcurrent device for battery conductors. (B) Remote Actuation. Where controls to activate the disconnecting means of a battery are not located within sight of a stationary battery system, the disconnecting means shall be capable of being locked in the open position, in accordance with , and the location of the controls shall be field marked on the disconnecting means. (C) Busway. Where a DC busway system is installed, the disconnecting means shall be permitted to be incorporated into the busway. (D) Notification. The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the battery if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: (1) Nominal battery voltage (2) Maximum available short-circuit current derived from the stationary battery system (3) Date the calculation was performed Informational Note: Battery equipment suppliers can provide information about short-circuit current on any particular battery model. Code Panel 13 changed the text in section 480 from 60 volts to 50 volts nominal in the 2014 code cycle. When reviewing the DC voltage demarcation every single other section of the code that refers to DC does so at 60 volts. For instance section indicateds 60 volts dc when discussing working space clearances. Section requires DC systems greater than 60 volts dc to be grounded (A) Suspended DC Ceiling grids shall be listed as complete systems for 60 volts dc or less. Article 620 talks about uninsulated low voltage parts at 60 volts dc or less. Article 640 deals with separately derived dc systems at 60 volts dc or less. There are many other sections which refer to 60 volts or less dc. I would recommend that the 60 volt level be returned or a task group be formed to chose one level throughout the code in order to be consistent. Submitter Full Name: Lawrence Ayer Organization: Affilliation: Biz Com Electric, Inc. Independent Electrical Contractors Submittal Date: Mon Nov 03 21:54:45 EST 2014 Panel 13 FD Agenda page of /18/2014 2:46 PM

109 653 of /18/2014 2:46 PM Public Input No. 685-NFPA [ Section No (A) ] (A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over 50 volts. A disconnecting means shall be readily accessible and located within sight of the battery system. The disconnecting means shall be permitted to be located with the overcurrent protection, not in sight of the battery system, if the disconnecting means is lockable in the off position. Informational Note: See (H) for information on the location of the overcurrent device for battery conductors. The change provides better coordination with (H). Submitter Full Name: Billy Breitkreutz Organization: Fluor Corporation Affilliation: self Submittal Date: Mon Jun 09 12:54:37 EDT 2014 Panel 13 FD Agenda page 80

110 442 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over 50 over 100 volts. A disconnecting means shall be readily accessible and located within sight of the battery system. Informational Note: See (H) for information on the location of the overcurrent device for battery conductors. Peak voltages of 120 Vac power appearing on the wall sockets in United States homes have a peak value of approximately 170 volts There is ample data to substantiate that 100 Vdc is a reasonable electric threshold for direct current, in which peak and rms voltage are essentially the same. Numerous papers support that the shock threshold for dc is at least twice that for 50Hz or 60 Hz alternating current. See NFPA 70E Article 340 and Table 130.4(C)(b), and NFPA 70E Handbook Article 340. The definitive technical research paper on the effects of electricity on the human body is IEC/TR , Effects of current on human beings and livestock Part 5: Touch voltage threshold values for physiological effects. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 17:15:38 EDT 2014 Panel 13 FD Agenda page 81

111 443 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Remote Actuation. Where controls to activate the disconnecting means of a battery system is comprised of multiple batteries or groups of batteries that are not located capable of independent activation and control from a location that is not within sight of a the stationary battery system, the system disconnecting means covered in 480.6(A) shall be capable of being locked in the open position, in accordance with , and the location of the controls shall be field marked on the disconnecting means. This input is editorial. It provides sufficient context so the substantiation presented at the time of its creation is not lost on Code users. Specifically, it clarifies the intended application to battery groupings as well as ingle batteries. In addition, it makes the distinction between the system disconnect that is for everything and the controls for the groups or even individual batteries will be capable of both activation and control from a potentially remote location. Submitter Full Name: Frederic Hartwell Organization: Hartwell Electrical Services, Inc. Submittal Date: Thu Nov 06 15:41:13 EST 2014 Panel 13 FD Agenda page 82

112 444 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) ] (D) Notification. The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the battery if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: (1) Nominal battery voltage (2) Maximum available short-circuit current derived Arc flash hazard derived from the stationary terminals of the stationary battery system (3) Date the calculation was performed Informational Note: Battery equipment suppliers can provide information about short-circuit current on any particular battery model. NFPA 70E provides guidance for notification of arch flash hazard due to the prospective short circuit current Bullet #2 is modified to be consistent with NFPA 70E. Maximum available short-circuit current does not provide useful information by itself. Delete the informational note as it is no longer necessary. Add a new informational note to refer to NFPA 70E for arc flash calculated at the battery disconnect, which is the point of greatest hazard. NFPA 70E, 320.3(A)(5) provides guidance for signage about arc flash for the entire battery system. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 17:20:51 EDT 2014 Panel 13 FD Agenda page 83

113 445 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Insulation of Batteries Not Over 250 Volts. This section shall apply to storage batteries having cells connected so as to operate at a nominal battery voltage of not over 250 volts. (A) Vented Lead-Acid Batteries. Cells and multi-cell batteries with covers sealed to containers of nonconductive, heat-resistant material shall not require additional insulating support. (B) Vented Alkaline-Type Batteries. Cells with covers sealed to containers of nonconductive, heat-resistant material shall require no additional insulation support. Cells in containers of conductive material shall be installed in trays of nonconductive material with not more than 20 cells (24 volts, nominal) in the series circuit in any one tray. (C) Rubber Containers. Cells in rubber or composition containers shall require no additional insulating support where the total nominal voltage of all cells in series does not exceed 150 volts. Where the total voltage exceeds 150 volts, batteries shall be sectionalized into groups of 150 volts or less, and each group shall have the individual cells installed in trays or on racks. (D) Sealed Cells or Batteries. Sealed cells and multicompartment sealed batteries constructed of nonconductive, heat-resistant material shall not require additional insulating support. Batteries constructed of a conducting container shall have insulating support if a voltage is present between the container and ground. Prior to 2014, Article 480 had two sections on Insulation of Batteries: one for batteries not over 250 volts and one for batteries over 250 volts. In 2014 the panel deleted the latter (which had added a requirement to physically segment a battery into 250 volt sections). Unfortunately, they failed to revise the text that remained. So today users and AHJ s are confused about what to do about batteries rated 250 volts and above. This PI removes the confusing language so that now applies to insulation of batteries of any voltage. Submitter Full Name: Robert Jensen Organization: dbi-telecommunication Infrastr Affilliation: BICSI Submittal Date: Fri Oct 03 16:23:06 EDT 2014 Panel 13 FD Agenda page 84

114 446 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Insulation of Batteries Not Over 250 Actual Volts. This section shall apply to storage batteries having cells connected so as to operate at a nominal battery voltage of not over 250 actual volts. (A) Vented Lead-Acid Batteries. Cells and multi-cell batteries with covers sealed to containers of nonconductive, heat-resistant material shall not require additional insulating support. (B) Vented Alkaline-Type Batteries. Cells with covers sealed to containers of nonconductive, heat-resistant material shall require no additional insulation support. Cells in containers of conductive material shall be installed in trays of nonconductive material with not more than 20 cells (24 actual volts, nominal) in the series circuit in any one tray. (C) Rubber Containers. Cells in rubber or composition containers shall require no additional insulating support where the total nominal voltage of all cells in series does not exceed 150 actual volts. Where the total voltage exceeds 150 actual volts, batteries shall be sectionalized into groups of 150 sctual volts or less, and each group shall have the individual cells installed in trays or on racks. (D) Sealed Cells or Batteries. Sealed cells and multicompartment sealed batteries constructed of nonconductive, heat-resistant material shall not require additional insulating support. Batteries constructed of a conducting container shall have insulating support if a voltage is present between the container and ground. This section uses voltages that are "actual" hard limits. Refer to the substantiation for 1902 for more information. Related Public Inputs for This Document Related Input Relationship Public Input No NFPA [Global Input] This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Fri Oct 17 16:10:42 EDT 2014 Panel 13 FD Agenda page 85

115 447 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Insulation of Batteries Not Over 250 Volts. This section shall apply to storage batteries having cells connected so as to operate at a nominal battery voltage of not over 250 volts. (A) Vented Lead-Acid Batteries. Cells and multi-cell batteries with covers sealed to containers of nonconductive, heat-resistant material shall not require additional insulating support. (B) Vented Alkaline-Type Batteries. Cells with covers sealed to containers of nonconductive, heat-resistant material shall require no additional insulation support. Cells in containers of conductive material shall be installed in trays of nonconductive material with not more than 20 cells (24 volts, nominal) in the series circuit in any one tray. (C) Rubber Containers. Cells in rubber or composition containers shall require no additional insulating support where the total nominal voltage of all cells in series does not exceed 150 volts. Where the total voltage exceeds 150 volts, batteries shall be sectionalized into groups of 150 volts or less, and each group shall have the individual cells installed in trays or on racks. (D) Sealed Cells or Batteries. Sealed cells and multicompartment sealed batteries constructed of nonconductive, heat-resistant material shall not require additional insulating support. Batteries constructed of a conducting container shall have insulating support if a voltage is present between the container and ground.. DELETE: (A) (B) (C) (D) as they no longer serve useful or enforceable guidance The circumstances for which these guidelines were originally created no longer exist. Batteries can have a conductive shell around the container(s), but no battery is made with conductive containers. Such a design would guarantee a short circuit. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 17:27:53 EDT 2014 Panel 13 FD Agenda page 86

116 Public Input No NFPA [ Section No (A) ] Metal, treated so as to be resistant to deteriorating action by the electrolyte and provided with nonconducting members directly supporting the cells or with continuous insulating material other than paint on conducting members Other construction such as fiberglass or other suitable nonconductive materials (A) Racks. Racks, as required in this article, are rigid frames designed to support cells or trays. They shall be substantial and be made of one of the following: Ground Fault Protection - Means shall be provided to prevent short circuit paths from the battery to a conductive surface. Informational note 1. One example of a short circuit path would be a leak of electrolyte to a metal rack or shelf. Even a dry and possibly invisible - electrolyte trace can be conductive Informational note 2. Common methods of protection include coating of racks, trays, or shelves with nonconductive and electrolyte-resistant paint, or the use of non-metallic construction such as composite or fiberglass material. The intent of existing (A) and (B) seems to be to prevent ground faults. Not all batteries are on racks or trays. The title is changed from Racks to Ground Fault Protection. The text is rewritten to use performance-based language versus prescriptive language. Two new informational notes are added to 480.8(A) to capture the intent of the original text. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (B)] Relationship Submitter Full Name: Stephen McCluer Organization: Affilliation: APC by Schneider Electric IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 17:33:09 EDT 2014 Panel 13 FD Agenda page of /18/2014 2:46 PM

117 449 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Trays. Trays are frames, such as crates or shallow boxes usually of wood or other nonconductive material, constructed or treated so as to be resistant to deteriorating action by the electrolyte. The intent of existing (A) and (B) seems to be to prevent ground faults. Not all batteries are on racks or trays (B) is informative; it has no enforceable requirements. It s intent is captured in a new Informational Note No. 2 in a companion public input #2642 for 480.8(A). If this PI is accepted, 480.8(C) will become 480.8(B) Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)] Relationship Substance of 480.8(B) is captured in proposed new informational note in 480.8(A) Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 18:45:05 EDT 2014 Panel 13 FD Agenda page 88

118 450 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Ventilation. Provisions appropriate to the battery technology shall be made for sufficient diffusion and ventilation of gases from the battery, if present, to prevent the accumulation of an explosive mixture. Informational Note No. 1: See NFPA 1, Fire Code, Chapter 52, for ventilation considerations for specific battery chemistries. Informational Note No. 2: Some battery technologies do not require ventilation. Informational Note No. 3: A source for design guidance for ventilation of battery systems is IEEE Std /ASHRAE Guideline Add a new Informational Note 3 to include a reference to IEEE Std. 1635/ASHRAE Guideline This standard was just being published when NEC 2014 proposal stage closed. Because it had not yet been published by the proposal deadline, reference to it was not included in the NEC. The document provides guidance for ventilation of various types of batteries in a variety of enclosures and operating conditions. The primary purpose of this guide is to assist users involved in the design and management of new stationary battery installations. The focus is the environmental design and management of the installation to maximize battery reliability as well as the safety of personnel and equipment. This guide was jointly developed by the IEEE and ASHRAE. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 18:52:26 EDT 2014 Panel 13 FD Agenda page 89

119 451 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Guarding Live Parts. Energized Conductive Components of live parts shall of energized conductors shall comply with This is an editorial change. In NEC 100, the definition of live parts refers you to the definition of energized conductive components. Submitter Full Name: Stephen McCluer Organization: Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Nov 03 19:08:34 EST 2014 Panel 13 FD Agenda page 90

120 452 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) ] (D) Top Terminal Batteries. Where top terminal batteries are installed on tiered racks or on shelves of battery cabinets, working space in accordance with the battery manufacturer s instructions shall be provided between the highest point on a cell and the row or, shelf or ceiling above that point. Informational Note: Battery manufacturer s installation instructions typically define how much top working space is necessary for a particular battery model. Informational note #2: IEEE 1187, provides guidance for top clearance of VRLA batteries, which are the most commonly used battery in cabinets. Text is modified to add battery cabinets, which is where the greatest hazards typically exist due to insufficient clearance for maintenance activities. A new informational note is added to reference IEEE 1187, in which section 5.2 recommends top clearances proportional to the depth of the cabinet. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Oct 27 19:00:40 EDT 2014 Panel 13 FD Agenda page 91

121 654 of /18/2014 2:46 PM Public Input No. 912-NFPA [ Section No (E) ] (E) Egress. A personnel door(s) intended for entrance to, and egress from, rooms designated as battery rooms shall open in the direction of egress and shall be equipped with listed panic and labeled panic hardware. By adding the words and labeled, it will identify that listed products also need to be labeled. Both terms listed and labeled are defined in article 100, but are not used consistently throughout the NEC. If taken literally, as defined in Article 100, a product could be listed and not labeled and still comply with the NEC when not required to be listed and labeled such as in sections 424.6, 646.3(I), and (C) to identify a few. The UL White Book identifies that only those products bearing the appropriate UL Mark and the company's name, trade name, trademark or other authorized identification should be considered as being covered by UL's Certification, Listing, Classification and Follow-Up Service. Therefore, if not identified within the UL Certification Directory as indicated in the definition of listed and bearing the appropriate UL mark as indicated in the definition of labeled the product is not considered by UL to be listed. This is not just UL; all of the test laboratories have a very similar requirement. This change will help make the NEC a more consistent document for AHJ s. Submitter Full Name: JEFFREY FECTEAU Organization: UNDERWRITERS LABORATORIES LLC Submittal Date: Thu Jul 24 19:05:53 EDT 2014 Panel 13 FD Agenda page 92

122 454 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Sealed Cells. Sealed battery or cells shall be permitted to be equipped with a pressure-release vent to prevent excessive accumulation of gas pressure, or the battery or cell shall be designed to prevent scatter of cell parts in event of a cell explosion. This public input adds permission. The present text requires a pressure release valve, which is typical primarily of VRLA cells. Sealed cells with non-aqueous electrolyte do not require a pressure release valve. The second clause is deleted because it has nothing to do with venting. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Tue Oct 28 12:28:40 EDT 2014

123 453 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Vented Cells. Each vented cell shall be equipped with a flame arrester that arrestor. Informational Note: A flame arrestor is designed to prevent destruction of the cell due to ignition of gases within the cell by an external spark or flame under normal operating conditions. Preferred spelling is "arrestor". An AHJ can verify that a flame arrestor is installed, but cannot determine whether the flame arrestor is properly designed. The last portion of the section is not enforceable and is moved to a new informational note. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Tue Oct 28 10:50:20 EDT 2014 Panel 13 FD Agenda page 93

124 837 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Not Covered. This article does not cover the following: (1) The performance, maintenance, and acceptance testing of the fire pump system, and the internal wiring of the components of the system (2) The installation of pressure maintenance (jockey or makeup) pumps Informational Note: For the installation of pressure maintenance (jockey or makeup) pumps supplied by the fire pump circuit or another source, see Article 430. (3) Transfer equipment upstream of the fire pump transfer switch(es) (4) Sprinkler systems as covered under NFPA 13D Informational Note: See NFPA , Standard for the Installation of Stationary Pumps for Fire Protection, for further information. THERE IS CONFUSION OUT THERE AMONST CONTRACTORS, BUILDING OFFICIALS, ELECTRICAL INSPECTORS, FIRE PREVENTION OFFICIALS AND FIRE PROTECTION ENGINEERS ON THE 1,2 AND 3 FAMILY HOMES WITH STORAGE TANKS FOR SPRINKLER SYSTEMS AS TO IF ARTICLE 695 APPLIES HERE. THE MANUFACTURERE STATES MUST BE WIRED ACCORDING TO THE CURRENT VERSION OF THE NEC. AFTER MONTHS OF REVIEW I CAME TIO THE REALIZATION THAT NFPA 13D APLIES TO 1 & 2 FAMILY AND DOES NOT RELATE TO NFPA 20 FOR FIRE PUMPS WHICH REFERS THE INSTALLING AND DESIGNING CONTRACTOR TO ARTICLE 695 OF THE CURRENT VERSION OF THE NEC. FYI; NFPA 13R DOES RELATE TO NFPA 20 FOR THE 3 FAMILY Submitter Full Name: ROBERT MCGANN Organization: WOBURN ELECTRICAL SCHOOL Affilliation: CITY OF CAMBRIDGE MA Submittal Date: Wed Oct 29 09:21:47 EDT 2014 Panel 13 FD Agenda page 94

125 840 of /18/2014 2:46 PM Public Input No NFPA [ Section No [Excluding any Sub-Sections] ] Electric motor-driven fire pumps shall have a reliable source of power for systems rated 1000v nominal or less. For systems rated above 1000v see section 490 for additional requirements this section needs to coordinate with and 430 and 310 for 1000v motors Submitter Full Name: JAMES CAIN Organization: [ Not Specified ] Affilliation: self Submittal Date: Thu Nov 06 21:51:37 EST 2014 Panel 13 FD Agenda page 95

126 838 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Power Source(s) for Electric Motor-Driven Fire Pumps. Electric motor-driven fire pumps shall have a reliable source of power. Informational Note: NFPA Standard for the Installation of Stationary Pumps for Fire Protection, provides guidance on the determination of power source reliability. See and A (A) Individual Sources. Where reliable, and where capable of carrying indefinitely the sum of the locked-rotor current of the fire pump motor(s) and the pressure maintenance pump motor(s) and the full-load current of the associated fire pump accessory equipment when connected to this power supply, the power source for an electric motor driven fire pump shall be one or more of the following. (1) Electric Utility Service Connection. A fire pump shall be permitted to be supplied by a separate service, or from a connection located ahead of and not within the same cabinet, enclosure, vertical switchgear section, or vertical switchboard section as the service disconnecting means. The connection shall be located and arranged so as to minimize the possibility of damage by fire from within the premises and from exposing hazards. A tap ahead of the service disconnecting means shall comply with (5). The service equipment shall comply with the labeling requirements in and the location requirements in (B). [20:9.2.2(1)] (2) On-Site Power Production Facility. A fire pump shall be permitted to be supplied by an on-site power production facility. The source facility shall be located and protected to minimize the possibility of damage by fire. [20:9.2.2(3)] (3) Dedicated Feeder. A dedicated feeder shall be permitted where it is derived from a service connection as described in 695.3(A)(1). [20:9.2.2(3)] (B) Multiple Sources. If reliable power cannot be obtained from a source described in 695.3(A), power shall be supplied by one of the following: [20:9.3.2] (1) Individual Sources. An approved combination of two or more of the sources from 695.3(A). (2) Individual Source and On-site Standby Generator. An approved combination of one or more of the sources in 695.3(A) and an on-site standby generator complying with 695.3(D). [20:9.3.4] Exception to (B)(1) and (B)(2): An alternate source of power shall not be required where a back-up engine-driven or back-up steam turbine-driven fire pump is installed. [ 20: 9.3.3] (C) Multibuilding Campus-Style Complexes. If the sources in 695.3(A) are not practicable and the installation is part of a multibuilding campus-style complex, feeder sources shall be permitted if approved by the authority having jurisdiction and installed in accordance with either (C)(1) and (C)(3) or (C)(2) and (C)(3). (1) Feeder Sources. Two or more feeders shall be permitted as more than one power source if such feeders are connected to, or derived from, separate utility services. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). (2) Feeder and Alternate Source. A feeder shall be permitted as a normal source of power if an alternate source of power independent from the feeder is provided. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). (3) Selective Coordination. The overcurrent protective device(s) in each disconnecting means shall be selectively coordinated with any other supply-side overcurrent protective device(s). (D) On-Site Standby Generator as Alternate Source. An on-site standby generator(s) used as an alternate source of power shall comply with (D)(1) through (D)(3). [20: ] (1) Capacity. The generator shall have sufficient capacity to allow normal starting and running of the motor(s) driving the fire pump(s) while supplying all other simultaneously operated load(s). [20: ] Automatic shedding of one or more optional standby loads in order to comply with this capacity requirement shall be permitted. Panel 13 FD Agenda page 96

127 839 of /18/2014 2:46 PM (2) Connection. A tap ahead of the generator disconnecting means shall not be required. [20: ] (3) Adjacent Disconnects. The requirements of shall not apply. (E) Arrangement. All power supplies shall be located and arranged to protect against damage by fire from within the premises and exposing hazards. [20:9.1.4] Multiple power sources shall be arranged so that a fire at one source does not cause an interruption at the other source. (F) Transfer of Power. Transfer of power to the fire pump controller between the individual source and one alternate source shall take place within the pump room. [20:9.6.4] (1) Power Source Selection. Selection of power source shall be performed by a transfer switch listed for fire pump service. [20: ] (2) Overcurrent Device Selection. An instantaneous trip circuit breaker shall be permitted in lieu of the overcurrent devices specified in 695.4(B) (2)(a)(1), provided that it is part of a transfer switch assembly listed for fire pump service that complies with 695.4(B)(2)(a)(2). (G) Phase Converters. Phase converters shall not be permitted to be used for fire pump service. [20:9.1.7] The determination of the "reliability" of a service connection supplying an electric fire pump is required in The requirement for "reliability" is located in NFPA in and is extracted into the NEC. NFPA 20 has purview over the performance of fire pumps. The explanatory material in Annex A, specifically A provides significant guidelines for the determination of reliability. This proposed Informational Note is necessary to provide users of the NEC with a means to determine reliability. Submitter Full Name: James Dollard Organization: IBEW Local Union 98 Submittal Date: Fri Oct 31 09:48:19 EDT 2014 Panel 13 FD Agenda page 97

128 841 of /18/2014 2:46 PM Public Input No NFPA [ New Section after 695.3(2) ] (3) Separately Mounted Transfer Switch. A fire pump power transfer switch that is separately mounted, if provided, shall be the delayed transition type providing a position that intentionally disconnects the fire pump controller from both the individual source and alternate source for a maximum period of 10 seconds. Fire pump power transfer switches that are separately mounted (not part of a combination fire pump controller and power transfer switch) are difficult to coordinate with the downstream fire pump controller to provide a method of eliminating higher than normal inrush currents when transferring the fire pump motor from one source to the other. NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection, 2013 Edition states; In-Rush Currents. Means shall be provided to prevent higher than normal in-rush currents when transferring the fire pump motor from one source to the other The use of an in-phase monitor or an intentional delay via an open neutral position of the transfer switch to comply with the requirements of shall be prohibited. This requires coordination of various control methods between the separately mounted fire pump transfer switch and the fire pump controller to disconnect the fire pump motor during transfer. An example of a typical method requires the transfer switch to provide a pre-signal to the fire pump controller that a transfer is about to take place. The fire pump controller then opens the fire pump motor contactor. The fire pump controller will reclose the contactor when the signal is removed from the fire pump transfer switch after it transfers. Typically, a delay of approximately 10 seconds is provided by either the transfer switch or the fire pump controller to provide a period for the motor to coast down in speed prior to reconnection to the other source. The preferred manner to provide a separately mounted fire pump transfer switch is to require it to be of the delayed transition type providing a position that intentionally disconnects the fire pump controller from both sources for a period of time to eliminate higher than normal inrush currents to the fire pump motor. A 10 seconds maximum disconnect period of the fire pump controller has been found to provide the required inrush current reduction. This requirement prevents higher than normal inrush currents without requiring coordination and control circuit wiring between the transfer switch and fire pump controller. In conjunction with this proposal for NFPA 70, a proposal is being made by William Stelter for NFPA 20 as follows; The use of an in-phase monitor or an intentional delay via an open neutral position of the transfer switch to comply with the requirements of shall be prohibited (7) The transfer switch shall be the delayed transition type with a maximum delay time of 3 seconds. Submitter Full Name: VINCE BACLAWSKI Organization: NEMA Submittal Date: Fri Sep 19 15:24:24 EDT 2014 Panel 13 FD Agenda page 98

129 842 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Multibuilding Campus-Style Complexes. If the sources in 695.3(A) are not practicable and the installation is part of a multibuilding campus-style complex, feeder sources shall be permitted if approved by the authority having jurisdiction and installed in accordance with either (C)(1) and (C)(3) or (C)(2) and (C)(3). (1) Feeder Sources. Two or more feeders shall be permitted as more than one power source if such feeders are connected to, or derived from, separate utility services. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). (2) Feeder and Alternate Source. A feeder shall be permitted as a normal source of power if an alternate source of power independent from the feeder is provided. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). Informational Note: When the Authority Having Jurisdiction has identified the normal source of power as an on-site generating source, such a district energy plant, then the source of power to the fire pump may originate from an adjacent independent utility source as per NFPA 110 Section (3) Selective Coordination. The overcurrent protective device(s) in each disconnecting means shall be selectively coordinated with any other supply-side overcurrent protective device(s). For the convenience of the committee the relevant section from NFPA 110 is shown below and has been a long-standing allowance: 5.1 Energy Sources * The following energy sources shall be permitted to be used for the emergency power supply (EPS): (1)* Liquid petroleum products at atmospheric pressure (2) Liquefied petroleum gas (liquid or vapor withdrawal) (3) Natural or synthetic gas Exception: For Level 1 installations in locations where the probability of interruption of off-site fuel supplies is high, on-site storage of an alternate energy source sufficient to allow full output of the EPSS to be delivered for the class specified shall be required, with the provision for automatic transfer from the primary energy source to the alternate energy source Seismic design category C, D, E, or F, as determined in accordance with ASCE 7, shall require a Level 1 EPSS Class X (minimum of 96 hours of fuel supply) The energy sources listed in shall be permitted to be used for the EPS where the primary source of power is by means of on-site energy conversion, provided that there is separately dedicated energy conversion equipment on-site with a capacity equal to the power needs of the EPSS * A public electric utility that has a demonstrated reliability shall be permitted to be used as the EPS where the primary source is by means of on-site energy conversion. In cases where a generator is not required to drive the fire pump (by building codes) the ability to tap an adjacent utility source offers safety and economy to our industry and others. Submitter Full Name: Organization: Affilliation: Michael Anthony University of Michigan IEEE Educational & Healthcare Facility Electrotechnology Subcommittee Panel 13 FD Agenda page 99

130 of /25/2014 2:28 PM Public Input No. 266-NFPA [ Section No (C) [Excluding any Sub-Sections] ] If the sources in ( A) are not practicable and the installation is C). Multibuilding Campus Style Complexes A feeder connection where all of the following conditions are met: (a) The protected facility is part of a multibuilding campus-style complex, feeder sources shall be permitted if approved by the authority having jurisdiction and installed in accordance with either (C)(1) and (C)(3) or (C)(2) and (C)(3). arrangement. (b) The backup source of power is provided from a source independent of the normal source of power. (c) It is impractical to supply the normal source of power through the arrangement in (A) or (B) (d) The arrangement is acceptable to the authority having jurisdiction. (e) The overcurrent protection device(s) in each disconnecting means is selectively coordinated with any other supply side overcurrent protective device(s). [ 20 :9.2.2 (4)] The intent of this change is to have the language and the rules, for supplying fire pumps in buildings that are part of a multi-building campus-style facility, coincide with NFPA 20. Section of NFPA 20 requires a normal source of power to be a "continually available source" recognizes that a service connection dedicated to the fire pump, a dedicated feeder derived from a service, an onsite power production source, or a feeder connection in a building that is part of a Multi-building campus facility that has a backup source (two feeders), meets the requirements. They are all considered equal in terms of their reliability for providing normal power to a fire pump controller. Campus hospitals and colleges will typically have a central energy plant where two medium voltage feeders originate and supply the buildings. A typical design is for them to supply a double ended unitized sub station with transformation. The secondary low voltage switchboard sections are configured as a main/tie/main. NFPA 20 allows a feeder to the fire pump to originate from one of these switchboard sections, thus giving it, via the tie breaker, the backup that is stipulated in 9.2.2(4)(b) (NFPA 20) (C) (NFPA 70)would require a tap ahead of one of the secondary mains. This requirement is not allowing the fire pump feeder to ever be connected to the back up source. Related Public Inputs for This Document Related Input Public Input No. 268-NFPA [Section No (C)(2)] Public Input No. 267-NFPA [Section No (C)(1)] Relationship sections to be deleted contingent on the acceptance of PI 266 sections to be deleted contingent on the acceptance of PI 266 Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Sun Feb 09 13:54:57 EST 2014 Panel 13 FD Agenda page 100

131 of /25/2014 2:29 PM Public Input No. 267-NFPA [ Section No (C)(1) ] (1) Feeder Sources. Two or more feeders shall be permitted as more than one power source if such feeders are connected to, or derived from, separate utility services. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). See PI 266 Related Public Inputs for This Document Related Input Public Input No. 268-NFPA [Section No (C)(2)] Public Input No. 266-NFPA [Section No (C) [Excluding any Sub-Sections]] Relationship sections to be deleted contingent on the acceptance of PI 266 Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Sun Feb 09 14:27:44 EST 2014 Copyright Assignment I, Lawrence Forshner, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Lawrence Forshner, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 101

132 of /25/2014 2:30 PM Public Input No. 268-NFPA [ Section No (C)(2) ] (2) Feeder and Alternate Source. A feeder shall be permitted as a normal source of power if an alternate source of power independent from the feeder is provided. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). See PI 266 Related Public Inputs for This Document Related Input Public Input No. 267-NFPA [Section No (C)(1)] Public Input No. 266-NFPA [Section No (C) [Excluding any Sub-Sections]] Relationship sections to be deleted contingent on the acceptance of PI 266 Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Sun Feb 09 14:36:40 EST 2014 Copyright Assignment I, Lawrence Forshner, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Lawrence Forshner, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 102

133 of /25/2014 2:33 PM Public Input No NFPA [ New Section after 695.3(D) ] TITLE OF NEW CONTENT (D) (4) Occupied buliding Type your content here... When a building is occupied during a normal power outage, the power supplying the Fire pump shall be remain energize. Power outages have become more commonly associated with the loss of the normal power supply due to vehicular accidents or weather events. In most cases, the building owner has an optional standby system installed and core functions are keep on line with employees occupying the building. In this type of event, a level of fire protection should be provided that is equal to the same protection offered when the building is supplied through the normal power supply. Submitter Full Name: Alfio Torrisi Organization: Master electrician Submittal Date: Thu Oct 30 07:53:59 EDT 2014 Copyright Assignment I, Alfio Torrisi, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Alfio Torrisi, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 103

134 Public Input No. 950-NFPA [ Section No (A) ] (A) Direct Connection. The supply conductors shall directly connect the power source to a listed fire and labeled fire pump controller, a listed and labeled combination fire pump controller and power transfer switch, or a listed fire and labeled fire pump power transfer switch. By adding the word labeled, it will identify that listed products also need to be labeled. Both terms listed and labeled are defined in article 100, but are not used consistently throughout the NEC. If taken literally, as defined in Article 100, a product could be listed and not labeled and still comply with the NEC when not required to be listed and labeled such as in sections 424.6, 646.3(I), and (C) to identify a few. The UL White Book identifies that only those products bearing the appropriate UL Mark and the company's name, trade name, trademark or other authorized identification should be considered as being covered by UL's Certification, Listing, Classification and Follow-Up Service. Therefore, if not identified within the UL Certification Directory as indicated in the definition of listed and bearing the appropriate UL mark as indicated in the definition of labeled the product is not considered by UL to be listed. This is not just UL; all of the test laboratories have a very similar requirement. This change will help make the NEC a more consistent document for AHJ s. Submitter Full Name: JEFFREY FECTEAU Organization: UNDERWRITERS LABORATORIES LLC Submittal Date: Thu Jul 24 20:53:38 EDT 2014 Copyright Assignment I, JEFFREY FECTEAU, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am JEFFREY FECTEAU, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 104 of 1 11/25/2014 2:34 PM

135 845 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B)(3) ] (3) Disconnecting Means. All disconnecting devices that are unique to the fire pump loads shall comply with items (a) through (e). (a) Features and Location Normal Power Source. The disconnecting means for the normal power source shall comply with all of the following: [20: ] (2) Be identified as suitable for use as service equipment. (3) Be lockable in the closed position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed. (1) in accordance with (2) Not be located within the same enclosure, panelboard, switchboard, switchgear, or motor control center, with or without common bus, that supplies loads other than the fire pump. (3) Be located sufficiently remote from other building or other fire pump source disconnecting means such that inadvertent operation at the same time would be unlikely. (d) Features and Location On-Site Standby Generator. The disconnecting means for an on-site standby generator(s) used as the alternate power source shall be installed in accordance with (B) (5) for emergency circuits and shall be lockable in the closed position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed. (e) Disconnect Marking. The disconnecting means shall be marked Fire Pump Disconnecting Means. The letters shall be at least 25 mm (1 in.) in height, and they shall be visible without opening enclosure doors or covers. [20: (5)] (f) Controller Marking. A placard shall be placed adjacent to the fire pump controller, stating the location of this disconnecting means and the location of the key (if the disconnecting means is locked). [20: ] (g) Supervision. The disconnecting means shall be supervised in the closed position by one of the following methods: (8) Central station, proprietary, or remote station signal device (9) Local signaling service that causes the sounding of an audible signal at a constantly attended point (10) Locking the disconnecting means in the closed position (11) Sealing of disconnecting means and approved weekly recorded inspections when the disconnecting means are located within fenced enclosures or in buildings under the control of the owner [ 20: ] The deleted wording is no longer necessary now that is in place. Note that this input as written simply revises (2) to read: "Be lockable in the closed position in accordance with " The additional numbered paragraph entry is due to a TerraView software problem, along with the random underwriting that follows. Submitter Full Name: Frederic Hartwell Organization: Hartwell Electrical Services, Inc. Panel 13 FD Agenda page 105

136 847 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C)(2) ] (2) Overcurrent Protection. The transformer size, the feeder size, and the overcurrent protective device(s) shall be coordinated such that overcurrent protection is provided for the transformer in accordance with and for the feeder in accordance with 215.3, and such that the overcurrent protective device(s) is selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motor(s), the pressure maintenance pump motor(s), the full-load current of the associated fire pump accessory equipment, and 100 percent of the remaining loads supplied by the transformer. The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the fire pump motor circuit(s). NEC-StyleManual_2011.pdf: Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic. The following are examples of old-fashioned expressions and word uses that shall not be permitted: And such, and the like it is preferable to rearrange the sentence to use such as followed by examples. Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Mon Nov 03 21:22:08 EST 2014 Panel 13 FD Agenda page 106

137 of /25/2014 2:35 PM Public Input No. 265-NFPA [ Section No (A)(2) ] (2) Feeders. Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) permitted by 695.4(B), or conductors that connect directly to an on-site standby generator, shall comply with all of the following: (a) Independent Routing. The conductors shall be kept entirely independent of all other wiring. (b) Associated Fire Pump Loads. The conductors shall supply only loads that are directly associated with the fire pump system. (c) Protection from Potential Damage. The conductors shall be protected from potential damage by fire, structural failure, or operational accident. (d) Inside of a Building. Where routed through a building, the conductors shall be installed using one of the following methods: (1) Be encased in a minimum 50 mm (2 in.) of concrete (2) Be installed under not less than 50 mm (2 in.) of concrete on grade (3) Be protected by a fire-rated assembly listed to achieve a minimum fire rating of 2 hours and dedicated to the fire pump circuit(s) (4) Be a listed electrical circuit protective system with a minimum 2-hour fire rating Informational Note: UL guide information for electrical circuit protective systems (FHIT) contains information on proper installation requirements to maintain the fire rating. Exception to (A)(2)(d): The supply conductors located in the electrical equipment room where they originate and in the fire pump room shall not be required to have the minimum 2-hour fire separation or fire resistance rating, unless otherwise required by (D) of this Code. Additional Proposed Changes File Name Description Approved 1407_001.pdf information referenced in my substantiation from ROP (695-6(b)) Fire Pump feeders that travel through a building must be protected against attack by fire, structural failure and operational accident. The substantiation that created the rule in the 2002 code (see ROC attached) to allow a two hour fire rated chase or a two hour fire rated cable assembly did not include any substantiation that they also will protect the feeder and the building from structural failure or operational accident. They should only be allowed to be installed as service entrance conductors as allowed by unless the methods to protect them have been evaluated by a nationally recognized third party testing laboratory, for structural failure and operational accident. Such testing might show that 3/0 MI cable sized to its free air ampacity and feeding a 200 HP fire pump connected to a 1600 amp feeder breaker might become "cherry red" in the event of a failure in the pump room causing an excessive amount of current to flow in the feeder circuit (operational accident). An MC cable assembly with an inherent 2 hour rating might not withstand a block wall or an I beam falling on it, and would have to be grossly over sized to prevent operational failure. Would a drywall chase protect the cable assembly from structural failure? Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Panel 13 FD Agenda page 107

138 848 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A)(2) ] (2) Feeders. Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) permitted by 695.4(B), or conductors that connect directly to an on-site standby generator, shall comply with all of the following: (a) Independent Routing. The conductors shall be kept entirely independent of all other wiring. (b) Associated Fire Pump Loads. The conductors shall supply only loads that are directly associated with the fire pump system. (c) Protection from Potential Damage. The conductors shall be protected from potential damage by fire, structural failure, or operational accident. (d) Inside of a Building. Where routed through a building, the conductors shall be installed have a minimum 2 hour fire resistive rating installed using one of the following methods: (5) Be encased in a minimum 50 mm (2 in.) of concrete (1) a listed fire resistive cable system (2) Be installed under not less than 50 mm (2 in.) of concrete on grade (3) Be protected by (1) a fire-rated assembly (1) listed to achieve a minimum fire rating of 2 hours and dedicated to the fire pump circuit(s)be a listed (1) electrical circuit protective system with a minimum 2-hour fire rating (1) Informational Note: UL guide The listing organization provides information for electrical circuit protective systems (FHIT) and fire resistive cables system contains information on proper installation requirements to maintain the fire rating. Exception to (A)(2)(d): The supply conductors located in the electrical equipment room where they originate and in the fire pump room shall not be required to have the minimum 2-hour fire separation or fire resistance rating, unless otherwise required by (D) of this Code. Additional Proposed Changes File Name 695.6_A_2_proposed_changes.docx Description Approved Electrical circuit protective systems are tested to UL Subject 1724 which protect electrical wiring systems using thermal barrier which limits the temperature the wiring systems will be exposed to thus maintaining circuit integrity. A fire resistive cable system in tested to UL 2196 and test the electrical cables when exposed directly to the fire. Both systems use the same ASTM E119 time temperature curve and exposure to a hose stream test. Panel 13 FD Agenda page 108

139 849 of /18/2014 2:46 PM An electrical circuit protective system can include concrete encased wiring system and protective assemblies wiring systems such as dry wall assemblies therefore UL 1724 should cover all other types of protective methods. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (D)(1)] Public Input No NFPA [Section No (C)(2)] Relationship Submitter Full Name: James Conrad Organization: RSCC Wire & Cable Affilliation: CDA Submittal Date: Fri Nov 07 21:46:13 EST 2014 Panel 13 FD Agenda page 109

140 850 of /18/2014 2:46 PM Public Input No. 667-NFPA [ Section No (D) ] (D) Pump Wiring. All wiring from the controllers to the pump motors shall be in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, liquidtight flexible metal conduit, or liquidtight flexible nonmetallic conduit Type (LFNC-B ), listed Type MC cable with an impervious covering, or Type MI cable. Electrical connections at motor terminal boxes shall be made with a listed means of connection. Twist-on, insulation-piercing type, and soldered wire connectors shall not be permitted to be used for this purpose. Revise "LFNC-B" in 695.6(D) to "LFNC". The three Types of Liquidtight Flexible Nonmetallic Conduit (LFNC) that are described in are required to be Listed to UL1660 Liquidtight Flexible Nonmetallic Conduit. All three Types of LFNC are required to meet the same physical performance testing, such as cold temperature impact, vertical flame, tension, deformation, ect, per UL1660. Each Type of LFNC is equivalent and are acceptable wiring methods for Fire Pump Wiring. Submitter Full Name: David Kendall Organization: Thomas & Betts Corporation Submittal Date: Thu Jun 05 10:48:18 EDT 2014 Panel 13 FD Agenda page 110

141 851 of /18/2014 2:46 PM Public Input No NFPA [ Section No (J) ] (J) Raceway Terminations. Where raceways are terminated at a fire pump controller, the following requirements shall be met: [20:9.9] (1) Listed conduit hubs shall be used. [20:9.9.1] (2) The type rating of the conduit hub(s) shall be at least equal to that of the fire pump controller. [20:9.9.2] (3) The installation instructions of the manufacturer of the fire pump controller shall be followed. [20:9.9.3] (4) Alterations to the fire pump controller, other than conduit entry as allowed elsewhere in this Code, shall be approved by the authority having jurisdiction. [20:9.9.4] NEC_StyleManual_2011.pdf: Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic. The following are examples of old-fashioned expressions and word uses that shall not be permitted: "as allowed" Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Tue Nov 04 08:20:09 EST 2014 Panel 13 FD Agenda page 111

142 852 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Voltage Drop. (A) Starting. The voltage at the fire pump controller line terminals shall not drop more than 15 percent below normal (controller-rated voltage) under motor starting conditions. Exception: This limitation shall not apply for emergency run mechanical starting. [ 20: 9.4.2] (B) Running. The voltage at the load terminals of the fire pump controller shall not drop more than 5 percent below the voltage rating of the motor connected to those terminals when the motor is operating at 115 percent of the full-load current rating of the motor. Informational Note: For additional information on motor-starting see IEEE Recommended Practice for Conducting Motor-Starting Studies in Industrial and Commercial Power Systems Motor starting should be informed by more dynamic engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. The benefit of now referencing the 3000 series of documents into the NEC now include, but are not limited to: 1) the elimination of duplicate material that now exists in the various color books, 2) the speeding up of the revision process by allowing Color Book content to be reviewed, edited and balloted in smaller segments, and 3) to accommodate more modern, efficient and cost effective physical publishing/distribution methodologies (i.e., the elimination of large and expensive to produce books). This recommended practice is likely to be of greatest value to the power-oriented engineer with limited experience with such requirements and a way to connect more directly with domain expertise in leading practice for designing safer supply circuits to end-use equipment More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Mon Nov 03 05:35:05 EST 2014 Panel 13 FD Agenda page 112

143 853 of /18/2014 2:46 PM Public Input No NFPA [ Section No (E) ] (E) Electric Fire Pump Control Wiring Methods. All electric motor driven fire pump control wiring shall be in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, liquidtight flexible metal conduit, liquidtight flexible nonmetallic conduit Type B (LFNC-B), listed Type MC cable with an impervious covering, or Type MI cable. During the 2011 NEC cycle, the CMP accepted a proposal to add EMT to 695.6(D) Pump Wiring. Section Control Wiring was inadvertently overlooked and EMT should also be acceptable for use in (E) Electric Fire Pump Control Wiring Methods. Submitter Full Name: VINCE BACLAWSKI Organization: NEMA Submittal Date: Fri Sep 19 15:28:37 EDT 2014 Panel 13 FD Agenda page 113

144 854 of /18/2014 2:46 PM Public Input No. 668-NFPA [ Section No (E) ] (E) Electric Fire Pump Control Wiring Methods. All electric motor driven fire pump control wiring shall be in rigid metal conduit, intermediate metal conduit, liquidtight flexible metal conduit, liquidtight flexible nonmetallic conduit Type B (LFNC-B ), listed Type MC cable with an impervious covering, or Type MI cable. Revise "LFNC-B" in (E) to "LFNC". The three Types of Liquidtight Flexible Nonmetallic Conduit (LFNC) that are described in are required to be Listed to UL1660 Liquidtight Flexible Nonmetallic Conduit. All three Types of LFNC are required to meet the same physical performance testing, such as cold temperature impact, vertical flame, tension, deformation, ect, per UL1660. Each Type of LFNC is equivalent and are acceptable wiring methods for Fire Pump Control Wiring. Submitter Full Name: David Kendall Organization: Thomas & Betts Corporation Submittal Date: Thu Jun 05 10:52:39 EDT 2014 Panel 13 FD Agenda page 114

145 855 of /18/2014 2:46 PM Public Input No NFPA [ New Section after (F) ] Surge Protection. A listed Type 1 or Type 2 SPD shall be installed in, on, or immediately adjacent to the fire pump controller The study, Data Assessment for Electrical Surge Protective Devices commissioned by the Fire Protection Research Foundation, 1 Batterymarch Park, Quincy, MA , provides results of a 2013 and 2014 survey of facility managers concerning surge damage. It shows that 12% had damage to fire pumps due to voltage surges. Much of this damage could have been prevented with properly sized surge protective devices. This proposed requirement is necessary because fire pumps are so critical for life-safety. As seen in the NFPA Research Foundation report there are a significant number of fire pump installations that suffer damage that could have been prevented by a SPD. The purpose of the NEC is the practical safeguarding of persons and property. It is practical and feasible to protect fire pump installations from damage with a SPD. Submitter Full Name: James Dollard Organization: IBEW Local Union 98 Submittal Date: Mon Oct 27 11:48:33 EDT 2014 Panel 13 FD Agenda page 115

146 859 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted. Informational Note No. 1: For further information regarding wiring and installation of emergency systems in health care facilities, see Article 517. Informational Note No. 2: For further information regarding performance and maintenance of emergency systems in health care facilities, see NFPA , Health Care Facilities Code. Informational Note No. 3: For specification of locations where emergency lighting is considered essential to life safety, see NFPA , Life Safety Code. Informational Note No. 4: For further information regarding performance of emergency and standby power systems, see NFPA , Standard for Emergency and Standby Power Systems. This is an editorial change to update 517 references to the recent changes to 2015 NFPA Healthcare Facilities Code to correlate information between the two documents as per the 2011 National Electrical Code Style Manual Section and subsequent sections. Submitter Full Name: Gary Beckstrand Organization: Utah Electrical JATC Submittal Date: Tue Nov 04 15:49:14 EST 2014 Panel 13 FD Agenda page 116

147 856 of /18/2014 2:46 PM Public Input No NFPA [ Section No (F) ] (F) Generator Control Wiring Methods. Control conductors installed between the fire pump power transfer switch and the standby generator supplying the fire pump during normal power loss shall be kept entirely independent of all other wiring. They shall be protected to resist potential damage by fire or structural failure. They shall be permitted to be routed through a building(s) using one of the following methods: (1) Be encased in a minimum 50 mm (2 in.) of concrete. (2) Be protected by a fire-rated assembly listed to achieve a minimum fire rating of 2 hours and dedicated to the fire pump circuits. (3) Be a listed electrical circuit protective system with a minimum 2-hour fire rating. The installation shall comply with any restrictions provided in the listing of the electrical circuit protective system used. (4) A failure or opening of the generator (normally closed) remote start loop shall result in a generator start signal. Informational Note: UL guide information for electrical circuit protective systems (FHIT) contains information on proper installation requirements to maintain the fire rating. Adding subsection #4 will insure that there will be power to the emergency terminals of the fire pump controller in the event of structural failure to the start circuit. It will also supervise the start circuit under normal conditions, in that an open/failure of the start circuit, will start the generator and alert the occupants that in the event of a normal power loss, the fire pump will not be available. There is similar language in NFPA 20 for pump control wiring outside the pump room. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (D)(3)] Relationship similar language for a generator start circuit for emergency loads and fire pump loads Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Wed Oct 29 13:49:33 EDT 2014 Panel 13 FD Agenda page 117

148 858 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of emergency systems and health care faciity essential electrial systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted. Informational Note No. 1: For further information regarding wiring and installation of emergency systems in health care facilities, see Article 517. Informational Note No. 2: For further information regarding performance and maintenance of emergency systems in health care facilities, see NFPA , Health Care Facilities Code. Informational Note No. 3: For specification of locations where emergency lighting is considered essential to life safety, see NFPA , Life Safety Code. Informational Note No. 4: For further information regarding performance of emergency and standby power systems, see NFPA , Standard for Emergency and Standby Power Systems. The phrase emergency system is no longer used in Article 517 and is no longer used in reference to electrical systems in NFPA 99 Health Care Facilities Code. Both documents now refer to a health care facilities essential electrical system. These very important essential systems meet all of the criteria found in The patients and workers served by these essential systems are certainly worthy of the life safety protections that are found in Article 700. These simple revisions not only provide important safety standards for those patients unable to protect themselves they provide important safe guards to front-line workers who would be tasked with patient safety in the event of a natural or man-made disaster. This revision does not expand the scope of Article 700 into health care facilities, as both informational notes attest, Article 700 has mentioned health care facilities since Article 700 became "Emergency Systems" in This revision simply better defines the role of the critical electrical system safe guards found in Article 700 in a health care environment, greatly helping patients, health care workers and code users everywhere. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Submitter Full Name: Stephen Lipster Organization: The Electrical Trades Center Affilliation: IBEW Submittal Date: Tue Nov 04 11:49:34 EST 2014 Panel 13 FD Agenda page 118

149 857 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted. Informational Note No. 1: For further information regarding wiring and installation of emergency systems in health care facilities, see Article 517. Informational Note No. 2: For further information regarding performance and maintenance of emergency systems in health care facilities, see NFPA , Health Care Facilities Code. Informational Note No. 3: For specification of locations where emergency lighting is considered essential to life safety, see NFPA , Life Safety Code. Informational Note No. 4: For further information regarding performance of emergency and standby power systems, see NFPA , Standard for Emergency and Standby Power Systems. Informational Note 5: For additional information see IEEE P Recommended Practice for the Application of Stored-Energy Systems for use in Emergency and Stand-By Power Systems Stored energy systems should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Mon Nov 03 22:23:40 EST 2014 Panel 13 FD Agenda page 119

150 864 of /18/2014 2:46 PM Public Input No NFPA [ Definition: Emergency Systems. ] Emergency Systems. Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note 1 : Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Informational Note 2 : A public utility shall be permitted to provide emergency power to a building that is normally supplied by an on-site power source. To quote the 2010 NFPA 110: 5.1 Energy Sources * The following energy sources shall be permitted to be used for the emergency power supply (EPS): (1)* Liquid petroleum products at atmospheric pressure (2) Liquefied petroleum gas (liquid or vapor withdrawal) (3) Natural or synthetic gas Exception: For Level 1 installations in locations where the probability of interruption of off-site fuel supplies is high, on-site storage of an alternate energy source sufficient to allow full output of the EPSS to be delivered for the class specified shall be required, with the provision for automatic transfer from the primary energy source to the alternate energy source Seismic design category C, D, E, or F, as determined in accordance with ASCE 7, shall require a Level 1 EPSS Class X (minimum of 96 hours of fuel supply) The energy sources listed in shall be permitted to be used for the EPS where the primary source of power is by means of on-site energy conversion, provided that there is separately dedicated energy conversion equipment on-site with a capacity equal to the power needs of the EPSS * A public electric utility that has a demonstrated reliability shall be permitted to be used as the EPS where the primary source is by means of on-site energy conversion. This possibility makes safe and economical sense for large multi-building campuses with their own district energy system that provides power reliable enough for the AHJ to identify it as the primary source. Therefore the utility on the periphery, contingent upon availability of supply circuits and local tariffs, may provide emergency power. The safety and economic advantages of this are substantial because it can reduce the number of on-site generators on the periphery of the campus with district energy power. Submitter Full Name: Organization: Affilliation: Michael Anthony University of Michigan IEEE Educational & Healthcare Facility Electrotechnology Subcommittee Panel 13 FD Agenda page 120

151 863 of /18/2014 2:46 PM Public Input No. 754-NFPA [ Section No ] Definitions. Emergency Systems. Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Luminaire, Directly Controlled. An emergency lighting luminaire that operates on constant power and has a control input for an integral dimming or switching function that is used to drive the luminaire to full brightness upon loss of utility power. Informational Note: See ANSI/UL924 Emergency Lighting and Power Equipment for requirements covering Directly Controlled Luminaires Relay, Automatic Load Control. A device used to set normally dimmed or normally-off switched emergency lighting equipment to full power illumination levels in the event of a loss of the normal supply by bypassing the dimming/switching controls, and to return the emergency lighting equipment to normal status when the device senses the normal supply has been restored. Informational Note: See ANSI/UL 924, Emergency Lighting and Power Equipment, for the requirements covering automatic load control relays. A new class of luminaire has appeared and is being used in emergency lighting systems. These are typically dimmable LED or fluorescent luminaires that operate on constant power and contain integral dimming or switching functionality accessed via a control input on the luminaire. The state of this control input is used to drive the luminaire to full brightness upon loss of utility power. In the 2014 cycle, section was added covering the requirements of these devices. An accompanying definition proposal for was rejected and never reinstated when CMP-13 accepted the proposal in the comment phase. The definition is now needed to accompany Submitter Full Name: Steven Terry Organization: Electronic Theatre Controls Inc Affilliation: US Institute for Theatre Technology Submittal Date: Tue Jul 01 21:30:49 EDT 2014 Panel 13 FD Agenda page 121

152 862 of /18/2014 2:46 PM Public Input No. 753-NFPA [ Section No ] Definitions. Branch Circuit Emergency Lighting Transfer Switch (BCELTS). A device connected on the load side of a branch circuit protective device that transfers only emergency lighting loads from the normal utility supply to a continuously available synchronous or asynchronous emergency supply. Informational Note: See ANSI/UL 1008 Transfer Switch Equipment for the requirements covering branch circuit emergency lighting transfer switches Emergency Systems. Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Relay, Automatic Load Control. A device used to set normally dimmed or normally-off switched emergency lighting equipment to full power illumination levels in the event of a loss of the normal supply by bypassing the dimming/switching controls, and to return the emergency lighting equipment to normal status when the device senses the normal supply has been restored. Informational Note: See ANSI/UL 924, Emergency Lighting and Power Equipment, for the requirements covering automatic load control relays. UL1008 now contains the requirements for a new device: the Branch Circuit Emergency Lighting Transfer Switch (BCELTS). A separate proposal for section (new) introduces these devices to the NEC. As such, the definition of this proposal is needed. Submitter Full Name: Steven Terry Organization: Electronic Theatre Controls Inc Affilliation: US Institute for Theatre Technology Submittal Date: Tue Jul 01 18:05:02 EDT 2014 Panel 13 FD Agenda page 122

153 861 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Definitions. Emergency Systems. Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Relay, Automatic Load Control. A device used to set normally dimmed or normally-off switched emergency lighting equipment to full power illumination levels in the event of a loss of the normal supply by bypassing the dimming/switching controls, and to return the emergency lighting equipment to normal status when the device senses the normal supply has been restored. Informational Note: See ANSI/UL 924, Emergency Lighting and Power Equipment, for the requirements covering automatic load control relays. PI 753 has been submitted to add a new definition for a Branch Circuit Emergency Lighting Transfer Switch (BCELTS). This definition includes the terms synchronous or asynchronous emergency supply." Because these terms are not used in the NEC this PI proposes to add a second Informational Note to the proposed definition (the propose definition includes a singular informational note). Informational Note No. 2: A synchronous generator is called synchronous because the waveform of the generated voltage is synchronized with the rotation of the generator. Each peak of the sinusoidal waveform corresponds to a physical position of the rotor. A synchronous generator is essentially the same machine as a synchronous motor. The magnetic field of the rotor is supplied by direct current or permanent magnets. The output frequency of an asynchronous generator varies depending on the power level, if the RPM is held constant. The peaks of the waveform of an asynchronous generator have no fixed relationship with its rotor position. PI 753 has been submitted to add a new definition for a Branch Circuit Emergency Lighting Transfer Switch (BCELTS). This definition includes the terms synchronous or asynchronous emergency supply." Because these terms are not used in the NEC this PI proposes to add a second Informational Note to the proposed definition (the propose definition includes a singular informational note). Submitter Full Name: John Kovacik Organization: UL LLC Submittal Date: Fri Nov 07 08:52:46 EST 2014 Panel 13 FD Agenda page 123

154 860 of /18/2014 2:46 PM Public Input No. 669-NFPA [ New Section after ] Unit Equipment. Equipment that is powered by rechargeable battery and is intended for illumination in the event of normal source power failure. Those who are new to article 700 and unfamiliar with what Unit Equipment is may find a definition to be beneficial. Related Public Inputs for This Document Related Input Public Input No. 670-NFPA [New Section after 701.2] Relationship Submitter Full Name: DANIEL MCKINNEY Organization: Submittal Date: Thu Jun 05 13:55:10 EDT 2014 Panel 13 FD Agenda page 124

155 853 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] Emergency Illumination all required means of egress lighting, illuminated exit signs, and all other lights specified as necessary to provide required illumination. This PI is submitted to correlate proposed action on an apparent definition which is currently included in the opening sentence of section Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship relocate definition per section of the style manual Submitter Full Name: Charles Palmieri Organization: Town of Norwell Submittal Date: Sat Aug 02 08:41:10 EDT 2014 Panel 13 FD Agenda page 125

156 866 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Battery Systems Maintenance. Where battery systems or unit equipments are involved, including batteries used for starting, control, or ignition in auxiliary engines, the authority having jurisdiction shall require periodic maintenance. Informational Note: The type of maintenance depends upon the battery chemistry and the battery manufacturer s recommended maintenance. Some battery types or configurations may not require or even allow maintenance, other than visual inspection or alarm testing. As battery chemistries other than lead-acid or nickel-cadmium are used in back-up emergency power systems, the code needs to evolve to consider their maintenance requirements (or the lack thereof). Some batteries can drop as low as 50% of nominal voltage with no problems, but the load equipment must determine what voltage range is acceptable. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Tue Oct 28 19:24:16 EDT 2014 Panel 13 FD Agenda page 126

157 867 of /18/2014 2:46 PM Public Input No NFPA [ New Section after 700.3(E) ] (F) Maintenance. Emergency systems shall include permanent means to switch a temporary alternate source to the emergency system. The switching means may be automatic or manual and shall not take longer than 10 seconds to implement. Exception No. 1: When the process supported by the emergency load can be entirely interrupted for up to 6 hours. Exception No. 2 When alternative systems can be temporarily put in place to sustain the function of the emergency load. Exception No. 3: Where a redundant emergency system exists to sustain the emergency load Informational Note: Exception 1 addresses instances when the emergency system is not needed, for example if the building will be unoccupied. An example of Exception 2 is where a generator supports only egress lighting, and temporary battery backed lighting is used to accomplish the function of the emergency sysem. An example of Exceptions 3 would be a two generator system, where only one is needed to support the emergency load. Given the titles of and the sentence: "A portable or temporary...or repair." that is now in 700.4(B) really belongs in Addtioanlly the term "major' is subjective. Oil changes are not generally considered a "major" maintenance item, but on a large generator they can take several hours. The revised language adds clarity. Submitter Full Name: JE Degnan Organization: Sparling Affilliation: ASHE Submittal Date: Fri Oct 31 20:11:49 EDT 2014 Panel 13 FD Agenda page 127

158 868 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Capacity and Voltage. (A) Capacity and Rating. An emergency system shall have adequate capacity and rating for all loads to be operated simultaneously. The emergency system equipment shall be suitable for the maximum available fault current at its terminals. (B) Selective Load Pickup, Load Shedding, and Peak Load Shaving. The alternate power source shall be permitted to supply emergency, legally required standby, and optional standby system loads where the source has adequate capacity or where automatic selective load pickup and load shedding is provided as needed to ensure adequate power to (1) the emergency circuits, (2) the legally required standby circuits, and (3) the optional standby circuits, in that order of priority. The alternate power source shall be permitted to be used for peak load shaving, provided these conditions are met. Peak load shaving operation shall be permitted for satisfying the test requirement of 700.3(B), provided all other conditions of are met. A portable or temporary alternate source shall be available whenever the emergency generator is out of service for major maintenance or repair. This revision is necessary to accommodate the new proposed section. Submitter Full Name: Phil Simmons Organization: Simmons Electrical Services Submittal Date: Thu Nov 06 19:41:00 EST 2014 Panel 13 FD Agenda page 128

159 Public Input No. 420-NFPA [ Section No (A) ] (A) Capacity and Rating. An emergency system shall have adequate capacity and rating for all loads to be operated simultaneously. The emergency system equipment shall be suitable for the maximum available fault current at its terminals. Any additions or modifications to the emergency power source shall include engineered calculations and field testing of the emergency power source. The requirement of engineering calculations and field testing will ensure that the emergency power source will function correctly and as designed. The addition or modification of the emergency power source can occur over a period of time with the addition and/or modification of electrical equipment, devices, or luminaires. The emergency power source may lose some of its capacity over a period of time. Not all jurisdictions have the luxury of electrical plan review, with the inspector being required to make a field call on the spot without any engineering or field testing of the revised emergency power source. The engineering calculations shall be permitted to use the demand metering allowed in NEC Submitter Full Name: Harold Willman Organization: Colorado Code Consulting Submittal Date: Mon Mar 17 19:20:07 EDT 2014 Copyright Assignment I, Harold Willman, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Harold Willman, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 129 of 1 11/25/2014 2:48 PM

160 869 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Capacity and Rating. An emergency system shall have adequate capacity and rating for all loads likely to be operated simultaneously needed in an emergency. The emergency system equipment shall be suitable for the maximum available fault current at its terminals. We need to make sure we do not oversize our generators. Rarely do all loads in a building need emergency power. Energy codes and innovation are driving down the load presented by emergency lighting systems, for example. We have a great deal of actual measurements showing that our emergency load across most facility classes is 2/3rds less than originally conceived in design. Submitter Full Name: Michael Anthony Organization: University of Michigan Affilliation: University of Michigan Submittal Date: Fri Nov 07 16:20:46 EST 2014 Panel 13 FD Agenda page 130

161 871 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Selective Load Pickup, Load Shedding, and Peak Load Shaving. The alternate power source shall be permitted to supply emergency, legally required standby, and optional standby system loads where the source has adequate capacity or where automatic selective load pickup and load shedding is provided as needed to ensure adequate power to (1) the emergency circuits, (2) the legally required standby circuits, and (3) the optional standby circuits, in that order of priority. The alternate power source shall be permitted to be used for peak load shaving, provided these conditions are met. Peak load shaving operation shall be permitted for satisfying the test requirement of 700.3(B), provided all other conditions of are met. A portable or temporary alternate source shall be available whenever the emergency generator is out of service for major maintenance or repair. See proposal for adding 700.3(F) Submitter Full Name: JE Degnan Organization: Sparling Affilliation: ASHE Submittal Date: Fri Oct 31 20:59:03 EDT 2014 Panel 13 FD Agenda page 131

162 Public Input No NFPA [ Section No (B) ] (B) Selective Load Pickup, Load Shedding, and Peak Load Shaving. The alternate power source shall be permitted to supply emergency, legally required standby, and optional standby system loads where the source has adequate capacity or where automatic selective load pickup and load shedding is provided as needed to ensure adequate power to (1) the emergency circuits, (2) the legally required standby circuits, and (3) the optional standby circuits, in that order of priority. The alternate power source shall be permitted to be used for peak load shaving, provided these conditions are met. Peak load shaving operation shall be permitted for satisfying the test requirement of 700.3(B), provided all other conditions of are met. A portable or temporary alternate source shall be available whenever the emergency generator is out of service for major maintenance or repair. Connection of the portable or temporary alternate source shall be by a listed transfer switch. The transfer switch connection of the main alternate source(s) and the portable or temporary alternate source(s) shall not be capable of disconnecting or bypassing all alternate source(s) simultaneously from the system. Facilities and testing firms are disconnecting the permanent alternate source conductors in order to connect the temporary alternate source conductors. How is the emergency system capable of transferring the loads within ten seconds with this type of disconnection and connection is being performed. This is an on going practice that is being ignored which the NEC does not address. Submitter Full Name: Mike Buettner Organization: [State of Washingtion, Labor and Industries Affilliation: Representing Myself Submittal Date: Mon Nov 03 23:00:45 EST 2014 Panel 13 FD Agenda page of /18/2014 2:46 PM

163 870 of /18/2014 2:46 PM Public Input No NFPA [ New Section after 700.4(B) ] (C) Voltage Regulation. (New) If a voltage range is provided by the equipment manufacturer, feeder and branch circuit conductors shall be sized to provide voltage at the equipment within the range that is required by the manufacturer. In addition, feeder and branch-circuit conductors shall be sized so the voltage at the end of the feeder conductor is not lower than 97% of that at the service or source and for branch circuits, not lower than 95% of the voltage at the service or source at the furthest outlet. Calculations shall be based on circuit loading at 80 percent of the rating of the overcurrent device. It is important for safe and proper operation that conductors be sized properly to provide voltage within the operating range as determined by the manufacturer. While some may opine that this is a requirement of 110.3(B), the rule is not obvious and stating the requirement here will help ensure safe and proper operation of equipment. It is very common for feeder conductors for emergency equipment to be lengthy so it is important that the conductors be sized properly so the electrical systems will perform safely and provide the purpose for which it is intended. Submitter Full Name: Phil Simmons Organization: Simmons Electrical Services Submittal Date: Thu Nov 06 19:42:43 EST 2014 Panel 13 FD Agenda page 133

164 of /25/2014 2:48 PM Public Input No. 95-NFPA [ Section No (A) ] (A) General. The number of transfer switches to be used shall be based on reliability, design, and load consideration. Each branch of the emergency electrical system shall have one or more transfer switches. One transfer switch and downstream distribution system shall be permitted to server one or more branches in a facility with a maximum demand on the essential electrical system of 150 kva. Transfer equipment, including automatic transfer switches, shall be automatic, identified for emergency use, and approved by the authority having jurisdiction. Transfer equipment shall be designed and installed to prevent the inadvertent interconnection of normal and emergency sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Article 705. Article 700 appears to be unclear in respect to Article 517 regarding the number of transfer switches required on other than healthcare electrical systems. This proposal should bring both articles into alignment and may require additional information such as the riser diagrams shown in 517. You may also want to create a term similar to Essential Electrical System for Article 700 that refers to all types of emergency power. Submitter Full Name: W Blair Malcom Organization: PENN STATE UNIVERSITY Submittal Date: Fri Jan 24 09:52:52 EST 2014 Copyright Assignment I, W Blair Malcom, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am W Blair Malcom, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 134

165 856 of /18/2014 2:46 PM Public Input No. 951-NFPA [ Section No (C) ] (C) Automatic Transfer Switches. Automatic transfer switches shall be electrically operated and mechanically held. Automatic transfer switches, rated 1000 VAC and below, shall be listed for and labeled for emergency system use. By adding the word labeled, it will identify that listed products also need to be labeled. Both terms listed and labeled are defined in article 100, but are not used consistently throughout the NEC. If taken literally, as defined in Article 100, a product could be listed and not labeled and still comply with the NEC when not required to be listed and labeled such as in sections 424.6, 646.3(I), and (C) to identify a few. The UL White Book identifies that only those products bearing the appropriate UL Mark and the company's name, trade name, trademark or other authorized identification should be considered as being covered by UL's Certification, Listing, Classification and Follow-Up Service. Therefore, if not identified within the UL Certification Directory as indicated in the definition of listed and bearing the appropriate UL mark as indicated in the definition of labeled the product is not considered by UL to be listed. This is not just UL; all of the test laboratories have a very similar requirement. This change will help make the NEC a more consistent document for AHJ s. Submitter Full Name: JEFFREY FECTEAU Organization: UNDERWRITERS LABORATORIES LLC Submittal Date: Thu Jul 24 20:56:36 EDT 2014 Panel 13 FD Agenda page 135

166 873 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Automatic Transfer Switches. Automatic transfer switches shall be electrically operated and mechanically held. Automatic transfer switches, rated 1000 VAC and below, shall be listed for emergency system use. This Public Input was developed by a Task Group assigned by the NEC Correlating Committee to: (1) resolve issues with actions taken by Code-making Panels 1 and 8 on proposals and comments in the 2014 NEC cycle relative to changing the voltage threshold in articles under their purview from 600 volts to 1000 volts, (2) address indoor and outdoor electrical substations, and (3) evaluate other higher voltage threshold requirements to be included relative to present trends. Members of the Task Group on Over 600 volts for this Public Input included: Alan Manche; Donny Cook; Vince Saporita; Lanny Floyd; Paul Barnhart; Eddie Guidry; Alan Peterson; Tom Adams; David Kendall; Dave Mercier; Tim Pope; and co-chairs Roger McDaniel and Neil F. LaBrake, Jr.; including ad-hoc members Larry Cogburn, CMP-8 Chair and Ken Boyce, CMP-1 Chair. The publication of UL 1008A permits the listing of transfer switches over 1000 V for emergency use. Submitter Full Name: Neil LaBrake Organization: National Grid Submittal Date: Fri Oct 03 13:59:02 EDT 2014 Panel 13 FD Agenda page 136

167 Public Input No NFPA [ Section No (A) ] (A) Derangement. Malfunction To indicate derangement indicate malfunction of the emergency source. The NEC Style Manual states "3.3.4 Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic." The term "derangement" is not commonly used or understood in the industry, it is not included in the Style Manual's list of standard terms nor does it appear anywhere in the NFPA 110 (even thought the reader is directed to that standard for additional information) or in UL2200, the product standard for generator sets. Therefore it should be replace with a more suitable term such as malfunction. Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Sat Nov 01 10:27:43 EDT 2014 Panel 13 FD Agenda page of /18/2014 2:46 PM

168 876 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Emergency Sources. A sign shall be placed at the service-entrance equipment, indicating type and location of on each on -site emergency power sources. Exception: A sign shall not be required for individual unit equipment as specified in (F). with the increased use of emergency power sources, multi tenant buildings can have multiple emergency power sources at different locations, by specifying each, the sign will be specific for each tenant and emergency power sources Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)] Public Input No NFPA [Section No (A)] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Wed Nov 05 14:14:59 EST 2014 Panel 13 FD Agenda page 138

169 875 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Emergency Sources. A sign shall be placed at the service-entrance equipment and at the line voltage metering equipment, indicating type and location of on-site emergency power sources. Exception: A sign shall not be required for individual unit equipment as specified in (F). Fire fighters and utility companies routinely disconnect power by pulling the meter at a site to disconnect power before entering a building, an emergency system that engages due to the loss of power enables an automatic transfer switch to re-energize some or all of the building power. If an automatic transfer switch is installed, A permanent plaque should be installed at the line voltage meter location, or at the site isolation device, to indicate the presence of the re-introduced power and where to disconnect it. (A) Emergency Sources. A sign shall be placed at the service-entrance equipment and at the line voltage metering equipment, indicating type and location of on-site emergency power sources. Exception: A sign shall not be required for individual unit equipment as specified in (F). Fire fighters and utility companies routinely disconnect power by pulling the meter at a site to disconnect power before entering a building, an emergency system that engages due to the loss of power enables an automatic transfer switch to re-energize some or all of the building power. If an automatic transfer switch is installed, A permanent plaque should be installed at the line voltage meter location, or at the site isolation device, to indicate the presence of the re-introduced power and where to disconnect it. Submitter Full Name: william husom Organization: MN DOLI Affilliation: state electrical inspector Submittal Date: Wed Oct 01 20:10:55 EDT 2014 Panel 13 FD Agenda page 139

170 877 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Surge Protection Devices (SPD). A listed SPD shall be installed in or on all emergency systems switchboards and panelboards. The surge protective device shall be permitted to be a Type 1 or Type 2. Surge protective devices shall be installed in accordance with Part II of Article 285. Substantiation - The other location in the NEC that requires an SPD is in Wind Electric Systems, section 694.3(D), Surge Protection Devices (SPD). This proposal aligns the language between the two sections. As all SPDs are required to be listed per section 285.5, that term is redundant. Not allowed are Type 3 SPDs, as they are installed on the load side of branch circuit overcurrent protection and may not provide adequate surge suppression for critical systems. Submitter Full Name: TOM BAKER Organization: Puget Sound Electrical Training Submittal Date: Mon Nov 03 21:31:14 EST 2014 Panel 13 FD Agenda page 140

171 882 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Identification. All boxes and enclosures (including transfer switches, generators, and power panels) for emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system. Exception: Where cables, raceways or the raceway fittings are permanently marked as to be identified as part of the emergency system the boxes shall not also be required to be identified when the other markings make the emergency system obvious. This is the companion public input to If the change to is accepted in any form it would be a good idea to offer this exception for more than 1 reason. In areas where boxes are not encountered the installer chooses to use another method it would be prudent to allow the installer to be consistent. It would be unnecessary and overly restrictive when an alternate method is used to also require the boxes and enclosures to be identified. Adding this exception or somehow including this in the main body of the article is only fair. Submitter Full Name: james dorsey Organization: Douglas county Building Department, Douglas County. Co Submittal Date: Mon Oct 27 22:12:35 EDT 2014 Panel 13 FD Agenda page 141

172 Public Input No NFPA [ Section No (A) ] (A) Identification. All boxes and enclosures (including transfer switches, generators, and power panels) for emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system. Where boxes or enclosures are not encountered the cable or raceway system shall be permanently marked to be identified as a component of the emergency system. Today s trend is to order conduit of a different color for larger projects such as hospitals (Colorado usually uses yellow for life safety) another method is coloring the connectors and couplings. For cables, such as mc, spray painting with non-corrosive paint also is an easy, cost effective method. Limiting the only method to boxes is not only restrictive but not of much help to the service electrician or inspector. Many boxes are buried in the floor, hard lid ceiling or often there is not any boxes to identify, such as when daisy chaining emergency light to emergency light which sometimes can be every few lights or very sporadic and extremely difficult to follow as an inspector or installer. The fact is that this change is necessary to help educate all parties. This change or any change that helps to identify the emergency circuit will be a step in the right direction. I am sending a companion proposal that would add the exception that boxes would not require identification where other means are being utilized Submitter Full Name: james dorsey Organization: Douglas county Building Department, Douglas County Co Submittal Date: Mon Oct 27 22:03:24 EDT of /18/2014 2:46 PM

173 880 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Identification. All boxes and enclosures (including transfer switches, generators, and power panels, surface metal raceways, and surface nonmetallic raceways ) for emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system. Despite explicit CMP-13 Statements in the past confirming the intent of (B) s wording kept ENTIRELY independent of all other wiring and equipment, manufacturers of surface raceways continue to encounter opportunistic misinterpretations by specifiers attempting to use separate channels of the SAME MULTI-CHANNEL surface raceways for emergency system circuits and for normal power circuits. Manufacturers remain concerned that such installations that misapply multi-channel surface raceways for mixed emergency system circuits and normal power circuits will expose subsequent servicers to risk of shock when accessing a mixture of circuits. Marked identification of surface raceways as being intended only for use with emergency system circuits would further enforcement to preclude such (B) violations. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)(1)] Relationship same type of installation misapplying multi-channel surface raceways in violation of NEC requirements Submitter Full Name: Brian Rock Organization: Hubbell Incorporated Submittal Date: Fri Oct 24 15:10:12 EDT 2014 Panel 13 FD Agenda page 143

174 878 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Identification. All boxes and enclosures (including transfer switches, generators, and power panels) for emergency circuits shall be permanently marked so they will be readily identified as a component of an emergency circuit or system. For receptacles supplied from the emergency system, the cover plates for those receptacles or the receptacles themselves shall have a distinctive color or marking so as to be readily identifiable. Nonlocking-type, 125-volt, 15- and 20-ampere receptacles supplied from the emergency system shall have an illuminated face or an indicator light to indicate that there is power to the receptacle. Fulfilling duty-to-warn that is associated with the material and process associated with putting equipment in place and making it ready for use in accordance with performance requirements. This proposed requirement is similar to existing (A)(2). If those receptacles for cord-and-plug-connected equipment have been deemed by the system designer to warrant supply from the emergency system, then servicers of such receptacles should be forewarned that such receptacles that test out as unenergized could suddenly become energized. Being able to distinguish receptacles supplied from the emergency system becomes more critical as receptacles controlled for the purpose of energy management or building automation [see 406.3(E)] become more prevalent. While 406(E) requires identification marking of energymanagement-controlled receptacles, receptacles supplied by emergency systems are presently not required (except in specific Special Occupancies such as nursing homes and care facilities) to be identified to the servicers, thereby putting servicers at risk of shock. It is essential that nonlocking-type 125-volt, 15- and 20-ampere receptacles (NEMA configurations 5-15R and 5-20R) have additional identification by either an indicator light or an illuminated face so that the servicer knows that they are energized since they might BECOME LATER misidentified. Such nonlocking-type 125-volt, 15- and 20-ampere receptacles are commonly used in dwelling units, commercial and industrial occupancies. As indicated by Comment (Log #369) submitted during last Code cycle by National Electrical Manufacturers Association (NEMA) with respect to nursing home and limited care facilities having emergency systems, there were reports by electrical contractors to NEMA of facilities undergoing renovations in which prior maintenance replacements (unauthorized) of cover plates and receptacles on circuits intended for normal-power electrical loads have used red cover plates or receptacles [and vice versa], the distinctive color intended in those facilities for emergency system circuits. These smaller facilities typically may not have trained staff electricians on-site and on-call. It is not unusual for people in their own dwelling units and in commercial and industrial occupancies to remove cover plates for painting and wallpapering, and to replace these common receptacles and cover plates themselves, without calling in an electrician. When this common do-it-yourself mentality is carried over in practice to facilities with receptacles supplied from emergency systems under NEC Article 700 requirements, it s highly unlikely that these do-it-yourselfer are trained in or knowledgeable of the NEC emergency systems requirements, especially with regard to identification of receptacles supplied from the emergency systems. Consequently, NEMA 5-15R and 5-20R receptacles supplied from emergency systems may BECOME unidentified, and similarly NEMA 5-15R and 5-20R receptacles supplied solely from normal power systems may BECOME misidentified simply because any replacement cover plates or receptacles on-hand are only those left over in that distinctive color intended in those facilities for emergency system circuits. While there is also a performance benefit of identifying receptacles supplied from the emergency system so that they can connect cord-and-plug-connected equipment to those receptacles energized during normal power outages, this performance benefit is incidental to the safety installation benefit to servicers when putting equipment in place and making it ready for use in accordance with performance requirements. Submitter Full Name: Brian Rock Organization: Hubbell Incorporated Panel 13 FD Agenda page 144

175 883 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Wiring. Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in (B) (1) through (5): (1) Wiring from the normal power source located in transfer equipment enclosures (2) Wiring supplied from two sources in exit or emergency luminaires (3) Wiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminaires (4) Wiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipment (5) Wiring from an emergency source to supply emergency and other loads in accordance with (B) (5)a, b, c, and d as follows: (6) Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads from all other loads. (7) The common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures shall be permitted to be supplied by single or multiple feeders without overcurrent protection at the source. Exception to (5)b: : Overcurrent protection shall be permitted at the source or for the equipment, provided that the overcurrent protection complies with the requirements of a. Emergency circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits. b. It shall be permissible to utilize single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads. Removing the Exception to (5)b results in more efficient, and therefor less confusing, code language. NEC 90.5 states that "shall be permitted" ia a permisive rule that is allowed but not required. Therefor if (5)b did not state that is permissable to not have overcurrent protection at the source, overcurrent protection at the source would be required, consistant with Section clearly requires overcurrent protection at the source so an Exception permitting it is not necessary or needed. Similarly, nothing is to be gained by referencing in this paragraph as already applies to all emergency system overcurrent protection devices. Its just counter intuitive to have an Exception to permissive rule. Delete this Exception! Submitter Full Name: James Degnan Organization: Sparling Affilliation: ASHE Submittal Date: Mon Nov 03 20:22:55 EST 2014 Panel 13 FD Agenda page 145

176 of /25/2014 2:49 PM Public Input No. 104-NFPA [ Section No (B) ] (B) Wiring. Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in (B) (1) through (5): (1) Wiring from the normal power source located in transfer equipment enclosures (2) Wiring supplied from two sources in exit or emergency luminaires (3) Wiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminaires (4) Wiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipment (5) Wiring from an emergency source to supply emergency and other loads in accordance with (B)(5)a, b, c, and d as follows: a. Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads from all other loads. b. The common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures shall be permitted to be supplied by single or multiple feeders without overcurrent protection at the source. Exception Exception to (5)b: : Overcurrent protection shall be permitted at the source or for the equipment, provided that the overcurrent protection complies with the requirements of If an optional standby system is fed from a common breaker that also feeds an emergency and/or legally required standby system(s), selective coordination shall be provided on the optional system to prevent the unintentional opening of this overcurrent device. c. Emergency circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits. d. It shall be permissible to utilize single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads. Currently the code only requires the emergency and legally required standby systems to be selectively coordinated but not the optional standby system. If an optional standby system is supplied by a generator that has a single overcurrent device that also supplies emergency and/or legally required standby system(s), there is a possibility that a fault in the optional system could open the generator overcurrent device. This change would only required the selective coordination of an optional standby system under this condition. Submitter Full Name: Brian Schewe Organization: City of Appleton Submittal Date: Mon Jan 27 10:13:56 EST 2014 Panel 13 FD Agenda page 146

177 885 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Wiring. Wiring of two or more emergency Emergency System circuits supplied from the same Emergency System source shall be permitted in the same raceway, cable, box, or cabinet. Wiring from an emergency Emergency System source or emergency Emergency System source distribution overcurrent protection device to emergency loads Emergency System loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in (B) (1) through (5): (1) Wiring from the normal power source located in transfer equipment enclosures (2) Wiring supplied from two sources in exit or emergency luminaires (3) Wiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminaires (4) Wiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipment (5) Wiring from an emergency Emergency System source to supply emergency Emergency System loads and other loads in systems loads shall be in accordance with (B) (5)a, b, c, and d as follows: (6) Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads a. Emergency System loads from all other loads a. non Emergency Sytem loads. b. The common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures shall be permitted to be supplied by single or multiple feeders without overcurrent protection at the source. Exception to (5)b: : Overcurrent protection shall be permitted at the source or for the equipment, provided that the overcurrent protection complies with the requirements of c. Emergency circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits. d. It shall be permissible to utilize single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads. Clarify that it is other types of loads that are to be separated from the Emergency Systems loads. Submitter Full Name: CHRISTOPHER BROWN Organization: EWING COLE Submittal Date: Fri Nov 07 05:52:33 EST 2014 Panel 13 FD Agenda page 147

178 884 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Wiring. Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in (B) (1) through (5): (1) Wiring from the normal power source located in transfer equipment enclosures (2) Wiring supplied from two sources in exit or emergency luminaires (3) Wiring from two sources in a listed load control relay supplying exit or emergency luminaires, or in a common junction box, attached to exit or emergency luminaires (4) Wiring within a common junction box attached to unit equipment, containing only the branch circuit supplying the unit equipment and the emergency circuit supplied by the unit equipment (5) Wiring from an emergency source to supply emergency and other loads in accordance with (B) (5)a, b, c, and d as follows: (6) Separate vertical switchgear sections or separate vertical switchboard sections, with or without a common bus, or individual disconnects mounted in separate enclosures shall be used to separate emergency loads from all other loads. (7) The common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures shall be permitted to be supplied by single or multiple feeders without overcurrent protection at the source. Exception to (5)b: : Overcurrent protection shall be permitted at the source or for the equipment, provided that the overcurrent protection complies with the requirements of (8) Emergency system circuits shall not originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure, or individual disconnect enclosure as other circuits serving Legally Required Standby Systems, Optional Standby Systems or Critical Operations Power Systems. (9) It shall be permissible to utilize single or multiple feeders to supply distribution equipment between an emergency source and the point where the emergency loads are separated from all other loads. Clarify that multiple Emergency Systems circuits can originate from the same vertical switchgear section, vertical switchboard section, panelboard enclosure or individual disconnect enclosure and it is the other listed system circuits that should be separated. Submitter Full Name: CHRISTOPHER BROWN Organization: EWING COLE Submittal Date: Fri Nov 07 05:24:58 EST 2014 Panel 13 FD Agenda page 148

179 886 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Wiring Design and Location. (1) Emergency wiring circuits shall be designed and located so as to minimize the hazards that might cause failure due to flooding, fire, icing, vandalism, and other adverse conditions. (2) Emergency feeder circuits and equipment shall not be installed in the same room with normal service equipment,where the service equipment is rated over 150 volts to ground and equal to or greater than 1000 amperes. this text in this section is taken from NFPA 110, and is a requirement for a professional designing a system. Many electricians are not aware of this requirement. Including this section will inform the electrician and provide addition integrity to the installation. Submitter Full Name: Alfio Torrisi Organization: Master Electrician Submittal Date: Fri Oct 31 14:52:24 EDT 2014 Panel 13 FD Agenda page 149

180 889 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) [Excluding any Sub-Sections] ] Emergency systems shall meet the additional requirements in (D)(1) through (D)(3) in assembly occupancies for not less than 1000 persons or in buildings above 23 m (75 ft) in height. Currently, as written, the requirements for fire protection of emergency systems and feeders applies only to large places of assembly and high-rise buildings. I believe that the requirements that follow in sections (1), (2) and (3) should be required in any building, regardless of classification. In (A), a storage battery used for emergency system lighting must have capacity to maintain the load for 90 minutes. Consider the following: A 3 story, 30,000 gsf office building with no generator requires emergency lighting to be available for 90 minutes; a 4 story, 100,000 hospital, that requires an emergency generator, does not fall under the requirements of (D), and is not required to follow (D)(1) for fire protection of feeder-circuit wiring,and therefore the feeder conductors could fail in a fire in less than 60 minutes. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No [Excluding any Sub-Sections]] Relationship Submitter Full Name: Daniel Caron Organization: Bard, Rao + Athanas Consulting Engineers Submittal Date: Wed Nov 05 14:27:05 EST 2014 Panel 13 FD Agenda page 150

181 888 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) [Excluding any Sub-Sections] ] Emergency systems shall meet the additional requirements in (D)(1) through (D)(3) in assembly occupancies for not less than 1000 persons or in buildings above 23 m (75 ft) in height. The requirements to protect emergency feeders and emergency feeder equipment should not be limited to the occupancies listed. Many large buildings such as hospitals, office buildings, and retail buildings with large occupancy loads should be required to have their emergency feeders and distribution equipment protected from attack by fire. Such provisions enhance the likelihood of safe evacuation of occupants in the event of a fire emergency. Note that the suggested limitations in this public input apply on a feeder level, and be unlikely to have an adverse financial impact on smaller buildings and establishments where the principal emergency loads are exclusively fed by branch circuits, or feeders of extremely limited extent. Submitter Full Name: Frederic Hartwell Organization: Affilliation: Massachusetts Electrical Code Advisory Committee Submittal Date: Sun Oct 26 17:04:21 EDT 2014 Panel 13 FD Agenda page 151

182 858 of /18/2014 2:46 PM Public Input No. 144-NFPA [ Section No (D) [Excluding any Sub-Sections] ] Emergency systems shall meet the additional requirements in (D)(1) through (D)(3) in assembly occupancies for not less than 1000 persons or in buildings above 23 m (75 ft) in height. Exception: In the event of a failure of existing emergency system equipment or wiring, temporary wiring or equipment shall be permitted to be installed in accordance with Art. 590 Relief is needed from the stringent fire protection requirements in situations where the original generator, transfer switch, or wiring fails or needs to be repaired. In this case a temporary portable or vehicle mounted generator may be quickly brought in and wired temporarily, or perhaps a temporary emergency feeder could be run quickly from a different switchboard or transfer switch while the faulty equipment or wiring is being repaired or replaced. In these urgent situations it may be nearly impossible for all of the temporary equipment or wiring to be installed quickly and in accordance with (D). Since 590.2(A) requires that ALL requirements for permanent wiring apply to temporary wiring, this exception is needed because no other sections of Article 590 modify these specific requirements of Article 700. This proposed exception is a permissive rule and is only intended to allow the option of a short term solution to be executed quickly and safely until permanent repairs can be made. Even with the best preventive maintenance plans and contingency plans, equipment failures happen. They can happen suddenly and unexpectedly. It can happen from mechanical breakdown or it can happen from storms, floods, earthquakes, or fires. When these failures happen, rapid solutions are needed. This new exception will allow temporary solutions to happen rapidly and safely. Submitter Full Name: RUSS LEBLANC Organization: EC AND M MAGAZINE Submittal Date: Sun Feb 02 13:36:29 EST 2014 Panel 13 FD Agenda page 152

183 887 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) [Excluding any Sub-Sections] ] Emergency systems shall meet the additional requirements in (D)(1) through (D)(3) in assembly occupancies for not less than 1000 persons or in buildings above 23 m (75 ft) in height. The requirements to protect emergency feeders and emergency feeder equipment should not be limited to the occupancies listed. Many large buildings such as hospitals, office buildings and retail buildings with large occupancy loads should be required to have their emergency feeders and emergency feeder equipment protected from attack by fire, to enhance the safe evacuation of the occupants in the event of a fire emergency. Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Wed Sep 10 07:30:35 EDT 2014 Panel 13 FD Agenda page 153

184 890 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D)(1) ] (1) Feeder-Circuit Wiring. Feeder-circuit wiring shall have a 2 hour fire resistive rating and meet one of the following conditions: (1) Be installed in spaces or areas that are fully protected by an approved automatic fire suppression system (2) Be a listed electrical circuit protective system with a minimum 2-hour fire rating (1) Informational Note: UL guide (1) the listing organization provides information for electrical circuit protective systems (FHIT) contains information (1) (2) Be on proper installation requirements to maintain the fire rating. protected by a listed thermal barrier system for electrical system components with a minimum 2-hour fire rating Be protected by a listed fire-rated assembly that has a minimum fire rating of 2 hours and contains only emergency wiring circuits Be encased in a minimum of 50 mm (2 in.) of concrete (1) a fire resistive cable system Additional Proposed Changes File Name _D_1_changes.docx Description Approved Electrical circuit protective systems are tested to UL Subject 1724 which protect electrical wiring systems using thermal barrier which limits the temperature the wiring systems will be exposed to thus maintaining circuit integrity. A fire resistive cable system in tested to UL 2196 and test the electrical cables when exposed directly to the fire. Both systems use the same ASTM E119 time temperature curve and exposure to a hose stream test. An electrical circuit protective system can include concrete encased wiring system and protective assemblies wiring systems such as dry wall assemblies therefore UL 1724 should cover all other types of protective methods. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)(2)] Relationship Submitter Full Name: James Conrad Organization: RSCC Wire & Cable Affilliation: CDA Panel 13 FD Agenda page 154

185 700.10(D) (1) Feeder-Circuit Wiring. Feeder-circuit wiring shall have a 2 hour fire resistive rating and meet one of the following conditions: 1. Be installed in spaces or areas that are fully protected by an approved automatic fire suppression system 2. Be a listed electrical circuit protective system with a minimum Informational Note: the listing organization provides information for electrical circuit protective systems on proper installation requirements to maintain the fire rating. 3. Be a fire resistive cable system

186 892 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D)(2) ] (2) Feeder-Circuit Equipment. (1) Equipment for feeder circuits (including transfer switches, transformers, and panelboards) shall be located either in spaces fully protected by approved automatic fire suppression systems (including sprinklers, carbon dioxide systems) or in spaces with a 2-hour fire resistance rating. (2) Equipment for feeder circuits (including transfer switches, transformers, and panelboards) shall not be located in the same room with the normal service equipment, where the service equipment is rated over 150 volts to ground and equal to or greater than 1000 amperes. [110: 7.2.3] Informational note: For additional installation and environmental considerations see NFPA Chapter 7. Standard for Emergency and Standby Power Systems. Adding a second subsection with extract material from NFPA 110 will insure that the added fire protection required in NFPA 110 is adhered to. The Informational note directing the users of the code to NFPA 110 Chapter 7 will enhance the reliability of the Emergency Power Supply System by describing other installation and environmental considerations required in NFPA 110. Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Tue Oct 07 08:54:13 EDT 2014 Panel 13 FD Agenda page 155

187 893 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D)(3) ] (3) Generator Control Wiring shall meet the requirements of (1). and (2). (1). Control conductors installed between the transfer equipment and the emergency generator shall be kept entirely independent of all other wiring and shall meet the conditions of (D) (1) (2). A failure or opening of the generator (normally closed) remote start loop shall result in a generator start signal. Adding this requirement will insure that there will be power to the emergency terminals of the transfer equipment in the event of structural failure to the generator start circuit. It will also supervise the start circuit under normal conditions, in that an open/failure of the start circuit will start the generator and alert the occupants that, in the event of the loss of normal power, emergency power will not be available. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (F)] Relationship Submitter Full Name: Lawrence Forshner Organization: Bard, Rao + Athanas Consulting Affilliation: self Submittal Date: Wed Oct 29 14:56:40 EDT 2014 Panel 13 FD Agenda page 156

188 859 of /18/2014 2:46 PM Public Input No. 880-NFPA [ Section No [Excluding any Sub-Sections] ] Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in (A) through (E). Unit equipment in accordance with (F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in (A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes assembly, educational, residential, detention and correctional, business, and mercantile shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating shall comply with (D). Informational Note No. 1 : For the definition of Occupancy Classification, see Section 6.1 of NFPA , Life Safety Code. Informational Note No. 2: For further information, see ANSI/IEEE , Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems. This will promote consistency; it appears that the changes to (D) for the 2014 NEC were not coordinated with Submitter Full Name: JEFFREY FECTEAU Organization: UNDERWRITERS LABORATORIES LLC Submittal Date: Thu Jul 24 13:54:37 EDT 2014 Panel 13 FD Agenda page 157

189 897 of /18/2014 2:46 PM Public Input No NFPA [ Section No [Excluding any Sub-Sections] ] Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in (A) through (E). Unit equipment in accordance with (F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in (A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes assembly, educational, residential, detention and correctional, business, and mercantile shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating shall meet the requirements of (D). Informational Note No. 1: For the definition of Occupancy Classification, see Section 6.1 of NFPA , Life Safety Code. Informational Note No. 2: For further information, see ANSI/IEEE , Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems. Fire protection for the source(s) of emergency power should be consistent with the requirements for the distribution it serves. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (D) [Excluding any Sub-Sections]] Relationship Submitter Full Name: Daniel Caron Organization: Bard, Rao + Athanas Consulting Engineers Submittal Date: Wed Nov 05 14:58:19 EST 2014 Panel 13 FD Agenda page 158

190 896 of /18/2014 2:46 PM Public Input No NFPA [ Section No [Excluding any Sub-Sections] ] Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in (A) through (E). Unit equipment in accordance with (F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in (A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes assembly, educational, residential, detention and correctional, business, and mercantile shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating. Informational Note No. 1: For the definition of Occupancy Classification, see Section 6.1 of NFPA , Life Safety Code. Informational Note No. 2: For further information, see ANSI/IEEE , IEEE Std , IEEE Recommended Practice for Determining the Design of Reliable Reliability of 7x24 Continuous Power Systems in Industrial and Commercial Power Systems Facilities. IEEE 493 has been superseded by IEEE Submitter Full NEAL DOWLING Name: Organization: MTechnology IEEE Industrial Applications Society, Vice Chair of Reliability Affilliation: Subcommittee Submittal Date: Fri Oct 31 09:59:38 EDT 2014 Panel 13 FD Agenda page 159

191 895 of /18/2014 2:46 PM Public Input No NFPA [ Section No [Excluding any Sub-Sections] ] Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in (A) through (E). Unit equipment in accordance with (F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building.when a building is occupied during a normal power outage, the branch circuit(s) supplying battery powered emergency lighting shall be remain energize. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in (A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes assembly, educational, residential, detention and correctional, business, and mercantile shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating. Informational Note No. 1: For the definition of Occupancy Classification, see Section 6.1 of NFPA , Life Safety Code. Informational Note No. 2: For further information, see ANSI/IEEE , Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems. Power outages have become more commonly associated with the loss of the normal power supply due to vehicular accidents or weather events. In most cases, the building owner has an optional standby system installed and core functions are keep on line with employees occupying the building. In events lasting over and hour and a half the battery powered emergency lighting would be depleted leaving egress paths unlit. This new requirement would insure this egress path way remains lighted and battery's remain charged in an event that requires the building to be evacuated. Submitter Full Name: Alfio Torrisi Organization: Master Electrician Submittal Date: Thu Oct 30 07:22:37 EDT 2014 Panel 13 FD Agenda page 160

192 894 of /18/2014 2:46 PM Public Input No NFPA [ Section No [Excluding any Sub-Sections] ] Current supply shall be such that, in the event of failure of the normal supply to, or within, the building or group of buildings concerned, emergency lighting, emergency power, or both shall be available within the time required for the application but not to exceed 10 seconds. The supply system for emergency purposes, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in (A) through (E). Unit equipment in accordance with (F) shall satisfy the applicable requirements of this article. In selecting an emergency source of power, consideration shall be given to the occupancy and the type of service to be rendered, whether of minimum duration, as for evacuation of a theater, or longer duration, as for supplying emergency power and lighting due to an indefinite period of current failure from trouble either inside or outside the building. Equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding, fires, icing, and vandalism. Equipment for sources of power as described in (A) through (E) where located within assembly occupancies for greater than 1000 persons or in buildings above 23 m (75 ft) in height with any of the following occupancy classes assembly, educational, residential, detention and correctional, business, and mercantile shall be installed either in spaces fully protected by approved automatic fire suppression systems (sprinklers, carbon dioxide systems, and so forth) or in spaces with a 1-hour fire rating. Informational Note No. 1: For the definition of Occupancy Classification, see Section 6.1 of NFPA , Life Safety Code. Informational Note No. 2: For further information, see ANSI/IEEE 493 P , Recommended Practice for Improving the Design Reliability of Reliable Industrial and Commercial Emergency and Stand-By Power Systems. ANSI/IEEE 493 will be replaced with up to date guidance that will appear P Recommended Practice for Improving the Reliability of Emergency and Stand-By Power Systems. A copy of this document will be made available to this committee through the IEEE Standards Association. Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE Industrial and Commercial Power Systems Education and Health Affilliation: Care Facility Electrotechnology Committee Submittal Date: Mon Oct 20 20:47:59 EDT 2014 Panel 13 FD Agenda page 161

193 898 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Storage Battery. Storage batteries used as a source of power for emergency systems shall be of suitable rating and capacity to supply and maintain the total load for a minimum period of hours, without the voltage applied to the load falling below percent of normal. Batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service and shall be compatible with the charger for that particular installation. For a sealed battery, the container shall not be required to be transparent. However, for the lead acid battery that requires water additions, transparent or translucent containers shall be furnished. Automotive-type batteries shall not be used. An automatic battery charging means shall be provided. the load equipment manufacturer s minimum operating range. Informational Note: Battery systems are described in 480. Battery systems used as a source of emergency power are fully described in NFPA 111. As battery chemistries other than lead-acid or nickel-cadmium become used in back-up emergency power systems, the code needs to evolve to consider them and not be lead-acid or nickel-cadmium specific. Some batteries can drop as low as 50% of nominal voltage with no problems, but the load equipment must determine what voltage range is acceptable. The deleted paragraphs are addressed in the referenced document and article identified in a new informational note. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Tue Oct 28 20:54:55 EDT 2014 Panel 13 FD Agenda page 162

194 860 of /18/2014 2:46 PM Public Input No. 274-NFPA [ Section No (B)(6) ] (6) Outdoor Generator Sets. Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with , and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of Exception 1 : An additional disconnecting means not required as permitted by (6) need not meet the requirements of Exception 2: For installations under single management, where conditions of maintenance and supervision ensure that only qualified persons will monitor and service the installation and where documented safe switching procedures are established and maintained for disconnection, the generator set disconnecting means shall not be required to be located within sight of the building or structure served. In certain circumstances a transfer switch may be considered a disconnecting means as per article 100 definitions. This is especially true if the transfer switch is service rated. A strict reading of section (B)(6) could be construed to require a disconnecting means at the building otherwise not required but installed in order to provide a transfer function to meet the requirements of The exception would make clear that such disconnecting means, otherwise not required by this section is not mandated to meet the requirements of section Submitter Full Name: David Humphrey Organization: Submittal Date: Wed Feb 12 08:51:04 EST 2014 Panel 13 FD Agenda page 163

195 of /25/2014 3:12 PM Public Input No NFPA [ New Section after (B) ] TITLE OF NEW CONTENT (B) (7) A Grounded Non-separtely derived system. Type your content here... A non-separately derived generator shall not supply more than one transfer switch under the following conditions A service disconnect and a feeder that is supplied from another set of service entrance conductors. Two or more feeders supplied from different sets of service entrance conductors. Two or more feeders that are individually supplied from different separately derived sources. Two or more feeders with one of the feeders supplying emergency load(s). Additional Proposed Changes File Name Description Approved img004.pdf Parallel path img005.pdf load side connection img006.pdf Lost or broken Neutral A non-separately derived generator supplying any down stream feeder panels supplied from different main service disconnects will see the neutral to ground connection (main bonding connection) from the main service disconnect of the other main service disconnect creating a parallel path and a violation of 250.6, even folks that understand section do not realize the other service main bonding jumper creates a neutral to ground connection downstream in a feeder panel when supplied from a non-separately derived generator connection. Section (A) (5) address the load side of a main service disconnect neutral to bond connection. This is not a load side connection but one from another main service panel or separately derived system. Connecting the generator non-separately derived will create a parallel path and if one of the panels lost a neutral the other service neutral would be overloaded. This section will not preclude more than two main services panels supplied from a common service from being supplied by a non-separately derived generator This new section will remove this potential hazard and will make it clear this type of installation is not permitted. Submitter Full Name: Alfio Torrisi Organization: Master electrician Submittal Date: Wed Oct 29 20:32:17 EDT 2014 Panel 13 FD Agenda page 164

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199 of /25/2014 3:12 PM Copyright Assignment I, Alfio Torrisi, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am Alfio Torrisi, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 165

200 863 of /18/2014 2:46 PM Public Input No. 624-NFPA [ Section No (F)(2) ] (2) Installation of Unit Equipment. Unit equipment shall be installed in accordance with (F) (2)(1) through (6). (1) The batteries shall be of suitable rating and capacity to supply and maintain at not less than percent of the nominal battery voltage for the total lamp load associated with the unit for a period of at least hours, or the unit equipment shall supply and maintain not less than 60 percent of the initial emergency illumination for a period of at least hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service. (2) Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. (3) The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits that are not part of a multiwire branch circuit, a separate branch circuit for unit equipment that is not part of a mul wire branch circuit shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. lockable disconnec ng means in accordance with (4) The branch circuit that feeds unit equipment shall be clearly identified at the distribution panel. (5) Emergency luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment as required by and by one of the wiring methods of Chapter 3. (6) Remote heads providing lighting for the exterior of an exit door shall be permitted to be supplied by the unit equipment serving the area immediately inside the exit door. Two issues to address: (1) As currently written in the 2014 NEC, the three normal lighting circuits cannot be part of a multiwire branch circuit, but the separate branch circuit for unit equipment permitted by this exception COULD be part of a multiwire branch circuit. The whole reason for the revision to the exception in the 2014 NEC was to avoid leaving the area in total darkness if one circuit were to trip and cause the others to open as a result. This was not accomplished with the existing text. (2) What is a lock-on feature? This lock-on feature simply needs to comply with the 2014 NEC added provisions of Submitter Full Name: L. Keith Lofland Organization: International Association of Electrical Inspectors (IAEI) Affilliation: None Submittal Date: Tue May 27 17:27:50 EDT 2014 Panel 13 FD Agenda page 166

201 902 of /18/2014 2:46 PM Public Input No NFPA [ Section No (F)(2) ] (2) Installation of Unit Equipment. Unit equipment shall be installed in accordance with (F) (2)(1) through (6). (1) The batteries shall be of suitable rating and capacity to supply and maintain at not less than percent of the nominal battery voltage for the to supply the total lamp load associated with the unit for either ( a) or (b): (a) a period of at least hours, or the unit equipment shall supply and maintain 11 2 hours without the voltage falling below the lamp equipment manufacturer s minimum operating voltage range; or ( b) not less than 60 percent of the initial emergency illumination for a period of at least hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service. Informational Note: Battery systems are described in 480. Battery systems used as a source of emergency power are fully described in NFPA 111. (2) Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. (3) The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits that are not part of a multiwire branch circuit, a separate branch circuit for unit equipment shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. (4) The branch circuit that feeds unit equipment shall be clearly identified at the distribution panel. (5) Emergency luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment as required by and by one of the wiring methods of Chapter 3. (6) Remote heads providing lighting for the exterior of an exit door shall be permitted to be supplied by the unit equipment serving the area immediately inside the exit door. As battery chemistries other than lead-acid or nickel-cadmium begin to be used in emergency power systems, the Code needs to evolve to consider them and not be lead-acid or nickel-cadmium specific. Some batteries can drop as low as 50% of nominal voltage with no problems, but the load equipment must determine the voltage range. The text is rearranged into bullet form in compliance with the manual of style. The deleted text is addressed in the referenced article and document identified in a new informational note. Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Panel 13 FD Agenda page 167

202 900 of /18/2014 2:46 PM Public Input No NFPA [ Section No (F)(2) ] (2) Installation of Unit Equipment. Unit equipment shall be installed in accordance with (F) (2)(1) through (6). (1) The batteries shall be of suitable rating and capacity to supply and maintain at not less than percent of the nominal battery voltage for the total lamp load associated with the unit for a period of at least hours, or the unit equipment shall supply and maintain not less than 60 percent of the initial emergency illumination for a period of at least hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service. (2) Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. (3) The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits that are not part of a multiwire branch circuit, a separate branch circuit for unit equipment shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. (4) The branch circuit that feeds unit equipment shall be clearly identified at the distribution panel. (5) Emergency luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment as required by and by one of the wiring methods of Chapter 3. (6) Remote heads providing lighting Where the normal power branch circuits that supply luminaries providing illumination immediately on the inside and outside of exit doors are supplied by the same service and feeder, the remote heads providing emergency illumination for the exterior of an exit door shall be permitted to be supplied by the unit equipment serving the area immediately inside the exit door. Additional Proposed Changes File Name Kines_Art._ docx Description Approved Copy of PI This section as written in the NEC creates multiple situations for the required exterior Emergency lighting to fail to provide the required Emergency lighting. The problem is large buildings such as multi-tenant buildings are typically fed from multiple Services that feeds a separate House Service for all exterior lighting and equipment and additional Services for Tenant spaces in the building. The loss of partial power to the building, power failure in Feeders, circuits, or equipment failure could create situations where public exiting the building would be directed to exits without any exterior normal or emergency illumination to the Public Way. This change in language to (6) will help to ensure that the normal or emergency illumination on the exterior of the building will be provided in any emergency situation. Luminaires listed for wet/damp locations are available that can provide both the normal and emergency lighting for these locations to comply with both International Building Code and the National Electrical Code. Submitter Full Name: Haywood Kines Organization: Prince William County Building Panel 13 FD Agenda page 168

203 861 of /18/2014 2:46 PM Public Input No NFPA [ Section No (F)(2) ] (2) Installation of Unit Equipment. Unit equipment shall be installed in accordance with (F) (2)(1) through (6). (1) The batteries shall be of suitable rating and capacity to supply and maintain at not less than percent of the nominal battery voltage for the total lamp load associated with the unit for a period of at least hours, or the unit equipment shall supply and maintain not less than 60 percent of the initial emergency illumination for a period of at least hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service. (2) Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. (3) The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits that are not part of a multiwire branch circuit, a separate branch circuit for unit equipment shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. (4) The branch circuit that feeds unit equipment shall be clearly identified at the distribution panel. (5) Emergency luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment as required by and by one of the wiring methods of Chapter 3. (6) Remote heads providing lighting for the exterior of an exit door shall be permitted to be supplied by the unit equipment serving the area immediately inside the exit door. The change to add item (6), formerly Exception No. 2 under 2011 NEC section (F), was added based upon the submitter's statement which read in part; "...will allow a practice which is commonly done in the State where I inspect electrical wiring, this practice also appears to take place in other areas of the United States, as Electrical Engineers from other areas of the United States designs include this concept." This change was enacted in part because individuals either did not understand the requirements of the National Electrical Code or were using an alternative design that presumably meant to provide an equivalent level of protection. This proposal, when accepted actually reduced the level of protection and should be removed in its entirety. Unit equipment which includes both packaged units (consisting of one or more external lights with and an internal battery) as well as the systems that incorporate a larger battery that in turn powers remote heads that are not mounted with the battery, have always been required to be supplied by the circuit(s) that also supply the normal lighting in the area served by both the unit equipment AND the normal lighting, the exception notwithstanding. The reasons for this were to assure a minimum level of lighting in any area should there be a failure of the normal lighting system in that area. Emergency systems, no matter how robust, are ineffective if the systems do not detect a loss of power in the area served. The NEC does not allow, and to the best of my knowledge never has allowed, unit equipment in any form to serve an area if the system is not connected to a battery which in turn is connected to the normal lighting serving that area. The danger of losing emergency lighting in an area that emergency lighting is required by any code introduces an unacceptable level of hazard to the occupants to safely egress from the facility. Various building codes require emergency lighting for rooms, areas or spaces when there is an elevated hazard to the occupants. The hazards vary and range from high or extreme health hazards to the number of occupants in a room or space. When emergency lighting is required by the building codes, it becomes part of the required egress system that allows occupants to quickly and safely exit a facility. Egress lighting has always been required on the exterior of buildings however emergency lighting was recently added by at least one model code to the exterior egress system as well. Panel 13 FD Agenda page 169

204 865 of /18/2014 2:46 PM Public Input No. 697-NFPA [ Section No ] Emergency Illumination. Emergency illumination shall include all required means of egress lighting, illuminated exit signs, and all other lights luminaires specified as necessary to provide required illumination. Emergency lighting systems shall be designed and installed so that the failure of any individual lighting element, such as the burning out of a lamp, cannot leave in total darkness any space that requires emergency illumination. Where high-intensity discharge lighting such as high- and low-pressure sodium, mercury vapor, and metal halide is used as the sole source of normal illumination, the emergency lighting system shall be required to operate until normal illumination has been restored. Where an emergency system is installed, emergency illumination shall be provided in the area of the disconnecting means required by and , as applicable, where the disconnecting means are installed indoors. Exception: Alternative means that ensure that the emergency lighting illumination level is maintained shall be permitted. The modification addresses two problems; 1. Building codes may have two levels of illumination specifed for egress paths: one for when normal power is available( say 10FC in a stariway) and one for when the egress lighting system is on emergency power (say an average of 1FC along the egress path). The phrase "all required" means of egress could lead to an interpretation that the NEC has different requirements than the building code. Note that because "required" is used in the second part of the sentence as welll eliminating it is also better grammer and does not change the real intent. 2 Changing "lighting" to luminaires aligns this with the term used in Article 410. Submitter Full Name: James Degnan Organization: Sparling Submittal Date: Wed Jun 11 19:51:57 EDT 2014 Panel 13 FD Agenda page 170

205 864 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Emergency Illumination. Emergency illumination shall include all required means of egress lighting, illuminated exit signs, and all other lights specified as necessary to provide required illumination.emergency lighting systems shall be designed and installed so that the failure of any individual lighting element, such as the burning out of a lamp, cannot leave in total darkness any space that requires emergency illumination. Where high-intensity discharge lighting such as high- and low-pressure sodium, mercury vapor, and metal halide is used as the sole source of normal illumination, the emergency lighting system shall be required to operate until normal illumination has been restored. Where an emergency system is installed, emergency illumination shall be provided in the area of the disconnecting means required by and , as applicable, where the disconnecting means are installed indoors. Exception: Alternative means that ensure that the emergency lighting illumination level is maintained shall be permitted. The deleted text appears to be a definition of the term Emergency Illumination. Section of the NEC Style Manual would suggest that definitions should not be included in the text of this section but inserted to section I will submit a PI to that section to correlate such action if the CMP agrees. Related Public Inputs for This Document Related Input Public Input No NFPA [New Section after 700.2] Relationship Submitter Full Name: Charles Palmieri Organization: Town of Norwell Submittal Date: Sat Aug 02 08:35:27 EDT 2014 Panel 13 FD Agenda page 171

206 904 of /18/2014 2:46 PM Public Input No. 752-NFPA [ New Section after ] Branch Circuit Emergency Lighting Transfer Switch (BCELTS) Emergency lighting loads fed by branch circuits rated at not greater than 20A shall be permitted to be transferred from the normal branch circuit to an emergency branch circuit using a listed branch circuit emergency lighting transfer switch. The mechanically held requirement of section (C) shall not apply to listed branch circuit emergency lighting transfer switches. Automatic Load Control Relays (ALCR s) have long served as a method of controlling emergency lighting loads during normal operation and then automatically illuminating these loads to full brightness during a utility power interruption. These devices are evaluated in accordance with UL 924, the Standard for Emergency Lighting and Power Equipment. Historically, some ALCRs have been intended specifically as dimmer or switch bypass devices, whereas others have been intended for transferring an emergency lighting load between a normal power source and an emergency power source. In 2011, section (now in the 2014 NEC) was added to the National Electrical Code, covering the requirements of ALCR s. This section specifically states: "The load control relay shall not be used as transfer equipment." While UL 924 transfer-capable ALCR s were never intended for use as general purpose transfer equipment, these devices fall within the NEC definition of transfer equipment because they can be intended for transferring a load between two asynchronous power sources (normal and emergency). However, they do not meet the current requirements of NEC Art. 700 for emergency transfer switches, even though they are sometimes being used in this application. Currently, listed ACLR s with transfer features are being installed in the field in violation of NEC section Most of these devices have undergone no evaluation as emergency transfer switches. The uncertainty as to their ability to perform in a manner comparable to the traditional emergency transfer switches needed to be resolved. In order to resolve the conflict between the 2011 NEC and these existing devices, UL established a task group consisting of UL staff, STP 1008 members, STP 924 members, and manufacturers of these devices, which are now being called Branch Circuit Emergency Lighting Transfer Switches (BCELTS). BCELTS devices (and transfer-capable ALCR s that are re-evaluated as BCELTS s under UL1008) will now be evaluated under comparable performance and construction requirements as those applied to traditional emergency transfer switches when used on branch circuits rated up to 20 amperes. The following is a summary of the BCELTS-related changes to UL1008: 1. Added Branch Circuit Emergency Lighting Transfer Switch (BCELTS) to the scope of UL Constrained the use of the BCELTS to emergency lighting loads on branch circuits rated not over 20 amperes. 3. Modified certain construction requirements of UL 1008 to accommodate the BCELTS, notably the modification of the mechanical hold requirement of a general purpose emergency transfer switch. 4. Added additional testing requirements for the BCELTS in order to provide safety equivalence between a general purpose transfer switch and the BCELTS. This proposal for new section is now needed to harmonize the BCELTS requirements of UL1008 and the NEC. Submitter Full Name: Steven Terry Organization: Electronic Theatre Controls Inc Affilliation: US Institute for Theatre Technology Submittal Date: Tue Jul 01 17:50:45 EDT 2014 Panel 13 FD Agenda page 172

207 905 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Protection of Equipment. The alternate source for emergency systems shall not be required to have provide ground-fault protection of equipment with automatic disconnecting means. Ground-fault indication of at the emergency source shall be provided in accordance with 700.6(D) if ground-fault protection of equipment with automatic disconnecting means is not provided. The current wording of the text implies that the ground fault equipment is installed for the purpose of protecting the source, which is not the case. Generators with protection in compliance to (A) can't be damaged by an external ground fault. In order to accurately sense a ground fault, especially in multiple generator installations, it is likely that the ground fault sensing equipment will not be located at or on the generator set. Consequently, the wording change be made so heroic measures are not needed to mount sensing equipment on the generator. The change makes it more clear that ground fault sensing is required for protection of the distribution system, and annunciation at the source is required, but protection is definitely not for the generator set, nor is it required to be located in the generator set package. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 10:19:29 EDT 2014 Panel 13 FD Agenda page 173

208 906 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See IEEE Recommended Practice for Overcurrent Coordination in Industrial and Commercial Power Systems The overcurrent coordination problem has proven to have many subtleties that should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Wed Nov 05 09:41:41 EST 2014 Panel 13 FD Agenda page 174

209 907 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all emergency system supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Additional Proposed Changes File Name Description Approved DJC_Public_Comment.pdf Example of Emergency System states Emergency system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices. This implies that the overcurrent protective device on the normal side of an automatic transfer switch must also meet the requirements for selective coordination.this is in conflict with the Scope of Article 700, which reads, "The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted" The attached sketch shows in red (solid) the emergency system, as described in the scope, when the normal system, shown in grey (dashed), is interrupted. The normal circuit breaker serving the normal side of an automatic transfer switch, is NOT within the scope of Article 700, therefore is not part of the emergency system, therefore is not required to coordinate with the downstream system. Submitter Full Name: Daniel Caron Organization: Bard, Rao + Athanas Consulting Engineers Submittal Date: Wed Nov 05 15:06:52 EST 2014 Panel 13 FD Agenda page 175

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211 908 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall and transfer equipment shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. by requiring the transfer equipment to be included in the selective coordination study will prevent problems that can occur in the field. Automatic transfer switches have specific withstand closing rating requirements per each manufacture, such as specific breaker, any breaker, fuses, 3 cycle & 30 cycle. This requirement will require the specific automatic transfer switch for the plan review phase of the project and solve any problems before the plans are released and the system is built. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Fri Nov 07 14:14:55 EST 2014 Panel 13 FD Agenda page 176

212 866 of /18/2014 2:46 PM Public Input No. 971-NFPA [ Section No ] Directly Controlled Luminaires. Where emergency illumination is provided by one or more directly controlled luminaires that respond to an external control input to bypass normal control upon loss of normal power, such luminaires and external bypass controls shall be individually listed for use in emergency systems. The title of this new section "Directly Controlled Luminaires" is not a defined term. In the last cycle when this was submitted (ROP ) CMP 13 rejected the proposal. A revision was submitted (ROC 13-8) and accepted but in that process the only way to know what was intended with the new section is to read the 2014 ROP and ROC. Perhaps a definition could be considered such as: Definitions. Directly Controlled Luminaire. Intelligent devices in the emergency control signal chain to be listed for use in emergency systems that through serial communications or analog control sense power loss that switches the luminaire to on. My suggested definition may not accurately describe this luminaire. Please revise or consider an Informational Note that will help users know the intent of this section. Submitter Full Name: David Hittinger Organization: Independent Electrical Contractors of Greater Cincinnati Affilliation: Independent Electrical Contractors Submittal Date: Mon Jul 28 13:56:05 EDT 2014 Panel 13 FD Agenda page 177

213 904 of /18/2014 2:46 PM Public Input No. 752-NFPA [ New Section after ] Branch Circuit Emergency Lighting Transfer Switch (BCELTS) Emergency lighting loads fed by branch circuits rated at not greater than 20A shall be permitted to be transferred from the normal branch circuit to an emergency branch circuit using a listed branch circuit emergency lighting transfer switch. The mechanically held requirement of section (C) shall not apply to listed branch circuit emergency lighting transfer switches. Automatic Load Control Relays (ALCR s) have long served as a method of controlling emergency lighting loads during normal operation and then automatically illuminating these loads to full brightness during a utility power interruption. These devices are evaluated in accordance with UL 924, the Standard for Emergency Lighting and Power Equipment. Historically, some ALCRs have been intended specifically as dimmer or switch bypass devices, whereas others have been intended for transferring an emergency lighting load between a normal power source and an emergency power source. In 2011, section (now in the 2014 NEC) was added to the National Electrical Code, covering the requirements of ALCR s. This section specifically states: "The load control relay shall not be used as transfer equipment." While UL 924 transfer-capable ALCR s were never intended for use as general purpose transfer equipment, these devices fall within the NEC definition of transfer equipment because they can be intended for transferring a load between two asynchronous power sources (normal and emergency). However, they do not meet the current requirements of NEC Art. 700 for emergency transfer switches, even though they are sometimes being used in this application. Currently, listed ACLR s with transfer features are being installed in the field in violation of NEC section Most of these devices have undergone no evaluation as emergency transfer switches. The uncertainty as to their ability to perform in a manner comparable to the traditional emergency transfer switches needed to be resolved. In order to resolve the conflict between the 2011 NEC and these existing devices, UL established a task group consisting of UL staff, STP 1008 members, STP 924 members, and manufacturers of these devices, which are now being called Branch Circuit Emergency Lighting Transfer Switches (BCELTS). BCELTS devices (and transfer-capable ALCR s that are re-evaluated as BCELTS s under UL1008) will now be evaluated under comparable performance and construction requirements as those applied to traditional emergency transfer switches when used on branch circuits rated up to 20 amperes. The following is a summary of the BCELTS-related changes to UL1008: 1. Added Branch Circuit Emergency Lighting Transfer Switch (BCELTS) to the scope of UL Constrained the use of the BCELTS to emergency lighting loads on branch circuits rated not over 20 amperes. 3. Modified certain construction requirements of UL 1008 to accommodate the BCELTS, notably the modification of the mechanical hold requirement of a general purpose emergency transfer switch. 4. Added additional testing requirements for the BCELTS in order to provide safety equivalence between a general purpose transfer switch and the BCELTS. This proposal for new section is now needed to harmonize the BCELTS requirements of UL1008 and the NEC. Submitter Full Name: Steven Terry Organization: Electronic Theatre Controls Inc Affilliation: US Institute for Theatre Technology Submittal Date: Tue Jul 01 17:50:45 EDT 2014 Panel 13 FD Agenda page 178

214 905 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Protection of Equipment. The alternate source for emergency systems shall not be required to have provide ground-fault protection of equipment with automatic disconnecting means. Ground-fault indication of at the emergency source shall be provided in accordance with 700.6(D) if ground-fault protection of equipment with automatic disconnecting means is not provided. The current wording of the text implies that the ground fault equipment is installed for the purpose of protecting the source, which is not the case. Generators with protection in compliance to (A) can't be damaged by an external ground fault. In order to accurately sense a ground fault, especially in multiple generator installations, it is likely that the ground fault sensing equipment will not be located at or on the generator set. Consequently, the wording change be made so heroic measures are not needed to mount sensing equipment on the generator. The change makes it more clear that ground fault sensing is required for protection of the distribution system, and annunciation at the source is required, but protection is definitely not for the generator set, nor is it required to be located in the generator set package. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 10:19:29 EDT 2014 Panel 13 FD Agenda page 179

215 907 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all emergency system supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Additional Proposed Changes File Name Description Approved DJC_Public_Comment.pdf Example of Emergency System states Emergency system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices. This implies that the overcurrent protective device on the normal side of an automatic transfer switch must also meet the requirements for selective coordination.this is in conflict with the Scope of Article 700, which reads, "The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of emergency systems consisting of circuits and equipment intended to supply, distribute, and control electricity for illumination, power, or both, to required facilities when the normal electrical supply or system is interrupted" The attached sketch shows in red (solid) the emergency system, as described in the scope, when the normal system, shown in grey (dashed), is interrupted. The normal circuit breaker serving the normal side of an automatic transfer switch, is NOT within the scope of Article 700, therefore is not part of the emergency system, therefore is not required to coordinate with the downstream system. Submitter Full Name: Daniel Caron Organization: Bard, Rao + Athanas Consulting Engineers Submittal Date: Wed Nov 05 15:06:52 EST 2014 Panel 13 FD Agenda page 180

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217 906 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See IEEE Recommended Practice for Overcurrent Coordination in Industrial and Commercial Power Systems The overcurrent coordination problem has proven to have many subtleties that should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Wed Nov 05 09:41:41 EST 2014 Panel 13 FD Agenda page 181

218 908 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Emergency system(s) overcurrent devices shall and transfer equipment shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. by requiring the transfer equipment to be included in the selective coordination study will prevent problems that can occur in the field. Automatic transfer switches have specific withstand closing rating requirements per each manufacture, such as specific breaker, any breaker, fuses, 3 cycle & 30 cycle. This requirement will require the specific automatic transfer switch for the plan review phase of the project and solve any problems before the plans are released and the system is built. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Fri Nov 07 14:14:55 EST 2014 Panel 13 FD Agenda page 182

219 909 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Scope. The provisions of this article apply to the electrical safety of the installation, operation, and maintenance of legally required standby systems consisting of circuits and equipment intended to supply, distribute, and control electricity to required facilities for illumination or power, or both, when the normal electrical supply or system is interrupted. The systems covered by this article consist only of those that are permanently installed in their entirety, including the power source. Informational Note No. 1: For additional information, see NFPA , Health Care Facilities Code. Informational Note No. 2: For further information regarding performance of emergency and standby power systems, see NFPA , Standard for Emergency and Standby Power Systems. Informational Note No. 3: For further information, see ANSI/IEEE , Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications. This is an editorial change to update 517 references to the recent changes to 2015 NFPA Healthcare Facilities Code to correlate information between the two documents as per the 2011 National Electrical Code Style Manual Section and subsequent sections. Submitter Full Name: Gary Beckstrand Organization: Utah Electrical JATC Submittal Date: Tue Nov 04 15:54:41 EST 2014 Panel 13 FD Agenda page 183

220 910 of /18/2014 2:46 PM Public Input No. 670-NFPA [ New Section after ] Unit Equipment. Equipment that is powered by rechargeable battery and is intended for illumination in the event of normal source power failure. Those who are new to article 701 and unfamiliar with what Unit Equipment is may find a definition to be beneficial. Related Public Inputs for This Document Related Input Public Input No. 669-NFPA [New Section after 700.2] Relationship Basicly these are identical definitions for two different articles. Submitter Full Name: DANIEL MCKINNEY Organization: Submittal Date: Thu Jun 05 15:01:07 EDT 2014 Panel 13 FD Agenda page 184

221 911 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Battery Systems Maintenance. Where batteries are used for control, starting, or ignition of prime movers, the authority having jurisdiction shall require periodic maintenance. Informational Note: The type of maintenance depends upon the battery chemistry and the battery manufacturer s recommended maintenance. Some battery types or configurations may not require or even allow maintenance, other than visual inspection or alarm testing. It may not be feasible for an AHJ to enforce periodic maintenance, the requirements of which can vary from one battery chemistry to another. A new informational note is added to make that point. As battery chemistries other than lead-acid or nickel-cadmium are used in legally-required power systems, the code needs to evolve to consider their maintenance requirements (or the lack thereof). Submitter Full Name: Stephen McCluer Organization: Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Mon Nov 03 19:17:45 EST 2014 Panel 13 FD Agenda page 185

222 867 of /18/2014 2:46 PM Public Input No. 590-NFPA [ Section No ] Capacity and Rating. A legally required standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at one time. Legally required standby system equipment shall be suitable for the maximum available fault current at its terminals. Any additions or modifications to the legally required standby power source shall include engineered calculations and the field testing of the legally required power source. The legally required standby alternate power source shall be permitted to supply both legally required standby and optional standby system loads under either of the following conditions: (1) Where the alternate source has adequate capacity to handle all connected loads (2) Where automatic selective load pickup and load shedding is provided that will ensure adequate power to the legally required standby circuits The requirement of engineering calculations and field testing will ensure that the legally required standby power source will function correctly and as designed. The addition or modification to the legally required standby power source can occur over a period of time with the addition and/or modification of electrical equipment, devices or luminaires. The legally required standby power source may lose some of its capacity over a period of time. Not all jurisdictions have the luxury of electrical plan review, with the inspector being required to make a field call on the spot without any engineering or field testing of the revised legally required standby power source. The engineering calculations shall be permitted to use the demand metering allowed in NEC Submitter Full Name: Harold Willman Organization: Colorado Code Consulting Submittal Date: Thu May 15 18:36:10 EDT 2014 Panel 13 FD Agenda page 186

223 912 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Automatic Transfer Switches. Automatic transfer switches shall be electrically operated and mechanically held. Automatic transfer switches, rated 1000 VAC and below, shall be listed for emergency use. This Public Input was developed by a Task Group assigned by the NEC Correlating Committee to: (1) resolve issues with actions taken by Code-making Panels 1 and 8 on proposals and comments in the 2014 NEC cycle relative to changing the voltage threshold in articles under their purview from 600 volts to 1000 volts, (2) address indoor and outdoor electrical substations, and (3) evaluate other higher voltage threshold requirements to be included relative to present trends. Members of the Task Group on Over 600 volts for this Public Input included: Alan Manche; Donny Cook; Vince Saporita; Lanny Floyd; Paul Barnhart; Eddie Guidry; Alan Peterson; Tom Adams; David Kendall; Dave Mercier; Tim Pope; and co-chairs Roger McDaniel and Neil F. LaBrake, Jr.; including ad-hoc members Larry Cogburn, CMP-8 Chair and Ken Boyce, CMP-1 Chair. The publication of UL 1008A permits the listing of transfer switches over 1000 V for emergency use. Submitter Full Name: Neil LaBrake Organization: National Grid Submittal Date: Fri Oct 03 14:00:19 EDT 2014 Panel 13 FD Agenda page 187

224 913 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Derangement Malfunction. To indicate derangement indicate malfunction of the standby source. The NEC Style Manual states "3.3.4 Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic." The term "derangement" is not commonly used or understood in the industry, it is neither included in the Style Manual's list of standard terms nor does it appear anywhere in the NFPA 110 even thought the reader is directed to that standard for additional information or in UL2200 the product standard for generator sets. Therefore it should be replace with a Malfunction or another more suitable term. Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Sat Nov 01 10:34:07 EDT 2014 Panel 13 FD Agenda page 188

225 914 of /18/2014 2:46 PM Public Input No NFPA [ Section No (D) ] (D) Ground Fault. To indicate a ground fault in solidly grounded wye, legally required standby systems of more than 150 actual volts to ground and circuit-protective devices rated 1000 amperes or more. The sensor for the ground-fault signal devices shall be located at, or ahead of, the main system disconnecting means for the legally required standby source, and the maximum setting of the signal devices shall be for a ground-fault current of 1200 amperes. Instructions on the course of action to be taken in event of indicated ground fault shall be located at or near the sensor location. Informational Note: For signals for generator sets, see NFPA , Standard for Emergency and Standby Power Systems. This section uses a voltage that is an "actual" hard limit. Refer to the substantiation for 1902 for more information. Related Public Inputs for This Document Related Input Relationship Public Input No NFPA [Global Input] This submission depends on 1902 Submitter Full Name: JAMES WILLIAMS Organization: none Affilliation: Retired Master Electrician Submittal Date: Wed Oct 22 10:12:07 EDT 2014 Panel 13 FD Agenda page 189

226 915 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Mandated Standby. A sign shall be placed at the service entrance indicating type and location of each on-site legally required standby power sources. Exception: A sign shall not be required for individual unit equipment as specified in (G). with the increased use standby power sources, multi tenant buildings can have multiple standby power sources at different locations, by specifying each, the sign will be specific for each tenant and standby power sources. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)] Public Input No NFPA [Section No (A)] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Thu Nov 06 18:34:15 EST 2014 Panel 13 FD Agenda page 190

227 916 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] TITLE OF NEW CONTENT section (A) A Grounded Non-separately derived system Type your content here... A non-separately derived generator shall not supply more than one transfer switch under the following conditions (1) A service disconnect and a feeder that is supplied from another set of service entrance conductors. (2) Two or more feeders supplied from different sets of service entrance conductors. (3) Two or more feeders that are individually supplied from a different separately derived source. (4) Two or more feeders with one of the feeders supplying emergency load(s). Additional Proposed Changes File Name Description Approved img004.pdf img005.pdf img006.pdf Parallel path load side connection emergency loads A non-separately derived generator supplying any down stream feeder panels supplied from different main service disconnects will see the neutral to ground connection (main bonding connection) from the main service disconnect of the other main service disconnect creating a parallel path and a violation of 250.6, even folks that understand section do not realize the other service main bonding jumper creates a neutral to ground connection downstream in a feeder panel when supplied from a non-separately derived generator connection. Section (A) (5) address the load side of a main service disconnect neutral to bond connection. This is not a load side connection but one from another main service panel. Connecting the generator non-separately derived will create a parallel path and if one of the panels lost a neutral the other service neutral would be overloaded. This section will not preclude more than two main services panels supplied from a common service from being supplied by a non-separately derived generator This new section will remove this hazard and make it clear this type of installation is not permitted. Submitter Full Name: Alfio Torrisi Organization: master electrician Submittal Date: Wed Oct 29 20:24:08 EDT 2014 Panel 13 FD Agenda page 191

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231 917 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Storage Battery. A storage battery shall be of suitable rating and capacity to supply and maintain at not less than percent of system voltage the maintain the total load of the circuits supplying legally required standby power for a period of at least hours. Batteries, whether of the acid or alkali type, shall be designed and constructed to meet the service requirements of emergency service and shall be compatible with the charger for that particular installation. For a sealed battery, the container shall not be required to be transparent. However, for the lead acid battery that requires water additions, transparent or translucent containers shall be furnished. Automotive-type batteries shall not be used. An automatic battery charging means shall be provided. without the voltage applied to the load falling below the load equipment manufacturer s minimum operating range. Informational Note: Battery systems are described in 480. Battery systems used as a source of emergency power are fully described in NFPA 111. As battery chemistries other than lead-acid or nickel-cadmium begin to be used in emergency power systems, the code needs to evolve to consider them and not be lead-acid or nickel-cadmium specific. Some batteries can drop as low as 50% of nominal voltage with no problems, but the load equipment must determine what an acceptable voltage range would be. An informational note is created to meet the intent of the deleted text by reference to NEC Article 480 and to NFPA 111 (Standard for Stored Electrical Energy Emergency and Standby Power Systems). Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Submittal Date: Tue Oct 28 21:20:39 EDT 2014 Panel 13 FD Agenda page 192

232 918 of /18/2014 2:46 PM Public Input No NFPA [ Section No (G) ] (G) Unit Equipment. Individual unit equipment for legally required standby illumination shall consist of the following: (1) A rechargeable battery (2) A battery charging means (3) Provisions for one or more lamps mounted on the equipment and shall be permitted to have terminals for remote lamps (4) A relaying device arranged to energize the lamps automatically upon failure of the supply to the unit equipment The batteries shall be of suitable rating and capacity to supply and maintain at not less than percent of the nominal battery voltage for the total lamp load associated with the unit at not less than either (a) or (b) for: ( a) a period of at least hours, or the unit equipment shall supply and maintain 11 2 hours without the voltage falling below the lamp equipment manufacturer s minimum operating voltage range; or (b) not less than 60 percent of the initial legally required standby illumination for a period of at least hours. Storage batteries, whether of the acid or alkali type, shall be designed and constructed to meet the requirements of emergency service hours Informational Note: Battery systems are described in 480. Battery systems used as a source of emergency power are fully described in NFPA 111. Unit equipment shall be permanently fixed in place (i.e., not portable) and shall have all wiring to each unit installed in accordance with the requirements of any of the wiring methods in Chapter 3. Flexible cord-and-plug connection shall be permitted, provided that the cord does not exceed 900 mm (3 ft) in length. The branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Legally required standby luminaires that obtain power from a unit equipment and are not part of the unit equipment shall be wired to the unit equipment by one of the wiring methods of Chapter 3. Exception: In a separate and uninterrupted area supplied by a minimum of three normal lighting circuits, a separate branch circuit for unit equipment shall be permitted if it originates from the same panelboard as that of the normal lighting circuits and is provided with a lock-on feature. As battery chemistries other than lead-acid or nickel-cadmium begin to be used in emergency power systems, the code needs to evolve to consider them and not be lead-acid or nickel-cadmium specific. Some batteries can drop as low as 50% of nominal voltage with no problems, but the load equipment must determine what is an acceptable voltage range. The text is rearranged into bullet form in compliance with the manual of style. An informational note is created to meet the intent of the deleted text by reference to NEC Article 480 and NFPA 111 (Standard for Stored Electrical Energy Emergency and to Standby Power Systems). Submitter Full Name: Stephen McCluer Organization: APC by Schneider Electric Affilliation: IEEE Stationary Battery Committee Panel 13 FD Agenda page 193

233 920 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Ground-Fault Protection of Equipment. The alternate source for legally required standby systems shall not be required to have provide ground-fault protection of equipment with automatic disconnecting means. Ground-fault indication of at the legally required standby source shall be provided in accordance with 701.6(D) if ground-fault protection of equipment with automatic disconnecting means is not provided. The current wording of the text implies that the ground fault equipment is installed for the purpose of protecting the source, which is not the case. Further, some authorities interpret the text to require ground fault protection mounted on the generator. Generators with protection in compliance to (A) can't be damaged by an external ground fault, so, clearly the protection is for the equipment connected to the generator. In order to accurately sense a ground fault, especially in multiple generator installations, it is likely that the ground fault sensing equipment will not be located at or on the generator set. Consequently, the wording change be made so heroic measures are not needed to mount sensing equipment on the generator. The change makes it more clear that ground fault sensing is required for protection of distribution system equipment, and annunciation at the source is required, but protection is definitely not for the generator set, nor is it required to be located in the generator set package. Submitter Full Name: Gary Olson Organization: kw Rx, LLC Submittal Date: Fri Oct 03 10:33:54 EDT 2014 Panel 13 FD Agenda page 194

234 921 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Legally required standby system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See IEEE Recommended Practice for Overcurrent Coordination in Industrial and Commercial Power Systems The overcurrent coordination problem has proven to have many subtleties that should be informed by faster-moving engineering considerations available in the new IEEE 3000 series of recommended practices. The IEEE Industrial Applications Society 3000 series of standards are part of a larger project to revise and reorganize the technical content of the 13 existing IEEE Color Books which provided significant engineering information from experienced engineers. While many of the 3000 series standards are still works in progress, and the topical coverage seeking its proper place, it is not too soon for the various NEC committees to evaluate the importance of strengthening the NEC s linkage to electrical engineering thought leadership. More information is available at this link Submitter Full Michael Anthony Name: Organization: University of Michigan IEEE I&CPS Education and Healthcare Facility Electrotechnology Affilliation: Sub-Committee Submittal Date: Wed Nov 05 09:47:35 EST 2014 Panel 13 FD Agenda page 195

235 922 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Selective Coordination. Legally required standby system(s) overcurrent devices shall and transfer equipment shall be selectively coordinated with all supply-side overcurrent protective devices. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. by requiring the transfer equipment to be included in the selective coordination study will prevent problems that can occur in the field. Automatic transfer switches have specific withstand closing rating requirements per each manufacture, such as specific breaker, any breaker, 3 cycle & 30 cycle. This requirement will require the specific automatic transfer switch for the plan review phase of the project and solve any problems before the plans are released and the system is built Related Public Inputs for This Document Related Input Public Input No NFPA [Section No ] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Fri Nov 07 14:40:17 EST 2014 Panel 13 FD Agenda page 196

236 923 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B)(1) ] (1) Manual Transfer Equipment. Where manual transfer equipment is used, an optional standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at one time. The user of the optional standby system shall be permitted to select the load connected to the system. Instructions shall be posted at the point where loads will be selected providing guidance for untrained persons who may be confronted with the necessity to select the loads to be connected. The submitter previously proposed a mandatory requirement similar to 702.4(B)(2), however, CMP 13 rejected it as excessive. Over the fullness of time, and confronted with an actual case at one of his properties, this submitter has come to fully agree with that rejection. However, nothing in that rejection repealed Murphy's Law. At the time of an outage, the least qualified person is likely to be the one confronted with the problem of making load selections. Adding a small directory of circuit priorities would help avoid overloading the generator until qualified assistance could be summoned, or perhaps at least contacted on a mobile telephone. Submitter Full Name: Frederic Hartwell Organization: Hartwell Electrical Services, Inc. Submittal Date: Thu Nov 06 22:09:16 EST 2014 Panel 13 FD Agenda page 197

237 925 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B)(2) ] (2) Automatic Transfer Equipment. Where automatic transfer equipment is used, an optional standby system shall comply with (2)(a) or (2)(b). (a) Full Load. The standby source shall be capable of supplying the full load that is transferred by the calculated load or maximum demand that will be connected by the automatic transfer equipment. (b) Load Management. Where a system is employed that will automatically manage the connected load, the standby source shall have a capacity sufficient to supply the maximum load that will be connected by the load management system. It is my feeling that changing the words full load to calculated load provides consistency with 702.4B. Moreover, adding the words maximum demand provide clafirication to NEC users that it is permissible to refer to Article if sufficient data is available. It seems favorable to reference Article in this section, as using actual demand data to size a generator could prove to be beneficial to code users. Submitter Full Name: Mitch Feininger Organization: North Dakota State Electrical Board Submittal Date: Sun Oct 05 07:50:51 EDT 2014 Panel 13 FD Agenda page 198

238 924 of /18/2014 2:46 PM Public Input No NFPA [ New Section after 702.4(B)(2) ] TITLE OF NEW CONTENT Exception: For dwelling units, the installation of an Optional Standby System utilizing automatic transfer equipment shall have adequate capacity and rating for the load that is intended to be operated at the same time. Substantiation: An optional standby system by definition supplies power to those systems where life safety does not depend on the performance of the system (B) states that the provisions of the Code are necessary for safety. And compliance results in an installation that is essentially free from hazard but not necessarily efficient, convenient, or adequate for good service. Homeowners installing optional back-up power systems simply want to have the ability to supply power to some limited loads for convenience when there is a power outage, and they want flexibility on which loads they want to supply power to, so they install an automatic transfer switch at the service for the entire home. When the owner is home, there could be a substantial load with equipment and appliances that they are utilizing along with appliances and equipment that cycle on and off randomly such as air-conditioners, refrigerators, furnaces, well pumps etc. If there is a power outage and the load is more than the generator is able to supply, the owner can shed load and restart the generator or reset the output breaker on the generator. This would be similar to a manual type transfer switch where the generator could be overloaded also. Typically, when no one is home, the actual load on a dwelling is minimal. There is always the cycling on and off of equipment throughout the day, but the load is still nominal. There was a previous proposal where Generac supplied data supporting the fact that even a very small generator could supply the power required for most homes when needed. The addition of this exception does not eliminate other requirements of this Code for wire size and overcurrent protection of all the conductors on the normal power side or generator side of the transfer switch to ensure a safe installation. It simply allows for homeowners to have flexibility of the loads they may want to provide power to from the generator without increasing the cost for an oversized generator. Submitter Full Dean Wemmer Name: Organization: Regional Building Department Chief Electrical Inspector for Pikes Peak Regional Building Affilliation: Department. Submittal Date: Mon Nov 03 17:45:40 EST 2014 Panel 13 FD Agenda page 199

239 926 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Transfer Equipment. Transfer equipment shall be suitable for the intended use and designed and installed so as to prevent the inadvertent interconnection of normal and alternate sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Article 705. Transfer equipment, located on the load side of branch circuit protection, shall be permitted to contain supplemental overcurrent protection having an interrupting rating sufficient for the available fault current that the generator can deliver. The supplementary overcurrent protection devices shall be part of a listed transfer equipment. Transfer equipment shall be required for all standby systems subject to the provisions of this article and for which an electric utility supply is either the normal or standby source. Exception: Temporary connection C onnection of a portable generator without transfer equipment shall be permitted in accordance with Article 590 for temporary installations during the period of construction, remodeling, maintenance, repair, demolition, emergencies, testing, experiments, developmental work, outages or similar where conditions of maintenance and supervision ensure that only qualified persons service the installation and where the normal supply is physically isolated by a lockable disconnecting means or by disconnection of the normal supply conductors. Temporary wiring shall be removed upon completion of construction or purpose for which the wiring was installed The current exception has been subject to misinterpretation. Installers have attempted to install permanent electrical wiring without a transfer switch to allow for the plug and play (via single-pole separable connectors), short-term, unattended connection of large portable generators at a chain of convenience stores who may lose power during severe weather. This completely negates the basic rule for a permanently installed transfer switch. The inclusion of the word "temporary" at the beginning of the exception infers that a transfer switch is not required if the generator will only be connected for a short period of time. The period of time is not really relevant; the purpose of the exception is to allow for the one-time or very infrequent connection of a portable generator, without the need for a permanently installed transfer switch, when the normal utility supply is not available due to construction, remodeling, repairs, outages and so on, and qualified persons are responsible for and available to attend to the temporary installation. Some wording in the proposed revision has been borrowed from and is consistent with Article 590 for Temporary Installations. NEC Exception came about during the 2005 code cycle: this proposed revision clarifies the intent with the original proposal, comments, substantiations and code-panel statements from the 2005 cycle. Submitter Full Name: JOHN WILLIAMSON Organization: MN DEPT LABOR AND INDUSTRY Submittal Date: Tue Oct 07 14:51:41 EDT 2014 Panel 13 FD Agenda page 200

240 928 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Signals. Audible and visual signal devices shall be provided, where practicable, for the following purposes. ( 1 A ) Derangement Malfunction. To indicate derangement Malfunction of the optional standby source. ( 2 B ) Carrying Load. To indicate that the optional standby source is carrying load. Exception: Signals shall not be required for portable standby power sources. The NEC Style Manual states "3.3.4 Word Clarity. Words and terms used in the NEC shall be specific and clear in meaning, and shall avoid jargon, trade terminology, industry-specific terms, or colloquial language that is difficult to understand. NEC language shall be brief, clear, and emphatic." The term "derangement" is not commonly used or understood in the industry and is not included in the Style Manual's list of standard terms. It also does not appear anywhere in NFPA 110 even thought the reader is directed to that standard for additional information nor in UL2200 the product standard for generator sets. Therefore it should be replace with a Malfunction or another more suitable term. Also, the numbering of the sub articles should follow NEC style requirements to be consistent with the corresponding sub articles in and Submitter Full Name: Brian Brady Organization: Cummins Power Generation Submittal Date: Sun Nov 02 08:43:32 EST 2014 Panel 13 FD Agenda page 201

241 927 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Transfer Equipment. Transfer equipment shall be suitable for the intended use and designed and installed so as to prevent the inadvertent interconnection of normal and alternate sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Article 705. Transfer equipment, located on the load side of branch circuit protection, shall be permitted to contain supplemental overcurrent protection having an interrupting rating sufficient for the available fault current that the generator can deliver. The supplementary overcurrent protection devices shall be part of a listed transfer equipment. Transfer equipment shall be required for all standby systems subject to the provisions of this article and for which an electric utility supply is either the normal or standby source. Transfer equipment rated 1000v nominal or less shall be listed for intende use and controls Exception: Temporary connection of a portable generator rated 1000v nominal or less without transfer equipment shall be permitted where conditions of maintenance and supervision ensure that only qualified persons service the installation and where the normal supply is physically isolated by a lockable disconnecting means or by disconnection of the normal supply conductors. this section needs to corrdinate with 701 and 702 for 1000vac equipment and transfer switch listing Submitter Full Name: JAMES CAIN Organization: [ Not Specified ] Affilliation: self Submittal Date: Thu Nov 06 22:47:56 EST 2014 Panel 13 FD Agenda page 202

242 929 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] NEC Signs Add the following new section to (A) (1) A permanent label shall be placed at equipment connection point(s) indicating phase rotation and color code arrangement for 3-phase systems As an electrical contractor who provided optional power systems for customers during Super Storm Sandy, phase rotation was a challenge; labeling requirements would have reduced rotation errors when power loss occurs saving time money and equipment safety protection thank you for considering As an electrical contractor who provided optional power systems for customers during Super Storm Sandy, phase rotation was a challenge; labeling requirements would have reduced rotation errors when power loss occurs saving time money and equipment safety protection thank you for considering Submitter Full Name: Bob Froehlich Organization: abf CONSULTANTS LLC Submittal Date: Tue Oct 28 20:54:30 EDT 2014 Panel 13 FD Agenda page 203

243 930 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Signs. (A) Standby. A sign shall be placed at the service-entrance equipment that indicates the type and location of on-site optional standby power sources. A sign shall not be required for individual unit equipment for standby illumination. Informational Note: Meter enclosures are by NEC definition not service equipment therefore signs are not required. (B) Grounding. Where removal of a grounding or bonding connection in normal power source equipment interrupts the grounding electrode conductor connection to the alternate power source(s) grounded conductor, a warning sign shall be installed at the normal power source equipment stating: WARNING SHOCK HAZARD EXISTS IF GROUNDING ELECTRODE CONDUCTOR OR BONDING JUMPER CONNECTION IN THIS EQUIPMENT IS REMOVED WHILE ALTERNATE SOURCE(S) IS ENERGIZED. The warning sign(s) or label(s) shall comply with (B). (C) Power Inlet. Where a power inlet is used for a temporary connection to a portable generator, a warning sign shall be placed near the inlet to indicate the type of derived system that the system is capable of based on the wiring of the transfer equipment. The sign shall display one of the following warnings: WARNING: FOR CONNECTION OF A SEPARATELY DERIVED (BONDED NEUTRAL) SYSTEM ONLY or WARNING: FOR CONNECTION OF A NONSEPARATELY DERIVED (FLOATING NEUTRAL) SYSTEM ONLY There is great confusion as to when and where these signs are required. Many inspectors have been requiring signs on meter enclosures even though, by the article 100 definition, meter enclosures are not service equipment. This needs to be spelled out in a clear and concise manner which the additional wording of the new informational note will accomplish. Submitter Full Name: robert meier Organization: NA Submittal Date: Wed Nov 05 17:40:16 EST 2014 Panel 13 FD Agenda page 204

244 931 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Standby. A sign shall be placed at the service-entrance equipment that indicates the type and location of each on-site optional standby power sources. A sign shall not be required for individual unit equipment for standby illumination. with the increased use of standby power sources, multi tenant buildings can have multiple standby power sources at different locations, by specifying each, the sign will be specific for each tenant and standby power sources. Related Public Inputs for This Document Related Input Public Input No NFPA [Section No (A)] Public Input No NFPA [Section No (A)] Relationship Submitter Full Name: Michael Dempsey Organization: Trinity Code Inspections Submittal Date: Thu Nov 06 18:45:50 EST 2014 Panel 13 FD Agenda page 205

245 932 of /18/2014 2:46 PM Public Input No NFPA [ Section No (C) ] (C) Power Inlet Cord or plug connection. Where a power inlet, pin and sleeve device or attachment plug is used for a temporary connection to a portable generator, a warning sign shall be placed near the inlet connector that is permanently installed to indicate the type of derived system that the system is capable of based on the wiring of the transfer equipment. The sign shall display one of the following warnings: WARNING: FOR CONNECTION OF A SEPARATELY DERIVED (BONDED NEUTRAL) SYSTEM ONLY or WARNING: FOR CONNECTION OF A NONSEPARATELY DERIVED (FLOATING NEUTRAL) SYSTEM ONLY Additional Proposed Changes File Name Description Approved 214v2tx.jpg power inlet generator4.jpg Attachment plug powertite_pin_sleeve_plugs_conn_recpt_large.jpg Pin and sleeve tapbox.jpg pin and sleeve this requirement is needed at all types of cord and plug connections Submitter Full Name: Alfio Torrisi Organization: Master electrician Submittal Date: Wed Oct 29 17:02:21 EDT 2014 Panel 13 FD Agenda page 206

246 933 of /18/2014 2:46 PM Public Input No NFPA [ New Section after ] TITLE OF NEW CONTENT (A) A Grounded non-separately system Type your content here... A non-separately derived generator shall not supply more than one transfer switch under the following conditions (1) A service disconnect and a feeder that is supplied from another set of service entrance conductors. (2) Two or more feeders supplied from different sets of service entrance conductors. (3) Two or more feeders that are individually supplied from a separate separately derived source. Additional Proposed Changes File Name Description Approved img004.pdf img005.pdf Parallel path load side connection A non-separately derived generator supplying any down stream feeder panels supplied from different main service disconnects will see the neutral to ground connection (main bonding connection) from the main service disconnect of the other main service disconnect creating a parallel path and a violation of 250.6, even folks that understand section do not realize the other service main bonding jumper creates a neutral to ground connection downstream in a feeder panel when supplied from a non-separately derived generator connection. Section (A) (5) address the load side of a main service disconnect neutral to bond connection. This is not a load side connection but one from another main service panel. Connecting the generator non-separately derived will create a parallel path and if one of the panels lost a neutral the other service neutral would be overloaded. This section will not preclude more than two main services panels supplied from a common service from being supplied by a non-separately derived generator This new section will make it clear this type of installation is not permitted. Submitter Full Name: Alfio Torrisi Organization: Master Electrician Submittal Date: Wed Oct 29 20:04:34 EDT 2014 Panel 13 FD Agenda page 207

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249 934 of /18/2014 2:46 PM Public Input No NFPA [ Section No (B) ] (B) Nonseparately Derived System. Where a portable optional standby source is used as a nonseparately derived system, the equipment grounding bonding conductor shall be bonded to the system grounding electrode. The term equipment grounding conductor is a misnomer even though it has been in use for many many years. Although it is a grounded conductor in normal practice for grounded systems, the idea that grounding makes a system safe, or safer, is inherently false. Connecting a conductor from metallic equipment likely to become energized to the earth does not reduce the shock potential during a fault but, rather, enhances it. The shock potential is basically the voltage drop along the conductor (equipment grounding conductor) due to fault current flowing back to the source. The shock hazard depends upon the time until the fault is cleared by an overcurrent device or some other event. The sizing requirement in results in fault voltages greater than 80% of the supply voltage except for 30 ampere and smaller circuits. Fortunately, in many cases, there are alternate paths for fault current to flow so that the return path impedance may be less than the supply conductor impedance and the resultant fault voltage may be less than one-half of the supply voltage. Even at this lower fault voltage, a shock potential and hazard will exist. This conductor (equipment grounding conductor) is intended to protect the equipment and personnel during a fault by providing a low impedance path to the source with a resultant high fault current that will operate an overcurrent device rapidly. This conductor provides a basic protective function rather than the misleading grounding function. The use of the term protective conductor would better describe the function of this important conductor instead of the misleading term equipment grounding conductor. Making this change would also bring the NEC in conformity with the IEC which uses the abbreviation PE for the protective conductor. Code Panel 5 members have often stated that those in the industry understand what the purpose of the equipment grounding conductor is for. The Panel members understand and probably most of the inspectors and electricians do also. There are, however, enough people doing electrical work without a correct knowledge and they constitute a clear and present danger to the public. This is apparent from the large number of questions that are asked at Inspectors meetings, grounding classes, and as documented recently in the August/September 2014 issue of the NFPA Digest. Changing the terminology will not confuse those that understand but will serve to make the uninformed aware that there is more to electrical safety than merely grounding everything. Submitter Full Name: ELLIOT RAPPAPORT Organization: ELECTRO TECHNOLOGY Submittal Date: Thu Nov 06 20:45:03 EST 2014 Panel 13 FD Agenda page 208

250 935 of /18/2014 2:46 PM Public Input No NFPA [ Section No ] Outdoor Generator Sets. (A) Permanently Installed Generators and Portable Generators Greater Than 15 kw. Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with , and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of (B) Portable Generators 15 kw or Less. Where a portable generator, rated 15 kw or less, is installed using a flanged inlet or other cord- and plug-type connection, a disconnecting means shall not be required where ungrounded conductors serve or pass through a building or structure. Section has no KW rating limitations on cord and plug connected portable generators, eliminating the 15 KW rating would now allow all portable generators to modify the building disconnect location to the generator location, currently only the 15 KW or more portable generators have this allowance. The 15 KW or less portable generator section ( (B)) should be eliminated because it does not allow for a modification of the building disconnect like the 15 KW or more. Because the cord and plug connection is allowed for all portable generators, the inlet outlet is a type of cord and plug connection and need not be singled out. You could install a 15 KW rated portable generator with a cord and plug connection and relocate the building disconnect and not a 14 KW rated portable generator. A, 14 KW or less portable generator vs a 15 KW rating poses less of a hazard and should be allowed. Submitter Full Name: Alfio Torrisi Organization: Master electrician Submittal Date: Wed Oct 29 16:32:42 EDT 2014 Panel 13 FD Agenda page 209

251 938 of /18/2014 2:46 PM Public Input No NFPA [ New Section after (A) ] (2) Outdoor Generator Installation. Generator sets located outdoors shall be mounted in a weather resistant housing and shall be located at least 1.5m (5 ft) from structures having combustible walls per NFPA 37, section A lesser distance is permitted, if the weatherproof enclosure has been tested to demonstrate that a fire within the enclosure will not ignite combustible materials outside the enclosure. The lesser distance location is to be installed in accordance with the manufacturer's instructions. Listing and labeling is required as evidence of this testing. The problem is that the NEC sections relating to generators (articles 445, 700, 701 and 702) does not define the installation of an engine generator at all. Permanently installed engine generators burn a gaseous fuel creating heat and electricity. If there is a fire inside the generator enclosure it is imperative that the fire be contained in the enclosure when the placement of the unit is less than 5 feet from a combustible wall. This is per NFPA 37, section When the placement of the generator is less than 5 feet from a combustible wall it must be demonstrated that a fire inside the unit is contained in the enclosure. If this can be demonstrated, then the fire will not spread to the adjacent combustible wall. It is critical that this fire testing be performed in a lab situation which facilitates proper monitoring, evaluation and documentation of the test. The lab setting allows for a full scale mock-up of a combustible structure, normal operating conditions of the generator, complete with simulated load, and multiple temperature measurements. The documentation allows for future evaluation of similar generators and building materials that may not be commonly available at the time of the testing. Working with a lab that provides a listing and labeling service provides a certified test report and follow up service inspections to ensure the integrity and validity of the test and the product now and in the future. Submitter Full Name: JEFF JONAS Organization: GENERAC POWER SYSTEMS Affilliation: Generac Power Systems, Inc. Submittal Date: Fri Nov 07 08:31:01 EST 2014 Panel 13 FD Agenda page 210

252 939 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Permanently Installed Generators and Portable Generators Greater Than 15 kw and Permanently Installed Generators. Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with , and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of revising the text makes it clear the 15 KW rating only applies to the Portable generator. If interpreted as to include the permanent generator in the 15 KW rating, you no longer can relocate the building disconnect to a permanent generator 15 KW or less. Submitter Full Name: Alfio Torrisi Organization: Master electrician Submittal Date: Tue Nov 04 12:17:41 EST 2014 Panel 13 FD Agenda page 211

253 940 of /18/2014 2:46 PM Public Input No NFPA [ Section No (A) ] (A) Permanently Installed Generators and Portable Generators Greater Than 15 kw. (1) Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with , and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of There is not a problem that this proposal will address. There is no change to the code language as presented. The change described here is required to reformat this section to allow an additional clause to be added to (A). By making the existing text (A)(1) a new clause can be added to (A). Submitter Full Name: JEFF JONAS Organization: GENERAC POWER SYSTEMS Affilliation: Generac Power Systems, Inc. Submittal Date: Fri Nov 07 08:13:36 EST 2014 Panel 13 FD Agenda page 212

254 936 of /18/2014 2:46 PM Public Input No NFPA [ New Section after (A) ] (1) Inlets Power inlets, rated 100Amps or greater, used for the connection of a portable generator set shall be equipped with an interlocked disconnecting means at the point of connection to prevent disconnection under load. Exception 1: If the inlet device is rated as a disconnect Exception 2: Supervised industrial installations where permanent space is identified for the portable generator located within line of site of the power inlets shall not be required to have interlocked disconnecting means nor inlets rated as disconnects. This public input is a companion input to a similar change suggested for Article 445 as an alternative in case the technical committee wishes to limit the requirement to 702 systems only. Code Making Panel 13 during the NEC 2014 Cycle directed this submitter as follows: CMP 13 rejects this comment since this may impact equipment not originally considered in the proposal. The submitter is encouraged to develop proposals in the next NEC cycle to incorporate this concept for the connection of portable generators to premises without regard to the type of system. Furthermore, any proposed text should address all levels of ampacity and types of equipment that may be impacted. This proposal is designed to address the request of the panel. The supervised industrials text was added to address the issue raised in the 2014 cycle when a technical panel member showed a picture of an industrial installation where the inlets were adjacent to a designated area for the portable generator which was not intended to be covered by this submitter. As stated in previous proposals during the NEC 2014 cycle, a portable generator can be out of line of site from the point at which it electrically connects through a permanently installed inlet. If a person cannot visibly see the generator to which it is connected, disconnecting under load can present a safety hazard if the inlet is not rated for load break. The intent of the proposal is to either require: a. Inlets to be load break rated (There are inlet load-break solutions on the market for applications above 100 Amps. This proposal will help ensure the solution is a safe one for portable generators.) or b. Require the power inlet be interlocked via a disconnect to ensure that the disconnect is opened prior to disconnecting. This would prevent someone from disconnecting a non-load break device under load. The proposal acknowledges the fact that devices up to 60 amps can be rated as a disconnecting means. There are also solutions on the market that advertise load-break capabilities above 100Amps. This proposal aims to ensure the right solution is provided for the application. Related Public Inputs for This Document Related Input Public Input No NFPA [New Article after 445] Relationship Submitter Full Name: Thomas Domitrovich Organization: Eaton Corporation Affilliation: Eaton Corporation Panel 13 FD Agenda page 213

255 8 of /18/2014 2:46 PM Public Input No NFPA [ Global Input ] This PI proposes a new Article 706 covering Energy Storage Systems (ESS). Two versions of this new article are being submitted by the NEC DC Task Group. One with this PI and the other with a companion PI. Each is identified with a unique date. Each version is provided as a clean copy and one with track changes containing notes from the task group discussions for the benefit of the panel. Each version is provided with its own substantiation. This PI covers the version. A file containing the task group members is provided. The four files provided with this PI are identified as follows. 1. NEC article 706 on ESS Final_Clean copy_ NEC article 706 on ESS Final w_track changes_ Substantiation for Article 706 Final_ NEC DC Task Group Members Type your content here... Additional Proposed Changes File Name NEC_article_706_on_ESS_Final_Clean_copy_ docx NEC_article_706_on_ESS_Final_w_track_changes_ docx Substantiation_for_Article_706_Final_ docx Contact_List_-_NEC_DC_TG.pdf Description Approved This Public Input was developed by the DC Task Group of the NEC Technical Correlating Committee. The DC Task Group is chaired by John R. Kovacik, UL LLC. The Article 706 subcommittee of the task group was chaired by David Conover of PNNL. The participants in the Task Group and their employers/associations are listed in a separate file provided with this PI. It is difficult to prepare a complex NEC Article like this, combining input from many different sources and other working groups (including the IEEE battery group, and the Article 690 task group), and other organizations such as NEMA and many companies, including manufacturers of equipment covered by this new article. The Task Group for this work had 79 members. We are submitting two versions of the proposed new article: 1. A version dated October 30 with background information and comments included. 2. A version dated November 4. This is a reformat and a modification of version 1. The reason for the two versions is that we had insufficient time to complete the task of creating the final Article, and fully cross-checking all input with final text. We understand that this work will likely continue under a CMP13 task group, appointed by the CMP chair. By providing both documents, we show both the ultimate intended form of the article (version dated November 4), and the full list of content that was researched and proposed (version dated October 30). Please refer to the file provided with this PI which contains the complete substantiation. Related Public Inputs for This Document Related Input Public Input No NFPA [Global Input] Relationship Other version of new Article 706 submitted by the NEC DC Task Group Panel 13 FD Agenda page 214

256 ARTICLE 706 Energy Storage Systems I. General Scope. This article applies to all permanently installed energy storage systems (ESS) which may be stand-alone or interactive with other electric power production sources. Informational Note No. 1. Operating voltages and power ratings for self-contained energy storage systems are typically found on the equipment nameplate data. Informational Note No 2: The following standards are frequently referenced for the installation of energy storage systems: (1) IEEE , Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary Applications (2) IEEE , Recommended Practice for Sizing Vented Lead-Acid Storage Batteries for Stationary Applications. (3) IEEE , Recommended Practice for Installation and Maintenance of Nickel- Cadmium Batteries for Photovoltaic (PV) Systems (4) IEEE , Recommended Practice for Installation Design, and Installation of Valve- Regulated Lead-Acid Batteries for Stationary Applications (5) IEEE (Rev. 2003), IEEE Guide for the Protection of Stationary Battery Systems (6) IEEE , Recommended Practice for Stationary Battery Spill Containment and Management (7) IEEE 1635/ASHRAE , Guide for the Ventilation and Thermal Management of Stationary Battery Installations (8) UL 1973, Batteries for Use in Light Electric Rail (LER) Applications and Stationary Applications (9) UL Subject 2436, Spill Containment For Stationary Lead Acid Battery Systems (10) UL 1989, Standby Batteries (11) UL 810A, Electrochemical Capacitors (12) UL Subject 9540, Safety of Energy Storage Systems and Equipment Definitions Battery. Two or more cells connected together electrically in series, in parallel, or a combination of both to provide the required operating voltage and current levels. Battery Terminal. That part of a cell, container, or battery to which an external connection is made (commonly identified as post, pillar, pole, or terminal post). Cell. The basic electrochemical unit, characterized by a negative electrode (anode) and a positive electrode (cathode), used to receive, store, and deliver electrical energy. Container. A vessel that holds the plates, electrolyte, and other elements of a single unit, comprised of one or more cells, in a battery. It can be referred to as a jar or case. Panel 13 FD Agenda page 215

257 Diversion Charge Controller. Equipment that regulates the charging process of an ESS by diverting power from energy storage to direct-current or alternating-current loads or to an interconnected utility service. Electrochemical Battery. A battery comprised of one or more rechargeable cells of the lead-acid, nickelcadmium, or other rechargeable electrochemical types. Electrolyte. The medium that provides the ion transport mechanism between the positive and negative electrodes of a cell. Energy Storage System (ESS). A device or more than one device assembled together capable of storing energy for use at a future time. ESS(s) include but are not limited to electrochemical storage devices (batteries), flowing electrolyte batteries, capacitors, and kinetic energy devices (flywheels and compressed air). These systems can have ac or dc output for utilization and can include inverters and converters to change stored energy into electrical energy. Energy Storage System, Self-contained. Energy storage systems where the energy storage devices such as cells, batteries or modules and any necessary controls, ventilation, illumination, fire suppression or alarm systems are assembled, installed and packaged into a singular energy storage container or unit. Informational Note: Self-contained systems will generally be manufactured by a single entity, tested and listed to safety standards relevant to the system and readily connected on site to the electrical system and in the case of multiple systems to each other Energy Storage System, Pre-engineered of Matched Components. Energy storage systems that are not self-contained systems but instead are provided as separate components of a system by a singular entity that are matched and intended to be assembled as an energy storage system at the system installation site. Informational Note: Pre-engineered systems of matched components for field assembly as a system will generally be designed by a single entity and comprised of components that are tested and listed separately or as an assembly to safety standards relevant to the component and readily assembled on site as a system and connected on site to the electrical system. Energy Storage System, Other. Energy storage systems that are not self-contained or pre-engineered systems of matched components but instead are composed of individual components assembled as a system. Informational Note: Other systems will generally be comprised of different components combined on site to create an ESS. Those components would generally be tested and listed to safety standards relevant to the application. Flowing Electrolyte Battery. An energy storage device similar to a fuel cell that stores its active materials in the form of two aqueous electrolytes external to the reactor interface. When in use the electrolytes are pumped between reactor and storage tanks. Informational Note: Two commercially available flow battery technologies are zinc bromine and vanadium redox, sometimes referred to as pumped electrolyte ESS. Panel 13 FD Agenda page 216

258 Intercell Connector. An electrically conductive bar or cable used to connect adjacent cells in a battery. Intertier Connector. In an electrochemical battery system, an electrical conductor used to connect two cells on different tiers of the same rack or different shelves of the same rack. Inverter Input Circuit. Conductors between the inverter and the ESS in stand-alone and multimode inverter systems. Inverter Output Circuit. Conductors between the inverter and another electric power production source, such as a utility for electrical production and distribution network. Inverter Utilization Output Circuit. Conductors between the multimode or standalone inverter and utilization equipment. Nominal Voltage (Battery or Cell). The value assigned to a cell or battery of a given voltage class for the purpose of convenient designation. The operating voltage of the cell or battery may vary above or below this value. Informational Note: The most common nominal cell voltages are 2 volts per cell for the lead-acid systems, 1.2 volts per cell for alkali systems, and 3.6 to 3.8 volts per cell for Li-ion systems. Nominal voltages can vary with different chemistries. Sealed Cell or Battery. A cell or battery that has no provision for the routine addition of water or electrolyte or for external measurement of electrolyte specific gravity. Informational Note: Some cells that are considered to be sealed under conditions of normal use, such as valve-regulated lead-acid or some lithium cells, contain pressure relief valves Other Articles. Wherever the requirements of other articles of this Code and Article 706 differ, the requirements of Article 706 shall apply. If the ESS is capable of being operated in parallel with a primary source(s) of electricity, the requirements in , , and shall apply System Classification. ESS shall be classified as one of the types described in (A), (B) or (C). (A) Self-contained ESS. (B) Pre-engineered of matched components ESS intended for field assembly as a system. (C) Other ESS Equipment. Monitors and controls, switches and breakers, power conversion systems, inverters and transformers, energy storage devices and other components of the energy storage system shall be listed for the intended application as a part of an energy storage system. Alternatively, prepackaged self-contained systems shall be permitted to be listed for the intended application as a complete energy storage system. Only inverters listed and identified as interactive shall be permitted on interactive systems Multiple Systems. Multiple ESS(s) shall be permitted to be installed in or on a single building or structure. Panel 13 FD Agenda page 217

259 706.7 Disconnecting Means (A) ESS Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from an ESS. A disconnecting means shall be readily accessible and located within sight of the ESS. Informational Note: See (H) for information on the location of the overcurrent device for conductors (B) Remote Actuation. Where controls to activate the disconnecting means of an ESS are not located within sight of the system, the disconnecting means shall be capable of being locked in the open position, in accordance with , and the location of the controls shall be field marked on the disconnecting means. (C) Busway. Where a DC busway system is installed, the disconnecting means shall be permitted to be incorporated into the busway. (D) Notification. The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the ESS if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: (1) Nominal ESS voltage (2) Maximum available short-circuit current derived from the ESS (3) Arc flash derived from the terminals of the ESS (4) Date the calculation was performed Informational Note: Battery equipment suppliers can provide information about shortcircuit current on any particular battery model. NFPA 70E provides guidance for notification of arc flash hazard due to the prospective short circuit current and/or appropriate personal protective equipment (PPE). (E) Partitions and Distance. Where energy storage device input and output terminals are more than 1.5 m (5 ft) from connected equipment, or where the circuits from these terminals pass through a wall or partition, the installation shall comply with the following: (1) A disconnecting means and overcurrent protection shall be provided at the energy storage device end of the circuit. Fused disconnecting means or circuit breakers shall be permitted to be used. (2) Where fused disconnecting means are used, the line terminals of the disconnecting means shall be connected toward the energy storage device terminals. (3) Overcurrent devices or disconnecting means shall not be installed in energy storage device enclosures where explosive atmospheres can exist. (4) A second disconnecting means located at the connected equipment shall be installed where the disconnecting means required by 706.7(E)(1) is not within sight of the connected equipment. (5) Where the energy storage device disconnecting means is not within sight of the ESS disconnecting means, placards or directories shall be installed at the locations of all disconnecting means indicating the location of all disconnecting means. Panel 13 FD Agenda page 218

260 706.8 Connection to other energy sources. Connection to other energy sources shall comply with the requirements of (A) Load Disconnect. A load disconnect that has multiple sources of power shall disconnect all energy sources when in the off position. (B) Identified Interactive Equipment. Only inverters and ac modules listed and identified as interactive shall be permitted on interactive systems. (C) Loss of Interactive System Power. An inverter in an interactive energy storage system shall automatically de-energize its output to the connected electrical production and distribution network upon loss of voltage in that system and shall remain in that state until the electrical production and distribution network voltage has been restored. A normally interactive energy storage system shall be permitted to operate as a stand-alone system to supply loads that have been disconnected from electrical production and distribution network sources. (D) Unbalanced Interconnections. Unbalanced connections between an energy storage system and electric power production sources shall be in accordance with (E) Point of Connection. The point of connection between an energy storage system and electric power production sources shall be in accordance with Energy Storage System Locations Battery locations shall conform to (A), (B), and (C). (A) Ventilation. Provisions appropriate to the energy storage technology shall be made for sufficient diffusion and ventilation of any possible gases from the storage device, if present, to prevent the accumulation of an explosive mixture. Pre-engineered or self-contained ESS shall be permitted to provide ventilation in accordance with the manufacturer s recommendations and listing for the system. Informational Note No. 1: See NFPA 1, Fire Code, Chapter 52, for ventilation considerations for specific battery chemistries. Informational Note No. 2: Some storage technologies do not require ventilation. Informational Note No. 3: A source for design of ventilation of battery systems is IEEE Std /ASHRAE Guideline (B) Guarding of live parts. Guarding of live parts shall comply with (C) Spaces About ESS Components. Spaces about the ESS shall comply with Working space shall be measured from the edge of the ESS modules, battery cabinets, racks, or trays. For battery racks, there shall be a minimum clearance of 25 mm (1 in.) between a cell container and any wall or structure on the side not requiring access for maintenance. ESS modules, battery cabinets, racks or Panel 13 FD Agenda page 219

261 trays shall be permitted to contact adjacent walls or structures, provided that the battery shelf has a free air space for not less than 90 percent of its length. Pre-engineered and self-contained ESS shall be permitted to have working space between components within the system in accordance with the manufacturer s recommendations and listing of the system. Informational Note: Additional space is often needed to accommodate ESS equipment hoisting equipment, tray removal, or spill containment. (D) Egress. A personnel door(s) intended for entrance to, and egress from, rooms designated as ESS rooms shall open in the direction of egress and shall be equipped with listed panic hardware. (E) Illumination. Illumination shall be provided for working spaces associated with ESS and their equipment and components. Lighting outlets shall not be controlled by automatic means only. Additional lighting outlets shall not be required where the work space is illuminated by an adjacent light source. The location of luminaires shall not: 1. Expose personnel to energized system components while performing maintenance on the luminaires in the system space; or 2. Create a hazard to the system or system components upon failure of the luminaire Directory ESS shall be indicated by (A) and (B). The markings or labels shall be in accordance with (B). (A) Directory. A permanent plaque or directory, denoting all electric power sources on or in the premises, shall be installed at each service equipment location and at locations of all electric power production sources capable of being interconnected. Exception: Installations with large numbers of power production sources shall be permitted to be designated by groups (B) Facilities with Stand-Alone Systems. Any structure or building with an ESS that is not connected to a utility service source and is a stand-alone system shall have a permanent plaque or directory installed on the exterior of the building or structure at a readily visible location acceptable to the authority having jurisdiction. The plaque or directory shall indicate the location of system disconnecting means and that the structure contains a stand-alone electrical power system. II Circuit Requirements Circuit sizing and current. (A) The maximum current for the specific circuit shall be calculated in accordance with (A)(1) through (5). (1) Nameplate Rated Circuit Current. The nameplate(s) rated circuit current shall be the rated current indicated on the ESS nameplate(s), or system listing for pre-engineered or self-contained systems of matched components intended for field assembly as a system. (2) Inverter Output Circuit Current. The maximum current shall be the inverter continuous output current rating. (3) Inverter Input Circuit Current. The maximum current shall be the continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. Panel 13 FD Agenda page 220

262 (4) Inverter Utilization Output Circuit Current. The maximum current shall be the continuous inverter output current rating when the inverter is producing rated power at the lowest input voltage. (5) DC to DC Converter Output Current. The maximum current shall be the dc-to-dc converter continuous output current rating. (B) Conductor Ampacity and Overcurrent Device Ratings. The ampacity of the feeder circuit conductors from the ESS(s) to the wiring system serving the loads to be serviced by the system shall not be less than the greater of the (1) nameplate(s) rated circuit current as determined in accordance with (A) or (2) the rating of the ESS(s) overcurrent protective device(s). (C) Ampacity of Grounded or Neutral Conductor. If the output of a single-phase, 2-wire ESS output(s) is connected to the grounded or neutral conductor and a single ungrounded conductor of a 3-wire system or of a 3-phase, 4-wire, wye-connected system, the maximum unbalanced neutral load current plus the ESS(s) output rating shall not exceed the ampacity of the grounded or neutral conductor Overcurrent protection. (A) Circuits and Equipment. Energy storage circuit conductors and equipment shall be protected in accordance with the requirements of Article 240. Protection devices for ESS circuits shall be in accordance with the requirements of (B) through (F). Circuits shall be protected at the source from overcurrent. (B) Overcurrent Device Ampere Ratings. Overcurrent protective devices, where required, shall be rated in accordance with Article 240 and the rating provided on systems serving the ESS, and shall be not less than 125 percent of the maximum currents calculated in (A). (C) Direct Current Rating. Overcurrent devices, either fuses or circuit breakers, used in any dc portion of an ESS shall be listed and shall have the appropriate voltage, current and interrupt ratings. (D) Prime Movers. Overcurrent protection shall not be required for conductors from an ESS with a nominal voltage of 50 volts or less if these conductors provide power for starting, ignition, or control of prime movers. Section shall not apply to these conductors. (E) Current limiting. A listed, current-limiting, overcurrent device shall be installed in each circuit adjacent to the ESS where the available short-circuit current from an energy storage device exceeds the interrupting or withstand ratings of other equipment in the circuit. (F) Fuses. Means shall be provided to disconnect any fuses associated with ESS equipment and components when the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply Wiring from and equipment supplied by energy storage systems. Wiring and equipment supplied from ESS(s) and system components shall be subject to the applicable provisions of this Code applying to wiring and equipment operating at the same voltage, unless otherwise permitted by this Article. Panel 13 FD Agenda page 221

263 Charge Control (A) General. Provisions shall be provided to control the charging process of the ESS. All adjustable means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain types of energy storage equipment such as valve-regulated lead acid or nickel cadmium can experience thermal failure when overcharged (B) Diversion charge controller. (1) Sole Means of Regulating Charging. An ESS employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging of the storage device. (2) Circuits with Diversion Charge Controller and Diversion Load. Circuits containing a diversion charge controller and a diversion load shall comply with the following: (a) The current rating of the diversion load shall be less than or equal to the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum ESS voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the charging source. (a) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utility-interactive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (a) and (b): (a) These systems shall not be required to comply with (B)(2). (b) These systems shall have a second, independent means of controlling the ESS charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (C) Charge controllers and DC converters. When charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed the ampacity of the conductors in output circuits shall be based on the maximum rated continuous output current of the charge controller or converter for the selected output voltage range, and the voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range. III Electrochemical Energy Storage Systems Part III of this article applies to ESS(s) that are comprised of sealed and non-sealed cells or batteries or system modules that are comprised of multiple sealed cells or batteries Installation of batteries. Storage batteries associated with an ESS shall be installed in accordance with the provisions this Article. (A) Dwelling Units. (1) Operating voltage. ESS(s) for dwellings shall be configured so as to operate at a voltage of 100 volts, or less. Exception: Where live parts are not accessible during routine ESS maintenance, an ESS voltage greater than 100 volts shall be permitted. Panel 13 FD Agenda page 222

264 (2) Guarding of live parts. Live parts of ESS(s) for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or chemistry. (B) Storage system nonconductive cases and conductive racks. Flooded, vented lead-acid batteries where operating at more than 100 volts shall not use conductive cases or shall not be installed in conductive cases. Conductive racks used to support non-conductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the non-conductive cases. Exception: This requirement shall not apply to any type of valve-regulated lead-acid (VRLA) battery or other types of sealed batteries that may require steel cases for proper operation. (C) Disconnection of Series Battery Circuits. Battery circuits subject to field servicing, where operating at more than 100 volts shall have provisions to disconnect the series-connected strings into segments of 100 volts or less for maintenance by qualified persons. Non load-break bolted or plugin disconnects shall be permitted. (D) Storage system maintenance disconnecting means. ESS greater than 100 volts shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the electrical storage system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) for the remainder of any other electrical system. A non-load-break-rated switch shall be permitted to be used as a disconnecting means. (E) Storage systems of more than 100 volts. On electrochemical ESS operating at more than 100 volts the system shall be permitted to operate with ungrounded conductors, provided a ground-fault detector and indicator is installed to monitor for ground faults within the storage system Battery and cell terminations. (A) Corrosion Prevention. Antioxidant material suitable for the battery connection shall be used when recommended by the battery or cell manufacturer. Informational Note: The battery manufacturer s installation and instruction manual can be used for guidance for acceptable materials. (B) Intercell and Intertier Conductors and Connections. The ampacity of field-assembled intercell and intertier connectors and conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient temperature shall not exceed the safe operating temperature of the conductor insulation or of the material of the conductor supports. Informational Note: Conductors sized to prevent a voltage drop exceeding 3 percent of maximum anticipated load, and where the maximum total voltage drop to the furthest point of connection does not exceed 5 percent, may not be appropriate for all battery applications. IEEE , Guide for the Protection of Stationary Battery Systems, provides guidance for overcurrent protection and associated cable sizing. (C) Battery Terminals. Electrical connections to the battery, and the cable(s) between cells on separate levels or racks, shall not put mechanical strain on the battery terminals. Terminal plates shall be used where practicable Battery interconnections. Flexible cables, as identified in Article 400, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box Panel 13 FD Agenda page 223

265 where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed and identified as moisture resistant. Flexible, fine-stranded cables shall only be used with terminals, lugs, devices, or connectors in accordance with Accessibility. The terminals of all cells or multi-cell units shall be readily accessible for readings, inspection, and cleaning where required by the equipment design. One side of transparent battery containers shall be readily accessible for inspection of the internal components Battery Locations. Electrochemical Battery locations shall conform to (A), (B) and (C). A. Live Parts. Guarding of live parts shall comply with B. Top Terminal Batteries. Where top terminal electrochemical energy storage devices are installed on tiered racks or on shelves of battery cabinets, working space in accordance with the storage equipment manufacturer s instructions shall be provided between the highest point on a storage system component and the row, shelf or ceiling above that point. Informational Note No. 1: The installation instructions of the system component manufacturer typically define how much top working space is necessary for a particular system component. Informational note No. 2: IEEE 1187, provides guidance for top clearance of VRLA batteries, which are the most commonly used battery in cabinets. C. Gas piping. Gas piping shall not be permitted in dedicated battery rooms or spaces dedicated to electrochemical ESS Vents. (A) Vented Cells. Each vented cell shall be equipped with a flame arrester. Informational Note: A flame arrested is designed to prevent destruction of the cell due to ignition of gases within the cell by an external spark or flame under normal operating conditions. (B) Sealed Cells. Sealed battery or cells shall be permitted to be equipped with a pressure-release vent to prevent excessive accumulation of gas pressure. IV Flowing Electrolyte Energy Storage Systems The provisions Part IV apply to ESS(s) composed of or containing flowing electrolyte batteries General. All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of Article 692. The system and system components shall also meet the provisions of parts I and II of this article. Unless otherwise directed by this article, flowing electrolyte ESS shall comply with the applicable provisions of Article Electrolyte Classification. The flowing electrolyte(s) that are acceptable for use in the batteries associated with the ESS shall be identified by name and chemical composition. Such identification shall be provided by readily discernable signage adjacent to every location in the system where the electrolyte can be put into or taken out of the system. Panel 13 FD Agenda page 224

266 Electrolyte Containment. Flowing electrolyte battery systems shall be provided with a means for electrolyte containment to prevent spills of electrolyte from the system. An alarm system is to be provided to signal an electrolyte leaks from the system. Electrical wiring and connections shall be located and routed in a manner that mitigates the potential for exposure to electrolytes Flow controls. Controls shall be provided to safely shut down the system in the event of electrolyte blockage such as a malfunctioning electrolyte pump or valve. [LBF suggested text] Pumps and other fluid handling equipment. Pumps and other fluid handling equipment are to be rated/specified suitable for exposure to the electrolytes. V Kinetic Energy Storage Systems The provisions of Part V apply to ESS(s) composed of or containing kinetic devices intended to store energy mechanically and when there is a demand for electrical power to use the stored energy to generate the needed power General. All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of this code. Unless otherwise directed by this article, kinetic ESS shall comply with the applicable provisions of Part III of Article 705. Informational Note: The energy storage device itself can be considered similar to a generator as covered in Article 445, with respect to the inputs to and outputs from the system. Panel 13 FD Agenda page 225

267 Substantiation to accompany the final Article 706 submittal dated Note 1: This document applies to the clean copy of the draft article. Note 2: Commentary is not provided on all clauses. This public input was developed by the NEC DC Task Force (TF) of the Technical Correlating Committee. The Task Force is chaired by John R. Kovacik, UL LLC. The participants in the task force and their employers/associations are listed in a separate document which is on file with NFPA. Currently batteries are addressed in numerous places in the NEC such as Articles 480 and 690, which has been appropriate over time with the former article historically covering lead-acid batteries and the latter recently added to address the application of batteries in general, not just lead acid, to PV systems. The current state of energy storage technology, which includes batteries, and anticipated evolution of energy storage supports the need for a singular set of requirements in the NEC covering such systems. If this is not accomplished in the 2017 NEC and available to serve as a singular foundation for needed changes in the future, the provisions covering such systems will continue to reside in different places within the NEC and likely evolve to attach themselves as parts to existing criteria throughout the NEC. To foster the safe application of energy storage systems and facilitate the application and use of the NEC by technology proponents as well as those who install and inspect such systems there should be a singular article in the NEC on energy storage systems. As covered in the DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA the portfolio of electricity storage technologies can be considered for providing a range of services to the electric grid and can be positioned around their power and energy relationship. This relationship is illustrated in the figure below. The comparisons are very general, intended for conceptual purposes only; many of the storage options have broader duration and power ranges than shown. Panel 13 FD Agenda page 226

268 The range of energy storage technologies and their continuing evolution supports the need for a singular place in the NEC to address the safety of all these systems; safety as it relates to issues relevant to all technologies as well as those issues unique to only one technology. The following provides the information needed to understand each of the sections and subsections in the proposed Article 706, much of which has been derived from existing NEC text. In addition, in composing this new article the NEC TC TF coordinated with a number of other groups and committees developing changes to relevant provisions in the NEC to ensure that the proposed Article 706 in being based on provisions in the 2014 NEC was consistent with those same provisions as they would appear in the 2017 NEC should those proposals to other relevant sections of the NEC be approved. Throughout this substantiation the phrase The source of the proposed text is used to indicate where, if deemed appropriate, the original sections can be consolidated into this new article Scope The scope of the current NEC provisions for storage batteries is covered in of the 2014 NEC. The provisions in have been incorporated into a new Article 706 covering energy storage systems, for which batteries are one type. This new Article 706 is intended to place any and all battery requirements in the NEC in one place, have the new article cover what is currently in Article 480 and allow that article to be removed or simply refer to Article 706. One editorial change has been suggested at the beginning of the text in which is shown in the new article as Informational note 1 has been added to clarify that voltage and power ratings for self-contained systems are available on the nameplate data. Informational note 2 is previous informational note 1 to 480.1, updated to include references to four new documents relevant to energy storage systems (items 9 to 12). Panel 13 FD Agenda page 227

269 706.2 Definitions The source of the proposed definitions is as follows: Battery is a new definition intended to provide details on what constitutes a battery, for which criteria are provided in the new article. Battery Terminal is revised from to add the term Battery, to clarify battery terminals may have specific requirements for the application as provided in the new article, and should not necessarily be considered equivalent to that which is outlined in (A). Cell is from Container is from but modified to update the term and to put the basis for the informational note to the definition in the body of the definition. Diversion Charge Controller is from Electrochemical Battery is a new definition intended to provide details of what constitutes this type of battery, for which criteria are provided in the new article. Electrolyte is from Energy Storage System (ESS) is a new definition intended to provide details of what constitutes an energy storage system, for which criteria are provided in the new article. Energy Storage System, Self-contained is a new definition intended to provide the details of what constitutes this type of system, for which criteria are provided in the new article. Energy Storage System, Pre-engineered of Matched Components is a new definition intended to provide the details of what constitutes this type of system, for which criteria are provided in the new article. Energy Storage System, Other is a new definition intended to provide the details of what constitutes this type of system, for which criteria are provided in the new article. Flowing Electrolyte Battery is a new definition intended to provide the details of what constitutes this type of battery, for which criteria are provided in the new article. Intercell Connector is from Intertier Connector is from Inverter Input Circuit is from modified to clarify the circuit applies to the connection to the area EPS. Inverter Utilization Output Circuit is a new definition to clarify the circuit applies to the connection to utilization loads. Nominal Voltage (Battery or Cell) is from Sealed Cell or Battery is from Panel 13 FD Agenda page 228

270 706.3 Other Articles The provisions for other articles was adopted from and the precedent for the modification or supplement of Chapters 1-4 by such provisions in other special occupancies, equipment and conditions articles of the NEC is well established under The exception that is in covering hazardous locations was not carried forward because it violates the NFPA rule against referencing an entire article of the NEC. If an energy storage system were to be installed in a hazardous location, the provisions of those articles would need to be met since they are specific to certain occupancies, with those articles being additive to the requirements of Article System Classification Criteria have been developed to classify energy storage systems as self-contained, preengineered assemblies of matched components and individual components assembled as a system. The acceptability of self-contained systems or pre-engineered systems of matched components is intended to rest in part on the system and components being tested and listed to applicable standards and installed in accordance with the terms of the listing, manufacturer s installation instructions and the applicable provisions of Article 706. The acceptability of other systems is also intended to rest on the components being tested and listed as covered above but also having all the provisions of Article 706 cover their assembly and installation to create an energy storage system Equipment This requirement is adopted from 690.4(B) and applies equally to energy storage systems as intended to be covered in Article 706. The language from 690.4(B) speaks to the acceptability of individual components of the PV system, which appears appropriate for energy storage systems as well. That said there are also self-contained energy storage systems that as a whole can be tested and listed to appropriate safety standards and to address this situation an additional sentence has been added. The last sentence addresses inverters listed and identified as interactive as those only being permitted on interactive systems Multiple Systems This section clarifies that more than one ESS can be installed on a building or structure. This parallels Article 690.4(D), both 2014 and as revised by SEIA/SolarABCs Proposal. Due to the many current and future applications for batteries and ESS, it is likely that more than one ESS may reside within a building as a normal condition. Provisions are given elsewhere in this article to ensure all such systems are identified and controlled. Panel 13 FD Agenda page 229

271 706.7(A) ESS Disconnecting Means, The source of the proposed text is 480.6(A), with the modification to apply to all ungrounded conductors, regardless of voltage, except as modified by other provisions of this Article. The term battery has been replaced with ESS, as the requirement is intended to apply to all forms of energy storage (B) Remote Actuation and 706.7(C) Busway The source of the proposed text is 480.6(B) and (C), and are equally applicable to ESS intended to be covered in Article 706. The term battery has been replaced with ESS, as the requirement is intended to apply to all forms of energy storage (D) Notification The source of the proposed text is 480.6(D), with the incorporation of an additional requirement addressing arc flash hazard based on work undertaken by the IEEE Stationary Battery Committee in a proposal to 480.6(D). This new language is added to this proposal to ensure that all requirements for batteries and energy storage systems are adequately addressed. The requirement for marking maximum available short circuit current derived from the ESS is retained in this proposal, as this information is needed for selection and coordination of overcurrent protective devices. The notification and marking requirements is equally applicable to ESS intended to be covered in Article 706. The term battery has been replaced with ESS, as the requirement is intended to apply to all forms of energy storage. The informational note has been expanded to refer to NFPA 70E for arc flash calculations. Specifically NFPA 70E, 320.3(A)(5) provides guidance for signage about arc flash for the entire ESS (E) Partitions and Distance The source of the proposed text is (H), with revision of the title to clarify that the disconnects and overcurrent requirements of this rule apply to installations where the ESS circuits pass through a wall or partition, or where there is sufficient distance between the ESS and connected equipment to require additional levels of protection. List item #5 is revised to clarify that it applies to other ESS disconnecting means. Note that while Article 690 applies to PV systems there are a number of other systems that could employ energy storage systems, such that what is adapted from Article 690 for inclusion in Article 706 can be applied to any systems to which the energy storage system is connected Connection to other energy sources While some ESS systems may be straightforward and direct with a single device serving both as ESS charging and supply to utilization loads, other systems may be more complex. The output of an energy storage device may be ac, in some applications the ESS may be connected to other Panel 13 FD Agenda page 230

272 sources on the dc level addresses the considerations that must be addressed when interconnecting multiple power sources to ensure proper coordination between overcurrent protection, conductor and busbar ampere ratings, and currents available. By directing installers and AHJs to there can be one primary location for addressing the requirements necessary for interconnecting multiple energy sources Energy Storage System Locations The source of the proposed text is 480.9(A), (B), (C), (E) and (G) and is equally applicable to all ESS intended to be covered in Article 706. Article list items (D) and (F) have been addressed elsewhere in this proposed article, under the requirements specific to electrochemical energy storage systems. Additional guidance is given to allow pre-engineered or self-contained ESS to follow manufacturer s recommendations and listed instructions. The term battery has been replaced with energy storage or ESS, as the requirement is intended to apply to all forms of energy storage. Based upon work undertaken by the IEEE Stationary Battery Committee on 480.9(A), a new Informational Note 3 provides a reference to IEEE 1635 as a guide for ventilation of various types of batteries in a variety of enclosures and operating conditions. The primary purpose of this referenced document developed jointly by IEEE and ASHRAE is to assist users involved in the design and management of new stationary battery installations, with the focus being the environmental design and management of the installation to maximize battery reliability as well as the safety of personnel and equipment Directory A permanent plaque or directory of all interconnected energy sources is an essential requirement both for service personnel as well as for first responders in case of emergency. The provision for 706.9(A) is adopted from , to harmonize with the requirements for interconnected energy sources. The source of the proposed text for 706.9(B) is (A), addressing stand-alone systems which may not have the service entrance typically used by first responders in the case of an emergency. The intent is to have markings provided at or near the system and its components to facilitate the proper identification of those items. In addition where a system is located in, on or adjacent to a building or on a site it is important to have directional and other signs covering the access to and warnings associated with the system. The issue of marking and signage needs to be covered within the system and adjacent the system as well as in locations where the system may not be visible or must be accessed from outside a building or facility. The term PV is replaced with ESS to clarify that this requirement applies to any stand-alone system, whether or not PV is present, thereby closing a previous unintended loophole where stand-alone systems without PV may not have been required to provide such a directory. Panel 13 FD Agenda page 231

273 Circuit sizing and current Installers and AHJ s need to properly evaluate and coordinate the conductors and OCPD devices for all circuits associated with the energy storage system. In addition, the output of the ESS may be ac, dc, or both depending upon the technology and topology. As such, clear guidance needs to be provided to determine the necessary calculations (A) outlines and defines the requirements for circuit conductors in and connected to the ESS (A)(1) addresses applications where a pre-engineered, self-contained or listed product is being evaluated, and directs the use of the nameplate rated circuit current. This language is adopted from 692.8(A) (A)(2) addresses the output circuits to the area EPS, and is adopted from 690.8(A)(3). The source of the proposed text for (A)(3) is 690.8(A)(4), and addresses the circuits between the inverter and the energy storage device (A)(4) Inverter Utilization Output Circuit Current is new language to define the output circuits between the inverter and utilization loads. This language is needed to more clearly differentiate between the conductors to the area EPS and conductors to the distribution panelboard for stand-alone and multimode inverters. The source of the proposed text for (A)(5) is 690.8(A)(5) (B) ensures that the ampacity of conductors in the circuits described in (A) are coordinated with the device rating, maximum current or overcurrent protective device in the circuit. This language is adopted from 692.8(B) (C) ensures that the ampacity of the neutral or grounded conductor is not exceeded if an ESS with a single-phase 2-wire output is connected. This language is adopted from 692.8(C), and is required as many products of this configuration are available on the market and may reasonably be used to serve protected plug loads Overcurrent protection (A) ensures circuits and equipment are protected according to the following five requirements, and protected at the source from overcurrent. This language is adopted from 690.9(A). The term battery has been replaced with ESS, as the requirements are intended to apply to all forms of energy storage (B) ensures OCP is rated at least 125% of the currents as calculated above. This language is adopted from 690.9(B) (C) ensures overcurrent devices used in dc circuits are listed and have sufficient ratings for the application. This language is adopted from 690.9(C). Panel 13 FD Agenda page 232

274 The source of the proposed text for (D) is 480.5, and addresses specific requirements for conductors used to provide starting, ignition and control of prime movers. The source of the proposed text for (E) is (C), and ensures current-limiting devices are installed as appropriate. Work undertaken by the IEEE Stationary Battery Committee on Article 690 is also included to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. Overcurrent protection is needed regardless of the voltage (F) ensures that means are provided to allow any fuses accessible to other than qualified persons to be disconnected from all energy sources. This language is adopted from (A) and enhanced to better address how to protect persons who may need to service such equipment. As these systems may have multiple sources of energy, this requirement will ensure that any accessible fuses can be safely serviced Wiring from and equipment supplied by energy storage systems The source of the proposed text is 480.4, as modified as appropriate to refer to ESS Charge Control The source of the proposed text for (A) is (A), as modified to delete the reference to PV source circuits where the voltage rating and charge current requirements are matched as not appropriate for the scope of this article. The text has been modified as appropriate to refer to ESS. Provisions have been retained to ensure any adjustable settings shall be accessible only by qualified persons. The source of the proposed text (B) is (B), modified as appropriate to refer to ESS. Reference to a PV power system has been deleted, as these requirements should apply to any diversion charge controller, regardless of charging source. The text has also been modified as it relates to charge regulation circuits because mandating such circuits comply with the ampacity requirements for flexible cords and cable seems nonsensical or archaic. The conductor requirements are already better addressed through other provisions of the code and have been referenced to by in the proposed new article where they are covered. The source of the proposed text (C) is (C). The list heading has been modified to change buck/boost to charge controllers because the former text is an electrical topography and has little bearing on electrical safety. The new text focusing the section on charge controllers applies more generic and appropriate terms for the purpose of this article. The text format has been changed to put the subdivision portions within the body of the parent. Panel 13 FD Agenda page 233

275 Part III Electrochemical Energy Storage Systems A separate part of Article 706 is included to augment the provisions in Part I General and Part II Circuit Requirements. Those provisions are applicable to all energy storage systems and the provisions in Part III would then apply along with those but only to electrochemical technologies (e.g. batteries). The requirements of this section are intended to address attributes, conditions and hazards specific to electrochemical storage devices such as lead acid, alkali and lithium-ion chemistries. Subsequent parts will address attributes of other technologies as required, to ensure that the requirements specific to one type of system, for example a flooded lead acid battery, are not inadvertently applied to another such as a flywheel ESS, or the reverse Installation of batteries The source of the proposed text is (A), with modifications. The direction to consider the interconnected battery to be grounded where the connected PV system is installed in accordance with [PV] System Grounding is deleted; without this modification for special equipment installers and AHJs can refer to Articles 1-4, specifically 250.4, for guidance on all energy storage systems except where required otherwise elsewhere in this proposed article. By deleting this modification, this article more closely aligns with 480 where all ESS can be installed according to 250.4, unless modified elsewhere, regardless of what charging sources may be present or interconnected, or how those sources derive their ground reference. The limitation of application to solar PV systems is deleted, as these requirements are intended to apply to all electrochemical ESS, regardless of charging source or other interconnected sources. The term storage batteries has been replaced with ESS, as the requirement is intended to apply to all forms of electrochemical ESS (A) Dwelling Units, (A)(1) Operating Voltage. The source of the proposed text is (B)(1), with modifications to eliminate the word nominal, and provide a maximum voltage threshold under conditions of use. This proposal aligns with work undertaken by the IEEE Stationary Battery Committee and other groups on Article 690 to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. It should be emphasized that revising 50 volts, nominal to the proposed language will not present any increase in exposure or risk to installers or system operators as it does not change the equipment, certifications or conditions of the installation, but simply recognizes the true voltage exposure that has been present in systems for decades while giving clear guidance to properly address new technologies coming to market. While nominal voltages may be referenced elsewhere in the Code, (B)(1) is one of the few places where a nominal voltage is used to define a limit or threshold. The very uncertainty of nominal creates a lack of clarity that can and should be better defined under actual Panel 13 FD Agenda page 234

276 conditions of use. Selecting and coordinating equipment based on nominal voltages may cause inadvertent error by the installer or AHJ. Standard sealed (VRLA) batteries have an open circuit (resting) voltage of 2.15 VPC or 51.6 VDC per 24 cells, with voltage under normal charge conditions rising to 2.4 VPC or 57.6 VDC per 24 cells. Many flooded lead acid (FLA) batteries require periodic equalization voltages exceeding 2.7 VPC (65 VDC per 24 cells) for proper operation. Therefore, the normal operation and requirements of familiar technologies that have over 100 years of history and acceptance are well beyond 50 volts. In addition, many battery technologies are available or coming to market which may have different nominal voltage per cell characteristics than traditional lead acid battery technologies, and much different voltage profiles while charging or discharging. The Code should provide prescriptive guidance to installers and AHJs on how to evaluate these new technologies based on relevant and available factors to ensure devices are selected and coordinated for the actual conditions of use. The so-called 50 volt rule should not be used in relation to modern energy storage systems. Storage batteries used in stationary power systems do not fit the characteristics of Class 2 or Class 3 limited power circuits, so Chapter 9, Table 11(B) does not apply. NFPA 70E Table 130.4(C)(b) for determining approach boundaries for energized DC voltage systems considers all DC voltages less than 100V to be equivalent and in one category (A)(2) Guarding of live parts The source of the proposed text is (B)(2), with modifications. The term battery has been replaced with ESS, as the requirement addressing guarding of live parts is equally applicable to all forms of electrochemical energy storage. The informational note has been deleted as not being relevant to all energy storage systems. The charge-discharge cycles of the application, and the maintenance requirements if any of the specific chemistry or construction, can best be determined by following the manufacturer s directions, rather than an informational note (B) Storage system nonconductive cases and conductive racks The source of the proposed text is (D), with modifications. The second paragraph of what was (D) should be an Exception, and the proposed text has been revised accordingly. The text has also been modified to replace the phrase twenty-four 2-volt cells are connected in series (48 volts, nominal) and provide a maximum voltage threshold under conditions of use. This proposal aligns with work undertaken by the IEEE Stationary Battery Committee and other groups on Article 690 to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. It should be emphasized that the proposed language will not present any increase in exposure or risk to installers or system operators as it does not change the equipment, certifications or conditions of the installation, but simply recognizes the true voltage exposure that has been present in systems for decades Panel 13 FD Agenda page 235

277 while giving clear guidance to properly address new technologies coming to market. While nominal voltages may be referenced elsewhere in the Code, (B)(1) is one of the few places where a nominal voltage is used to define a limit or threshold. The very uncertainty of nominal creates a lack of clarity that can and should be better defined under actual conditions of use. Selecting and coordinating equipment based on nominal voltages may cause inadvertent error by the installer or AHJ. Standard sealed (VRLA) batteries have an open circuit (resting) voltage of 2.15 VPC or 51.6 VDC per 24 cells, with voltage under normal charge conditions rising to 2.4 VPC or 57.6 VDC per 24 cells. Many flooded lead acid (FLA) batteries require periodic equalization voltages exceeding 2.7 VPC (65 VDC per 24 cells) for proper operation. Therefore, the normal operation and requirements of familiar technologies that have over 100 years of history and acceptance are well beyond 50 volts. In addition, many battery technologies are available or coming to market which may have different nominal voltage per cell characteristics than traditional lead acid battery technologies, and much different voltage profiles while charging or discharging. The Code should provide prescriptive guidance to installers and AHJs on how to evaluate these new technologies based on relevant and available factors to ensure devices are selected and coordinated for the actual conditions of use. The so-called 50 volt rule should not be used in relation to modern energy storage systems. Storage batteries used in stationary power systems do not fit the characteristics of Class 2 or Class 3 limited power circuits, so Chapter 9, Table 11(B) does not apply. NFPA 70E Table 130.4(C)(b) for determining approach boundaries for energized DC voltage systems considers all DC voltages less than 100V to be equivalent and in one category (C) Disconnection of Series Battery Circuits The source of the proposed text is (E), with modifications to replace the phrase twentyfour 2-volt cells are connected in series (48 volts, nominal) and provide a maximum voltage threshold under conditions of use. This proposal aligns with work undertaken by the IEEE Stationary Battery Committee and other groups on Article 690 to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. It should be emphasized that the proposed language will not present any increase in exposure or risk to installers or system operators as it does not change the equipment, certifications or conditions of the installation, but simply recognizes the true voltage exposure that has been present in systems for decades while giving clear guidance to properly address new technologies coming to market. While nominal voltages may be referenced elsewhere in the Code, (B)(1) is one of the few places where a nominal voltage is used to define a limit or threshold. The very uncertainty of nominal creates a lack of clarity that can and should be better defined under actual conditions of use. Selecting and coordinating equipment based on nominal voltages may cause inadvertent error by the installer or AHJ. Standard sealed (VRLA) batteries have an open Panel 13 FD Agenda page 236

278 circuit (resting) voltage of 2.15 VPC or 51.6 VDC per 24 cells, with voltage under normal charge conditions rising to 2.4 VPC or 57.6 VDC per 24 cells. Many flooded lead acid (FLA) batteries require periodic equalization voltages exceeding 2.7 VPC (65 VDC per 24 cells) for proper operation. Therefore, the normal operation and requirements of familiar technologies that have over 100 years of history and acceptance are well beyond 50 volts. In addition, many battery technologies are available or coming to market which may have different nominal voltage per cell characteristics than traditional lead acid battery technologies, and much different voltage profiles while charging or discharging. The Code should provide prescriptive guidance to installers and AHJs on how to evaluate these new technologies based on relevant and available factors to ensure devices are selected and coordinated for the actual conditions of use. The so-called 50 volt rule should not be used in relation to modern energy storage systems. Storage batteries used in stationary power systems do not fit the characteristics of Class 2 or Class 3 limited power circuits, so Chapter 9, Table 11(B) does not apply. NFPA 70E Table 130.4(C)(b) for determining approach boundaries for energized DC voltage systems considers all DC voltages less than 100V to be equivalent and in one category (D) Storage system maintenance disconnecting means The source of the proposed text is (E), with modifications to replace the phrase twentyfour 2-volt cells are connected in series (48 volts, nominal) and provide a maximum voltage threshold under conditions of use. This proposal aligns with work undertaken by the IEEE Stationary Battery Committee and other groups on Article 690 to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. It should be emphasized that the proposed language will not present any increase in exposure or risk to installers or system operators as it does not change the equipment, certifications or conditions of the installation, but simply recognizes the true voltage exposure that has been present in systems for decades while giving clear guidance to properly address new technologies coming to market. While nominal voltages may be referenced elsewhere in the Code, (B)(1) is one of the few places where a nominal voltage is used to define a limit or threshold. The very uncertainty of nominal creates a lack of clarity that can and should be better defined under actual conditions of use. Selecting and coordinating equipment based on nominal voltages may cause inadvertent error by the installer or AHJ. Standard sealed (VRLA) batteries have an open circuit (resting) voltage of 2.15 VPC or 51.6 VDC per 24 cells, with voltage under normal charge conditions rising to 2.4 VPC or 57.6 VDC per 24 cells. Many flooded lead acid (FLA) batteries require periodic equalization voltages exceeding 2.7 VPC (65 VDC per 24 cells) for proper operation. Therefore, the normal operation and requirements of familiar technologies that have over 100 years of history and acceptance are well beyond 50 volts. In addition, many battery technologies are available or coming to market which may have different nominal Panel 13 FD Agenda page 237

279 voltage per cell characteristics than traditional lead acid battery technologies, and much different voltage profiles while charging or discharging. The Code should provide prescriptive guidance to installers and AHJs on how to evaluate these new technologies based on relevant and available factors to ensure devices are selected and coordinated for the actual conditions of use. The so-called 50 volt rule should not be used in relation to modern energy storage systems. Storage batteries used in stationary power systems do not fit the characteristics of Class 2 or Class 3 limited power circuits, so Chapter 9, Table 11(B) does not apply. NFPA 70E Table 130.4(C)(b) for determining approach boundaries for energized DC voltage systems considers all DC voltages less than 100V to be equivalent and in one category The term battery has been replaced with ESS or Storage System, as the requirement is intended to apply to all forms of electrochemical energy storage. Photovoltaic has been replaced as this requirement is intended to apply to all electrochemical ESS that meet these parameters (E) Storage systems of more than 100 volts The source of the proposed text is (E), with modifications. The requirement for PV circuit source and output grounding methods is deleted; without this modification for special equipment installers and AHJs can refer to Articles 1-4, specifically 250.4, for guidance on all energy storage systems except where required otherwise elsewhere in this proposed article. By deleting this modification, this article more closely aligns with 480 where all ESS can be installed according to 250.4, unless modified elsewhere, regardless of what charging sources may be present or interconnected, or how those sources derive their ground reference. The requirement relative to load circuits is deleted; without this modification for special equipment installers and AHJs can refer to Articles 1-4, specifically 250.4, for guidance on the grounding of load or utilization circuits. The requirement for disconnecting means and overcurrent protection for all ungrounded circuit conductors is addressed in the general requirements of this article, as they apply to all ESS. The requirement for ground fault detection and indication for electrochemical ESS operating under the voltage parameters of this section is retained in this proposal. The reference to 48 Volts and the phrase twenty-four 2-volt cells are connected in series (48 volts, nominal) has been replaced to provide a maximum voltage threshold under conditions of use. This proposal aligns with work undertaken by the IEEE Stationary Battery Committee and other groups on Article 690 to ensure that if this new article is accepted the revisions deemed appropriate for Article 690 are also included. It should be emphasized that the proposed language will not present any increase in exposure or risk to installers or system operators as it does not change the equipment, certifications or conditions of the installation, but simply recognizes the true voltage exposure that has been present in systems for decades while giving clear guidance to properly address new technologies coming to market. While Panel 13 FD Agenda page 238

280 nominal voltages may be referenced elsewhere in the Code, (B)(1) is one of the few places where a nominal voltage is used to define a limit or threshold. The very uncertainty of nominal creates a lack of clarity that can and should be better defined under actual conditions of use. Selecting and coordinating equipment based on nominal voltages may cause inadvertent error by the installer or AHJ. Standard sealed (VRLA) batteries have an open circuit (resting) voltage of 2.15 VPC or 51.6 VDC per 24 cells, with voltage under normal charge conditions rising to 2.4 VPC or 57.6 VDC per 24 cells. Many flooded lead acid (FLA) batteries require periodic equalization voltages exceeding 2.7 VPC (65 VDC per 24 cells) for proper operation. Therefore, the normal operation and requirements of familiar technologies that have over 100 years of history and acceptance are well beyond 50 volts. In addition, many battery technologies are available or coming to market which may have different nominal voltage per cell characteristics than traditional lead acid battery technologies, and much different voltage profiles while charging or discharging. The Code should provide prescriptive guidance to installers and AHJs on how to evaluate these new technologies based on relevant and available factors to ensure devices are selected and coordinated for the actual conditions of use. The so-called 50 volt rule should not be used in relation to modern energy storage systems. Storage batteries used in stationary power systems do not fit the characteristics of Class 2 or Class 3 limited power circuits, so Chapter 9, Table 11(B) does not apply. NFPA 70E Table 130.4(C)(b) for determining approach boundaries for energized DC voltage systems considers all DC voltages less than 100V to be equivalent and in one category The term battery has been replaced with ESS or Storage System, as the requirement is intended to apply to all forms of electrochemical energy storage. Photovoltaic has been replaced as this requirement is intended to apply to all electrochemical ESS that meet these parameters Battery and cell terminations, (A) Corrosion Prevention The source of the proposed text is 480.3(A), with modifications. Work undertaken by the IEEE Stationary Battery Committee on 480.3(A) is also included in proposed Article 706 to ensure that if this new article is accepted the revisions deemed appropriate for Article 480 are also included. Those revisions delete the reference to dissimilar metals and replace it with corrosion prevention to better convey the subject matter addressed in (A). The additional requirement relating to the battery or cell manufacturer and deletion of the text on dissimilar metals is included because it is not realistic that the AHJ will be able to determine if dissimilar metals are present. Note that not all batteries, especially those with new technologies and construction, require antioxidant. As some antioxidant materials can damage battery containers (cases) the reference to the manufacturer s recommendations is included to ensure that antioxidant grease should only be used when recommended by the battery Panel 13 FD Agenda page 239

281 manufacturer. This requirement is applicable to electrochemical energy storage systems, which include batteries, and has been included in the new article on energy storage systems since the intent is to have the new article cover what is currently in Article 480 and allow that article to be removed or simply refer to Article (B) Intercell and Intertier Conductors and Connections The source of the proposed text is 480.3(B), with no modifications, as it applies as written to its intended use in Article 706 for energy storage systems (C) Battery Terminals The source of the proposed text is 480.3(C), with no modifications, as it applies as written to its intended use in Article 706 for energy storage systems Battery interconnections The source of the proposed text is (A) with modifications to delete the requirement to be listed for hard service use. Work undertaken by Task Group E is also included in proposed Article 706 to ensure that if this new article is accepted the revisions deemed appropriate are also included. Conductors and battery cables are available from multiple sources with appropriate and sufficient Article 300 ratings for the application, however these same conductors seldom also carry an Article 400 designation for hard-service use. As these applications are to be permanently installed, Article 300 ratings should prevail Accessibility The source of the proposed text is 480.8(C), with no modifications, as it applies as written to its intended use in Article 706 to address the accessibility of cell terminals associated with electrochemical storage technologies covered by part III of Article 706. Note that this augments the provisions in part I regarding accessibility and working space, which apply to all energy storage systems Battery Location The source of the proposed text is 480.9, with modifications. The term electrochemical has been added, as the requirement is intended to apply to all forms of electrochemical battery ESS. The subsequent list of requirements is narrowed to requirements specific to electrochemical batteries. Note that this section augments the provisions in part I regarding energy storage system locations, which apply to all ESS (A) Live Parts. The source of the proposed text is 480.9(B), with no modifications, as it applies as written to its intended use in Article 706 for energy storage systems. Note that this section augments the provisions in part I regarding energy storage system locations, which apply to all ESS. Panel 13 FD Agenda page 240

282 706.34(B) Top Terminal Batteries The source of the proposed text is 480.9(D), with modifications. The term electrochemical energy storage device has been added, as the requirement is intended to apply to all forms of top terminal electrochemical ESS. Additional language has been added to address the situation where a self-contained system that is covered by Part I General in Article 706 would likely have necessary working space within the system and between system components covered in the listing and manufacturer s installation instructions. Work undertaken by the IEEE Stationary Battery Committee on 480.9(D) is also included in proposed Article 706 to ensure that if this new article is accepted the revisions deemed appropriate for Article 480 are also included. The text in 480.9(D) is modified to add battery cabinets, which may present greater hazards due to insufficient clearance for maintenance activities yet are not sufficiently addressed by the previous language. A new informational note is added to reference IEEE 1187, in which section 5.2 recommends top clearances proportional to the depth of the cabinet. Note that this section augments the provisions in part I regarding energy storage system locations, which apply to all ESS (C) Gas piping The source of the proposed text is 480.9(F), with modifications to clarify that gas piping shall not be installed in spaces dedicated to electrochemical energy storage systems, as the requirement is intended to apply to all forms of electrochemical battery ESS. Note that this section augments the provisions in part I regarding energy storage system locations, which apply to all ESS (A) Vented Cells The source of the proposed text is (A) with modifications. Considering the current text in the NEC, an AHJ can verify that a flame arrester is installed, but cannot determine whether the flame arrester is properly designed. As such the last portion of the section is not enforceable and is moved to a new informational note. This requirement is applicable to electrochemical energy storage systems, which include batteries, and has been included in the new article on energy storage systems since the intent is to have the new article cover what is currently in Article 480 and allow that article to be removed or simply refer to Article 706. Work undertaken by the IEEE Stationary Battery Committee on (A) is also included in proposed Article 706 to ensure that if this new article is accepted the revisions deemed appropriate for Article 480 are also included (B) Sealed Cells The source of the proposed text is (B) with modifications. These revisions add permission to provide the vents as opposed to mandating them in all cases. The present text requires a pressure release valve, which is typical primarily of VRLA cells. Sealed cells with non- Panel 13 FD Agenda page 241

283 aqueous electrolyte do not require a pressure release valve. The second clause is deleted because it has nothing to do with venting. Work undertaken by the IEEE Stationary Battery Committee on (B) is included in proposed Article 706 to ensure that if this new article is accepted the revisions deemed appropriate for Article 480 are also included. This requirement is applicable to electrochemical energy storage systems, which include batteries, and has been included in the new article on energy storage systems since the intent is to have the new article cover what is currently in Article 480 and allow that article to be removed or simply refer to Article 706. Part IV Flowing Electrolyte Energy Storage Systems A separate part of Article 706 is included to augment the provisions in Part I General and Part II Circuit Requirements. Those provisions are applicable to all energy storage systems and the provisions in Part IV would then apply along with those but only to flowing electrolyte energy storage systems, also known as flow batteries. The requirements of this section are intended to address attributes, conditions and hazards specific to flowing electrolyte storage devices. As described in the DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA vanadium reduction and oxidation (redox) batteries are of a type known as flow batteries, in which one or both active materials is in solution in the electrolyte at all times. In this case, the vanadium ions remain in an aqueous acidic solution throughout the entire process. The vanadium redox flow battery is a flow battery based on redox reactions of different ionic forms of vanadium. During battery charge, V3+ ions are converted to V2+ ions at the negative electrode through the acceptance of electrons. Meanwhile, at the positive electrode, V4+ ions are converted to V5+ ions through the release of electrons. Both of these reactions absorb the electrical energy put into the system and store it chemically. During discharge, the reactions run in the opposite direction, resulting in the release of the chemical energy as electrical energy. While these systems may tend to be large and installed on the utility side of the meter it is possible they could also be installed in locations within the scope of the NEC. Criteria have been added to Article 706 to address this energy storage technology and a definition of flowing electrolyte energy storage systems has been added to A scope statement is provided in to target this specific technology, which as noted is defined in Many aspects of flowing electrolyte storage devices are similar to fuel cell systems, although there are differences. As this technology is in the early stages of commercialization yet installers and AHJs need guidance on how to properly evaluate these systems, directs flowing electrolyte storage systems to the applicable provisions of Article 692. General provisions are included as and are intended to ensure that the system and its components that are connected to building electrical systems for both supply to and output from the system are installed in accordance with the NEC. Panel 13 FD Agenda page 242

284 To preclude the mistaken introduction of an incorrect or improper electrolyte into the system provides for the identification and permanent marking and signage covering the electrolyte(s) that can be used in the system. Because there could be a unintended leak of electrolyte addresses that issue via containment and an alarm that indicates there is leakage as well as ensuring electrical wiring and connections not be located in a containment area. Flow controls to automatically shut the system down in case there is an issue with electrolyte flow are provided in , and ensures those components of the system that handle the flow of the electrolytes are evaluated to be acceptable for use with the electrolytes. Part V Kinetic Energy Storage Systems A separate part of Article 706 is included to augment the provisions in Part I General and Part II Circuit Requirements. There is another type of system that entails storing kinetic energy through mechanical means and then when electrical energy is needed using that stored kinetic energy to generate the needed electrical power. The intent of Part V is to specifically cover these systems, which include flywheels and compressed air, over and above the requirements outlined in Parts I and II. Those provisions are applicable to all energy storage systems, and the provisions in Part V would then apply along with those but only to kinetic energy storage systems. The requirements of this section are intended to address attributes, conditions and hazards specific to these storage devices. As described in the DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA flywheels store energy in the form of the angular momentum of a spinning mass, called a rotor. The work done to spin the mass is stored in the form of kinetic energy. A flywheel system transfers kinetic energy into ac power through the use of controls and power conversion systems. Most modern flywheel systems have some type of containment for safety and performance-enhancement purposes. This containment is usually a thick steel vessel surrounding the rotor, motor-generator, and other rotational components of the flywheel. If the wheel fractures while spinning, the containment vessel would stop or slow parts and fragments, preventing injury to bystanders and damage to surrounding equipment. Containment systems are also used to enhance the performance of the flywheel. The containment vessel is often placed under vacuum or filled with a low-friction gas such as helium to reduce the effect of friction on the rotor. Similarly, as described in the DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA compressed systems use off-peak electricity to compress air and store it in a reservoir. When electricity is needed, the compressed air is heated, expanded, and directed through an expander or conventional turbine-generator to produce electricity. Aboveground air storage would typically be sized with capacities on the order of 3 to 50 MW and discharge times of 2 to 6 hours. Panel 13 FD Agenda page 243

285 Criteria have been added to Article 706 to address these energy storage technologies. General provisions are included as and are intended to ensure that the system and its components that are connected to building electrical systems for both supply to and output from the system are installed in accordance with the NEC. Because they could be considered similar to a generator, in terms of connections to and from the device an informational note is added suggesting that in applying the NEC to the electrically related portions of the system those issues can be addressed in a similar manner to those in the NEC covering generators. Provisions not carried forward Beyond the specific mapping presented above between current provisions of the NEC and their location in the proposed Article 706 there were some provisions that currently exist in the NEC that are applicable to batteries but were not carried over. These are outlined below and were not carried over because others outside the DC TG working on revisions to those articles, as covered above, decided to delete certain provisions in the current NEC. The DC TG had initially drafted Article 706 to include a provision for insulation of batteries not over 250 volts. This was to be based on of the NEC. In coordination with the IEEE SBC it was determined that In looking at the provisions of on insulation of batteries of the NEC for the intent of moving them into Article 706 it was noted that In the NEC-2014 a paragraph titled Insulation of Batteries Over 250 Volts was deleted but the NEC did not revise the corresponding paragraph for smaller batteries. So today users and AHJ s are confused as to What am I supposed to do for batteries NOT over 250 Volts? For this reason was not carried over in Article 706. The IEEE SBC deleted and its subsections (A) to (D) below because they no longer serve useful or enforceable guidance. The circumstances for which these guidelines were originally created no longer exist. Batteries can have a conductive shell around the container(s), but no battery is made with conductive containers. Such a design would guarantee a short circuit. We will need to determine what if any other provisions in the NEC from 480, 690 or elsewhere we did not carry forward. I don t think there are many if any more but if there are we need to ID them and advise why we did not bring them forward. Panel 13 FD Agenda page 244

286 of /25/2014 3:52 PM Public Input No NFPA [ Global Input ] This PI proposes a new Article 706 covering Energy Storage Systems (ESS). Two versions of this new article are being submitted by the NEC DC Task Group. One with this PI and the other with a companion PI. Each is identified with a unique date. Each version is provided as a clean copy and one with track changes containing notes from the task group discussions for the benefit of the panel. Each version is provided with its own substantiation. This PI covers the version. A file containing the task group members is provided. The four files provided with this PI are identified as follows. 1. NEC article 706 on ESS Final_Clean copy_ NEC article 706 on ESS Final w_track changes_ Substantiation for Article 706 Final_ NEC DC Task Group Members Type your content here... Additional Proposed Changes File Name Description Approved NEC_article_706_on_ESS_Final_Clean_copy_ docx NEC_article_706_on_ESS_Final_w_track_changes_ docx Substantiation_for_Article_706_Final_ docx Contact_List_-_NEC_DC_TG.pdf This Public Input was developed by the DC Task Group of the NEC Technical Correlating Committee. The DC Task Group is chaired by John R. Kovacik, UL LLC. The Article 706 subcommittee of the task group was chaired by David Conover of PNNL. The participants in the Task Group and their employers/associations are listed in a separate file provided with this PI. It is difficult to prepare a complex NEC Article like this, combining input from many different sources and other working groups (including the IEEE battery group, and the Article 690 task group), and other organizations such as NEMA and many companies, including manufacturers of equipment covered by this new article. The Task Group for this work had 79 members. We are submitting two versions of the proposed new article: 1. A version dated October 30 with background information and comments included. 2. A version dated November 4. This is a reformat and a modification of version 1. The reason for the two versions is that we had insufficient time to complete the task of creating the final Article, and fully cross-checking all input with final text. We understand that this work will likely continue under a CMP13 task group, appointed by the CMP chair. By providing both documents, we show both the ultimate intended form of the article (version dated November 4), and the full list of content that was researched and proposed (version dated October 30). Please refer to the file provided with this PI which contains the complete substantiation. Related Public Inputs for This Document Panel 13 FD Agenda page 245

287 of /25/2014 3:52 PM Related Input Public Input No NFPA [Global Input] Relationship A second version of new Article 706 submitted by the NEC DC Task Group. Submitter Full Name: John Kovacik Organization: UL LLC Submittal Date: Thu Nov 06 15:00:34 EST 2014 Copyright Assignment I, John Kovacik, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment. By checking this box I affirm that I am John Kovacik, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature Panel 13 FD Agenda page 246

288 ARTICLE 706 Energy Storage Systems I. General Scope. This article applies to all hard wired installations of energy storage systems. Informational Note No. 1. Operating voltages and power ratings for pre-packaged and self-contained energy storage systems are typically found on the equipment nameplate data. Informational Note No. 2: The following standards are frequently referenced for the installation of stationary batteries: (1) IEEE , Recommended Practice for Installation Design and Installation of Vented Lead-Acid Batteries for Stationary Applications (2) IEEE , Recommended Practice for Sizing Vented Lead-Acid Storage Batteries for Stationary Applications. (3) IEEE , Recommended Practice for Installation and Maintenance of Nickel-Cadmium Batteries for Photovoltaic (PV) Systems (4) IEEE , Recommended Practice for Installation Design, and Installation of Valve-Regulated Lead-Acid Batteries for Stationary Applications (5) IEEE (Rev. 2003), IEEE Guide for the Protection of Stationary Battery Systems (6) IEEE , Recommended Practice for Stationary Battery Spill Containment and Management (7) IEEE 1635/ASHRAE , Guide for the Ventilation and Thermal Management of Stationary Battery Installations (8) UL 1973, Batteries for Use in Light Electric Rail (LER) Applications and Stationary Applications (9) UL Subject 2436, Spill Containment For Stationary Lead Acid Battery Systems (10) UL 1989, Standby Batteries Informational Note No. 3: UL 810A, Electrochemical Capacitors is frequently referenced for the installation of electrolytic capacitors Panel 13 FD Agenda page 247

289 706.2 Definitions Battery. Two or more cells connected together electrically in series, in parallel, or both to provide the required operating voltage and current levels. Cell. The basic electrochemical unit of a battery, characterized by a negative electrode (anode) and a positive electrode (cathode), used to receive, store, and deliver electrical energy. Container, Battery. A vessel that holds the plates, electrolyte, and other elements of a single unit, comprised of one or more cells, in a battery. It can be referred to as a jar or case. Diversion Charge Controller. Equipment that regulates the charging process of an energy storage device by diverting power from energy storage to direct-current or alternating-current loads or to an interconnected utility service. Electrochemical Capacitor. An electric energy storage device where electrical charge is typically stored as a result of non-faradaic reactions at the electrodes, which have a highlyporous surface, increasing the surface area for holding charge, and resulting in much larger capacitance and energy density. Electrochemical capacitors employ a liquid dielectric with charge occurring at the liquid-solid interface of the electrodes when an electrical potential is applied. Informational Note: A subset of electrochemical capacitors referred to as an asymmetric reactions at one electrode and Faradaic reactions at the other electrode. Informational Note: Some other names for these capacitors include: electrochemical capacitor are double layer capacitor, ultra capacitor, electrochemical double layer capacitor, super capacitor, and EDLC. Electrolyte. The medium that provides the ion transport mechanism between the positive and negative electrodes of a cell. Energy Storage System (ESS). A device or more than one device assembled together capable of storing energy for use at a future time. Energy storage systems include but are not limited to electrochemical storage devices (batteries), flow batteries, -capacitors, and kinetic devices (flywheels, and compressed air). These systems can have ac or dc output for utilization and can include inverters and converters to change stored energy into electrical energy. Panel 13 FD Agenda page 248

290 Energy Storage System, Prepackaged Self-contained. Energy storage systems where the energy storage devices such as cells, batteries or modules and controls and any necessary ventilation, illumination, fire suppression or alarm systems are assembled, installed and packaged into a singular energy storage container or unit. Informational Note: Prepackaged and self-contained systems will generally be manufactured by a single entity, tested and listed to safety standards relevant to the system and readily connected on site to the electrical system and in the case of multiple systems to each other Energy Storage System, Pre-engineered of Matched Components. Energy storage systems that are not prepackaged self-contained systems but instead are provided as separate components of a system by a singular entity that are matched and intended to be assembled as an energy storage system at the system installation site. Informational Note: Pre-engineered systems of matched components for field assembly as a system will generally be designed by a single entity and comprised of components that are tested and listed separately or as an assembly to safety standards relevant to the component and readily assembled on site as a system and connected on site to the electrical system. Energy Storage System, Other Systems. Energy storage systems that are not prepackaged or self-contained or pre-engineered systems of matched components but instead are systems composed of individual components that have not been pre-engineered and specifically matched to be assembled as a system. Informational Note: Other systems will generally be comprised of different components secured by an entity such as a system designer, contractor, engineer, utility or building owner. Such components are combined on site to create an energy storage system. Those components would generally be tested and listed to safety standards relevant to the component but the assembly of those components and their associated safety would be determined by the entity creating the system. Flowing Electrolyte Batteries A rechargeable battery that stores its active materials, in the form of liquid aqueous electrolytes, external to the battery such as in pumped electrolyte energy storage systems. The electrolytes, which serve as the energy carriers, are pumped through two half cells separated by an ion-permeable separator, which provides separation of the two Panel 13 FD Agenda page 249

291 electrolytes while still allowing for the passage of ions during charging and discharging. Charging and discharging results in a chemical reduction reaction in one electrolyte and an oxidation reaction in the other electrolyte. Ions selectively pass through the separator membrane to complete the redox reaction. When in use the electrolytes are continuously pumped in a circuit between reactor and storage tanks. Informational Note: Two commercially available flowing electrolyte batteries technologies are the zinc bromine and the vanadium redox flowing electrolyte batteries. Flow Battery. A rechargeable battery, similar to a fuel cell, that stores its active materials in the form of two aqueous electrolytes external to the battery. When in use the electrolytes are continuously pumped in a circuit between reactor and storage tanks. Informational Note: Two commercially available flow battery technologies are zinc bromine and vanadium redox sometimes referred to as pumped electrolyte energy storage systems Intercool Connector. An electrically conductive bar or cable used to connect adjacent cells in a battery. Intertie Connector. An electrical conductor used to connect two cells in a battery on different tiers of the same rack or different shelves of the same rack. Inverter Input Circuit. Conductors between the inverter and the energy storage system in stand-alone and multimode inverter systems. Inverter Output Circuit. Conductors between the inverter and an ac panelboard for energy storage systems or the conductors between the inverter and the equipment being supplied by the system or by another electric power production source, such as a utility for electrical production and distribution network. Nominal Voltage. The value assigned to an energy storage system of a given voltage class for the purpose of convenient designation. The operating voltage of the cell or battery may vary above or below this value. Panel 13 FD Agenda page 250

292 Informational Note: The most common nominal cell voltages in a battery system are 2 volts per cell for lead-acid systems, 1.2 volts per cell for alkali systems, and 3.6 to 3.8 volts per cell for Li-ion systems. Nominal voltages and voltage ranges vary with different chemistries or technologies. Sealed Cell or Battery. A cell or battery that has no provision for the routine addition of water or electrolyte or for external measurement of electrolyte specific gravity. Informational Note: Some cells that are considered to be sealed under conditions of normal use, such as valve-regulated lead-acid or some lithium cells, contain pressure relief valves Storage Battery. A battery comprised of one or more rechargeable cells of the lead-acid, nickelcadmium, or other rechargeable electrochemical types. Terminal. That part of a cell, container, or battery or energy storage system (ESS) to which an external connection is made (commonly identified as post, pillar, pole, or terminal post) Other Articles. Wherever the requirements of other articles of this Code and Article 706 differ, the requirements of Article 706 shall apply. If the energy storage system is capable of being operated in parallel with a primary source(s) of electricity, the requirements in , , and shall apply General Requirements. The requirements of this section are applicable to all energy storage systems. (A) Energy storage systems. Energy storage systems shall be classified as one of types of systems described in (1), (2) or (3). (1) Prepackaged self-contained systems. (2) Pre-engineered systems of matched components intended for field assembly as a system. (3) Systems other than as described in (1) and (2) above. Panel 13 FD Agenda page 251

293 (B) Equipment. Monitors and controls, switches and breakers, power conversion systems, inverters and transformers, energy storage devices and other components of the energy storage system shall be listed for the intended application as a part of an energy storage system. Alternatively, prepackaged self-contained systems shall be permitted to be listed for the intended application as a complete energy storage system. (C) Qualified personnel. The installation of energy storage systems and system components and all associated wiring, interconnections, controls, inverters and other equipment associated with the system shall be performed only by qualified personnel. Informational Note: See Article 100 for the definition of qualified personnel. (D) Multiple inverters. An energy storage system shall be permitted to have multiple inverters. Where the inverters are remotely located from each other, a directory in accordance with shall be installed at each ac and dc disconnecting means serving the energy storage system or its component parts and at the main service disconnecting means showing the location of all ac and dc disconnecting means associated with the energy storage system. (E) DC Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from an energy storage system with a nominal voltage over 100 volts. A disconnecting means shall be readily accessible and located within sight of the system. Informational Note: See (H) for information on the location of the overcurrent device for conductors (1) Remote Actuation. Where controls to activate the disconnecting means of and energy storage system are not located within sight of the system, the disconnecting means shall be capable of being locked in the open position, in accordance with , and the location of the controls shall be field marked on the disconnecting means. (2) Busway. Where a DC busway system is installed, the disconnecting means shall be permitted to be incorporated into the busway. Panel 13 FD Agenda page 252

294 (3) Notification. The disconnecting means shall be legibly marked in the field. A label with the marking shall be placed in a conspicuous location near the energy storage system if a disconnecting means is not provided. The marking shall be of sufficient durability to withstand the environment involved and shall include the following: (1) Nominal energy storage system voltage (2) Arc flash derived from the terminals of the energy storage system (3) Date the calculation was performed Informational Note: NFPA 70E provides guidance for notification of arch flash hazard due to the prospective short circuit current and/or appropriate personal protective equipment (PPE). (F) Connection to other energy sources. (1) Load Disconnect. A load disconnect that has multiple sources of power shall disconnect all energy sources when in the off position. (2) Identified Interactive Equipment. Only inverters and ac modules listed and identified as interactive shall be permitted on interactive systems. (3) Loss of Interactive System Power. An inverter in an interactive energy storage system shall automatically de-energize its output to the connected electrical production and distribution network upon loss of voltage in that system and shall remain in that state until the electrical production and distribution network voltage has been restored. A normally interactive energy storage system shall be permitted to operate as a stand-alone system to supply loads that have been disconnected from electrical production and distribution network sources. (4) Unbalanced Interconnections. Unbalanced connections between an energy storage system and electric power production sources shall be in accordance with (5) Point of Connection. The point of connection between an energy storage system and electric power production sources shall be in accordance with Panel 13 FD Agenda page 253

295 (G) Working space. (1) Between systems or system components. Spaces about the energy storage systems shall comply with Working space shall be measured from the edge of the energy storage system modules, battery cabinets, racks, or trays. For battery racks, there shall be a minimum clearance of 25 mm (1 in.) between a cell container and any wall or structure on the side not requiring access for maintenance. Energy storage system modules, battery cabinets, racks or trays shall be permitted to contact adjacent walls or structures, provided that the battery shelf has a free air space for not less than 90 percent of its length. Prepackaged self-contained energy storage systems shall be permitted to have working space between components within the system in accordance with the manufacturer s recommendations and listing of the system. Informational Note: Additional space is often needed to accommodate energy storage system equipment hoisting equipment, tray removal, or spill containment. (2) Within systems or system components. Where top terminal energy storage systems are installed on tiered racks or on shelves of battery cabinets, working space in accordance with the storage equipment manufacturer s instructions shall be provided between the highest point on a storage system component and the row, shelf or ceiling above that point.. Prepackaged selfcontained energy storage systems shall be permitted to have working space between components within the system in accordance with the manufacturer s recommendations and listing of the system. Informational Note No. 1: The installation instructions of the system component manufacturer typically define how much top working space is necessary for a particular system component. Informational note No. 2: IEEE 1187, provides guidance for top clearance of VRLA batteries, which are the most commonly used battery in cabinets. (H) Illumination. Illumination shall be provided for working spaces associated with energy storage systems and their equipment and components. The lighting outlets shall not be controlled by automatic means only. Additional lighting outlets shall not be required where the work space is illuminated by an adjacent light source. The location of luminaires shall not: Panel 13 FD Agenda page 254

296 (1) Expose personnel to energized system components while performing maintenance on the luminaires in the system space; or (2) Create a hazard to the system or system components upon failure of the luminaire. (I) Ventilation. Provisions appropriate to the energy storage technology shall be made for sufficient diffusion and ventilation of any possible gases within the system and from the system to prevent the accumulation of an explosive mixture. Prepackaged self-contained energy storage systems shall be permitted to be ventilation within the system and from the system in accordance with the manufacturer s recommendations and listing of the system. Informational Note No. 1: See NFPA 1, Fire Code, Chapter 52, for ventilation considerations for specific battery chemistries. Informational Note No. 2: Some storage technologies do not require ventilation. Informational Note No. 3: A source for design of ventilation of battery systems is IEEE Std /ASHRAE Guideline (J) Egress. A personnel door(s) intended for entrance to, and egress from; rooms containing energy storage systems or equipment shall open in the direction of egress and shall be equipped with listed panic hardware. (K) Accessibility. All energy storage systems equipment, monitors, controls and other components shall be readily accessible (L) System markings and building signage. (1) Energy storage system equipment, monitors, controls and other components shall be marked in accordance with A sign shall be placed at the service-entrance equipment that indicates the type and location of on-site optional standby power sources. A sign shall not be required for individual unit equipment for standby illumination. (2) Buildings or structures with both utility service and energy storage systems shall have a permanent plaque or directory providing the location of the service disconnecting means and the energy storage system disconnecting means if not located at the same location. The warning sign(s) or label(s) shall comply with (B). Panel 13 FD Agenda page 255

297 (M) Dwelling Units. (1) Operating voltage. Energy storage systems for dwellings shall be configured so as to operate at a voltage of 100 volts or less.). Exception: Where live parts are not accessible during routine energy storage system maintenance, an energy storage system voltage greater than 100 volts shall be permitted up to the maximum voltage permitted for the connected energy source. (2) Guarding of live parts. Live parts of energy storage systems for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or type. Informational Note: Batteries in energy storage systems can be subject to extensive charge discharge cycles and can therefore require frequent maintenance, such as checking electrolyte and cleaning connections. (N) Current limiting. A listed, current-limiting, overcurrent device shall be installed in each circuit adjacent to the energy storage system where the available short-circuit current from an energy storage device exceeds the interrupting or withstand ratings of other equipment in the circuit, without respect for the voltage of the energy storage system. The installation of current limiting fuses shall be in accordance with (O) Storage system maintenance disconnecting means. Energy storage systems greater than 100 volts shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the electrical system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) from the remainder of any other energy system to which the energy storage system is connected. A non-load-break-rated switch shall be permitted to be used as a disconnecting means. Panel 13 FD Agenda page 256

298 (P) Storage systems of more than 100 volts. When the energy storage system is rated more than 100 volts, nominal, the system shall be permitted to operate with ungrounded conductors, provided the following conditions are met: (1) Any other system to which the storage system is connected is grounded. (2) The dc and ac load circuits are solidly grounded. (3) All main ungrounded energy storage system input/output circuit conductors are provided with switched disconnects and overcurrent protection. (4) A ground-fault detector and indicator is installed to monitor for ground faults within the storage system. (Q) Fuses. Means shall be provided to disconnect any fuses associated with energy storage system equipment and components when the fuse is energized from both directions and is accessible to other than qualified persons. Switches, pullouts, or similar devices that are rated for the application shall be permitted to serve as a means to disconnect fuses from all sources of supply Installation of batteries. Storage batteries associated with an energy storage system shall be installed in accordance with the provisions this Article Wiring from and Equipment Supplied by Energy Storage Systems. Wiring and equipment supplied from energy storage systems and system components shall be subject to the applicable provisions of this Code applying to wiring and equipment operating at the same voltage, unless otherwise permitted by this Article Circuit sizing and current. (A) The maximum current for the specific circuit shall be calculated in accordance with (A)(1) through (4). (1) Nameplate Rated Circuit Current. The nameplate(s) rated circuit current shall be the rated current indicated on the energy storage system nameplate or system listing when the system is a prepackaged self-contained system or is a pre-engineered systems of matched components intended for field assembly as a system. The rated circuit current for other systems shall be determined by the system designer or installer in accordance with acceptable engineering practice. Panel 13 FD Agenda page 257

299 (2) Inverter Output Circuit Current. The maximum current shall be the inverter continuous output current rating. (3) Stand-Alone Inverter Input Circuit Current. The maximum current shall be the standalone continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. [690.8(A)(4)] (4) DC to DC Converter Output Current. The maximum current shall be the dc-to-dc converter continuous output current rating. (B) Conductor Ampacity and Overcurrent Device Ratings. The ampacity of the feeder circuit conductors from the energy storage system(s) to the wiring system serving the loads to be serviced by the system shall not be less than the greater of the (1) nameplate(s) rated circuit current as determined in accordance with 706.8(A) or (2) the rating of the energy storage system(s) overcurrent protective device(s). (C) Ampacity of Grounded or Neutral Conductor. If an interactive single-phase, 2-wire energy storage system output(s) is connected to the grounded or neutral conductor and a single ungrounded conductor of a 3-wire system or of a 3-phase, 4-wire, wye-connected system, the maximum unbalanced neutral load current plus the energy storage system(s) output rating shall not exceed the ampacity of the grounded or neutral conductor. (D) Conductor Ampacity. Conductor ampacities shall be determined in accordance with Overcurrent protection. (A) Circuits and Equipment. Storage battery circuit conductors and equipment shall be protected in accordance with the requirements of Article 240. Protection devices for energy storage system circuits shall be in accordance with the requirements of 706.9(B) through (D). Circuits shall be protected at the source from overcurrent. (B) Overcurrent Device Ratings. Overcurrent protective devices shall be rated in accordance with Article 240 and the rating provided on systems serving the energy storage system shall be not less than 125 percent of the maximum currents calculated in 706.8(B). Panel 13 FD Agenda page 258

300 (C) Direct Current Rating. Overcurrent devices, either fuses or circuit breakers, used in any dc portion of an ESS shall be listed and shall have the appropriate voltage, current and interrupt ratings. (D) Prime Movers. Overcurrent protection shall not be required for conductors from an energy storage system with a nominal voltage of 100 volts or less if the storage system provides power for starting, ignition, or control of prime movers. Section shall not apply to these conductors Charge control. (1) General. Equipment shall be provided to control the charging process of the energy storage system. Charge control shall not be required where the energy storage system has independent, integrated charge control capabilities. In such systems, the maximum voltage of the charging source shall not exceed maximum voltage on nameplate rating of the energy storage system. All adjustable means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain types of energy storage equipment such as valve-regulated lead acid or nickel cadmium can experience thermal failure when overcharged. (2) Diversion charge controller. (1) Sole Means of Regulating Charging. An energy storage system employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging of the storage device. (2) Circuits with Diversion Charge Controller and Diversion Load. Circuits containing a diversion charge controller and a diversion load shall comply with the following: (1) The current rating of the diversion load shall not exceed the current rating of the diversion load charge controller. The voltage rating of the diversion load shall be greater than the maximum energy storage system voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the charging source. Panel 13 FD Agenda page 259

301 (2) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utilityinteractive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (1) and (2): (1) These systems shall not be required to comply with (C)(2)(2). (2) These systems shall have a second, independent means of controlling the energy storage system charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (3) Charge controllers and DC converters. When charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed the ampacity of the conductors in output circuits shall be based on the maximum rated continuous output current of the charge controller or converter for the selected output voltage range, and the voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range Short circuit prevention. Means shall be provided to prevent the creation of a shortcircuit path to ground between the energy storage system cells or modules and any racks or shelves on which or cabinets in which they are installed Guarding of live parts. Guarding of live parts shall comply with II Electrochemical Energy Storage Systems Scope. Part II of this article applies to stationary energy storage systems that are comprised of sealed and non-sealed cells or batteries or system modules that are comprised of multiple sealed cells or batteries. Panel 13 FD Agenda page 260

302 Installation of batteries. Storage batteries associated with an energy storage system shall be installed in accordance with the provisions this Article. (A) Dwelling Units. (1) Operating voltage. Energy storage systems for dwellings shall be configured so as to operate at a voltage of 100 volts, nominal, or less. Exception: Where live parts are not accessible during routine energy storage system maintenance, an energy storage system voltage greater than 100 volts shall be permitted. (2) Guarding of live parts. Live parts of energy storage systems for dwellings shall be guarded to prevent accidental contact by persons or objects, regardless of voltage or type. (B) Storage system nonconductive cases and conductive racks. Flooded, vented lead-acid batteries where operating at more than 50 volts, nominal, shall not use conductive cases or shall not be installed in conductive cases. Conductive racks used to support non-conductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the non-conductive cases. Exception: This requirement shall not apply to any type of valve-regulated lead-acid (VRLA) battery or other types of sealed batteries that may require steel cases for proper operation. (C) Disconnection of Series Battery Circuits. Battery circuits subject to field servicing, where operating at more than 50 volts, nominal, shall have provisions to disconnect the series-connected strings into segments of 50 volts, nominal, or less for maintenance by qualified persons. Non loadbreak bolted or plug-in disconnects shall be permitted. (D) Storage system maintenance disconnecting means. Energy storage systems greater than 50 volts, nominal, shall have a disconnecting means, accessible only to qualified persons, that disconnects the grounded circuit conductor(s) in the electrical storage system for maintenance. This disconnecting means shall not disconnect the grounded circuit conductor(s) for the remainder of any other electrical system. A non-load-breakrated switch shall be permitted to be used as a disconnecting means. (E) Storage systems of more than 100 volts. When the energy storage system is rated more than 50 volts, nominal, the system shall be permitted to operate with ungrounded conductors, provided the following conditions are met: (1) The dc and ac load circuits are solidly grounded. (2) All main ungrounded energy storage system input/output circuit conductors are provided with switched disconnects and overcurrent protection. (3) A ground-fault detector and indicator is installed to monitor for ground faults within the storage system. Panel 13 FD Agenda page 261

303 Battery and cell terminations. (A) Corrosion Prevention. Antioxidant material suitable for the battery connection shall be used when recommended by the battery or cell manufacturer. Informational Note: The battery manufacturer s installation and instruction manual can be used for guidance for acceptable materials. (B) Intercell and Intertier Conductors and Connections. The ampacity of field-assembled intercell and intertier connectors and conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient temperature shall not exceed the safe operating temperature of the conductor insulation or of the material of the conductor supports. Informational Note: Conductors sized to prevent a voltage drop exceeding 3 percent of maximum anticipated load, and where the maximum total voltage drop to the furthest point of connection does not exceed 5 percent, may not be appropriate for all battery applications. IEEE , Guide for the Protection of Stationary Battery Systems, provides guidance for overcurrent protection and associated cable sizing. (C) Battery Terminals. Electrical connections to the battery, and the cable(s) between cells on separate levels or racks, shall not put mechanical strain on the battery terminals. Terminal plates shall be used where practicable. Informational Note: Conductors are commonly pre-stressed. Refer to the manufacturer s instructions for guidance. Fine stranded cables are generally preferred for their flexibility Battery interconnections. Flexible cables, as identified in Article 400, in sizes 2/0 AWG and larger shall be permitted within the battery enclosure from battery terminals to a nearby junction box where they shall be connected to an approved wiring method. Flexible battery cables shall also be permitted between batteries and cells within the battery enclosure. Such cables shall be listed for hard-service use and identified as moisture resistant. Flexible, finestranded cables shall only be used with terminals, lugs, devices, or connectors in accordance with Panel 13 FD Agenda page 262

304 Disconnection of series system circuits. Means shall be provided to prevent energy storage system voltage backfeeding to the rest of the system when maintenance is being performed. Energy storage system circuits greater than 100 volts shall have provisions to disconnect the series-connected strings into segments of 100 volts or less for maintenance by qualified persons. Non-load break bolted or plug-in disconnects shall be permitted Charge control. (A) General. Equipment shall be provided to control the charging process of the energy storage system. Charge control shall not be required where the energy storage system has independent, integrated charge control capabilities. In such systems, the maximum voltage of the charging source shall not exceed maximum voltage on nameplate rating of the energy storage system. All adjustable means for control of the charging process shall be accessible only to qualified persons. Informational Note: Certain types of energy storage equipment such as valve-regulated lead acid or nickel cadmium can experience thermal failure when overcharged. (B) Diversion charge controller. (1) Sole Means of Regulating Charging. An energy storage system employing a diversion charge controller as the sole means of regulating charging shall be equipped with a second independent means to prevent overcharging. (2) Circuits with Direct-Current Diversion Charge Controller and Diversion Load. Circuits containing a dc diversion charge controller and a dc diversion load shall comply with the following: (1) The voltage rating of the diversion load shall be greater than the maximum energy storage system voltage. The power rating of the diversion load shall be at least 150 percent of the power rating of the charging source. (2) The conductor ampacity and the rating of the overcurrent device for this circuit shall be at least 150 percent of the maximum current rating of the diversion charge controller. Panel 13 FD Agenda page 263

305 (3) Energy Storage Systems Using Utility-Interactive Inverters. Systems using utility-interactive inverters to control energy storage state-of-charge by diverting excess power into the utility system shall comply with (1) and (2): (1) These systems shall not be required to comply with (B)(2)(2). (2) These systems shall have a second, independent means of controlling the energy storage system charging process for use when the utility is not present or when the primary charge controller fails or is disabled. (C) Charge controllers and DC converters. When charge controllers and other dc power converters that increase or decrease the output current or output voltage with respect to the input current or input voltage are installed the ampacity of the conductors in output circuits shall be based on the maximum rated continuous output current of the charge controller or converter for the selected output voltage range, and the voltage rating of the output circuits shall be based on the maximum voltage output of the charge controller or converter for the selected output voltage range Ground Fault Protection. Means shall be provided to prevent short circuit paths from the battery to a conductive surface. Informational note 1. One example of a short circuit path would be a leak of electrolyte to a metal rack or shelf. Even a dry and possibly invisible - electrolyte trace can be conductive Informational note 2. Common methods of protection include coating of racks, trays, or shelves with nonconductive and electrolyte-resistant paint, or the use of non-metallic construction such as composite or fiberglass material. Panel 13 FD Agenda page 264

306 Ungrounded Conductors. Battery systems consisting of more than twenty-four 2-volt cells connected in series (more than 48 volts, nominal) serving PV systems shall be permitted to operate with ungrounded conductors, provided the following conditions are met: (1) The photovoltaic array source and output circuits shall comply with (2) the dc and ac load circuits shall be solidly grounded. (3) All main ungrounded battery input/output circuit conductors shall be provided with switched disconnects and overcurrent protection. (4) A ground-fault detector and indicator shall be installed to monitor for ground faults in the battery pack Ungrounded Conductors. Electrochemical energy storage systems operating at more than 100 volts shall be permitted to be installed and operate with ungrounded conductors, provided a ground-fault detector and indicator is installed to monitor ground faults within the system Accessibility. The terminals of all cells or multi-cell units shall be readily accessible for readings, inspection, and cleaning where required by the equipment design. One side of transparent battery containers shall be readily accessible for inspection of the internal components Battery Location. Electrochemical Battery locations shall conform to (A) and (B). (A) Live Parts. Guarding of live parts shall comply with (B) Top Terminal Batteries. Where top terminal electrochemical energy storage devices are installed on tiered racks or on shelves of battery cabinets, working space in accordance with the storage equipment manufacturer s instructions shall be provided between the highest point on a storage system component and the row, shelf or ceiling above that point. Informational Note No. 1: The installation instructions of the system component manufacturer typically define how much top working space is necessary for a particular system component. Informational note No. 2: IEEE 1187, provides guidance for top clearance of VRLA batteries, which are the most commonly used battery in cabinets. Panel 13 FD Agenda page 265

307 Vents. (A) Vented Cells. Each vented cell shall be equipped with a flame arrester. Informational Note: A flame arrested is designed to prevent destruction of the cell due to ignition of gases within the cell by an external spark or flame under normal operating conditions. (B) Sealed Cells. Sealed battery or cells shall be permitted to be equipped with a pressurerelease vent to prevent excessive accumulation of gas pressure Nonconductive cases and conductive racks. Flooded, vented, batteries with more than twenty-four 2-volt cells connected in series (48 volts, nominal) serving as a component of an energy storage system shall not use nor be installed in conductive cases. Conductive racks used to support non-conductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the topes of the non-conductive cases. Exception: This requirement shall not apply to any type of valve-regulated lead-acid battery or other type of sealed battery serving as a component of an energy storage system that may require steel cases for proper operation Storage system nonconductive cases and conductive racks. Flooded, vented, batteries operating a greater than 50 volts nominal, and serving as a component of an energy storage system shall not use nor be installed in conductive cases. Conductive racks used to support non-conductive cases shall be permitted where no rack material is located within 150 mm (6 in.) of the tops of the non-conductive cases. Exception: This requirement shall not apply to any type of valve-regulated lead-acid (VRLA) battery or any other types of sealed batteries that may require steel cases for proper operation Gas piping. Gas piping shall not be permitted in rooms or spaces containing electro chemical energy storage systems or equipment. Panel 13 FD Agenda page 266

308 III Flowing Electrolyte Energy Storage Systems Scope. The provisions of this section apply to energy storage systems composed of or containing flowing electrolyte batteries. (A) General. All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of this code. The system and system components shall also meet the provisions of parts I and II of this article. (B) Electrolyte Classification. The flowing electrolyte(s) that are acceptable for use in the batteries associated with the energy storage system shall be identified by name and chemical composition. Such identification shall be provided by readily discernable signage adjacent to every location in the system where the electrolyte can be put into or taken out of the system. (C) Electrolyte Containment. Flowing electrolyte battery systems shall be provided with a means for electrolyte containment to prevent spills of electrolyte from the system. An alarm system is to be provided to signal an electrolyte leaks from the system. Electrical wiring and connections shall be located and routed in a manner that mitigates the potential for exposure to electrolytes. [LBF suggested text] (D) Flow controls. Controls are to shut down the system in the event of electrolyte blockage such as a malfunctioning electrolyte pump or valve. (E) Pumps and other fluid handling equipment. Pumps and other fluid handling equipment are to be rated/specified suitable for exposure to the electrolytes. IV Kinetic Energy Storage Systems Scope. The provisions of this section apply to energy storage systems composed of or containing kinetic devices intended to store energy mechanically and when there is a demand for electrical power to use the stored energy to generate the needed power. (A) General. All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of this code. Panel 13 FD Agenda page 267

309 Informational Note: The energy storage device itself can be considered similar to a generator as covered in Article 445, with respect to the inputs to and outputs from the system. V Compressed Air Energy Storage Systems Scope. The provisions of this section apply to energy storage systems composed of or containing devices intended to store energy through the compression of gases and when there is a demand for electrical power to use the stored energy to generate the needed power. (A) General. All electrical connections to and from the system and system components shall be in accordance with the applicable provisions of this code. Informational Note: The energy storage device itself can be considered similar to a generator as covered in Article 445, with respect to the inputs to and outputs from the system. Panel 13 FD Agenda page 268

310 Substantiation to accompany the final Article 706 submittal dated Note 1: This document applies to the clean copy of the draft article. Note 2: Commentary is not provided on all clauses. This public input was developed by the NEC DC Task Force (TF) of the Technical Correlating Committee. The Task Force is chaired by John R. Kovacik, UL LLC. The participants in the task force and their employers/associations are listed in a separate document which is on file with NFPA. Currently batteries are addressed in numerous places in the NEC such as Articles 480 and 690, which has been appropriate over time with the former article historically covering lead-acid batteries and the latter recently added to address the application of batteries in general, not just lead acid, to PV systems. The current state of energy storage technology, which includes batteries, and anticipated evolution of energy storage supports the need for a singular set of requirements in the NEC covering such systems. If this is not accomplished in the 2017 NEC and available to serve as a singular foundation for needed changes in the future, the provisions covering such systems will continue to reside in different places within the NEC and likely evolve to attach themselves as parts to existing criteria throughout the NEC. To foster the safe application of energy storage systems and facilitate the application and use of the NEC by technology proponents as well as those who install and inspect such systems there should be a singular article in the NEC on energy storage systems. As covered in the DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA the portfolio of electricity storage technologies can be considered for providing a range of services to the electric grid and can be positioned around their power and energy relationship. This relationship is illustrated in the figure below. The comparisons are very general, intended for conceptual purposes only; many of the storage options have broader duration and power ranges than shown. Panel 13 FD Agenda page 269

311 The range of energy storage technologies and their continuing evolution supports the need for a singular place in the NEC to address the safety of all these systems; safety as it relates to issues relevant to all technologies as well as those issues unique to only one technology. The following provides the information needed to understand each of the sections and subsections in the proposed Article 706, much of which has been derived from existing NEC text. In addition, in composing this new article the NEC TC TF coordinated with a number of other groups and committees developing changes to relevant provisions in the NEC to ensure that the proposed Article 706 in being based on provisions in the 2014 NEC was consistent with those same provisions as they would appear in the 2017 NEC should those proposals to other relevant sections of the NEC be approved The scope of the current NEC provisions for storage batteries is covered in of the 2014 NEC. The provisions in have been copied and included in a new Article 706 covering energy storage systems or which batteries are one type. This new Article 706 is intended to place any and all battery requirements in the NEC in one place, have the new article cover what is currently in Article 480 and allow that article to be removed or simply refer to Article 706. One editorial change has been suggested at the beginning of the text in which is shown in the new article as In addition a minimum limitation of energy storage size has been included because Systems below that limit would Informational note 1 has been added to clarify that voltage and power ratings for pre-packaged and self-contained systems are available on the nameplate data. Informational note 2 is currently informational note 1 to and has been updated to include references to three new documents relevant to energy storage systems (items 9 to 11). Panel 13 FD Agenda page 270