Second Revision No. 25-NFPA 79-2013 [ Section No. 1.1.1 ] 1.1.1 The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems of industrial machines operating from a nominal voltage of 600 volts or less, and commencing at the point of connection of the supply circuit conductors to the electrical equipment of the machine. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Wed Jul 10 10:28:54 EDT 2013 Committee The TC understands document scopes are the jurisdiction of the NEC CC and offers Statement: a revision of the paragraph in the interest of clarifying the scope of NFPA 79. Revising the paragraph as offered will align the text of this section with existing requirements in the Standard such as the main disconnecting means requirements in Chapter 5 and with the new text relative to working spaces in 11.5. Using common terminology will assist readers of NFPA 79 with understanding where the Standard starts. submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/64
Second Revision No. 57-NFPA 79-2013 [ Section No. 2.4 ] 2.4 References for Extracts in Mandatory Sections. NFPA 70, National Electrical Code, 2011 2014 edition. NFPA 70E, Standard for Electrical Safety in the Workplace, 2012 2015 edition. Submitter Full Name: Jenny Depew Organization: NFPA Submittal Date: Mon Aug 26 11:29:56 EDT 2013 : Update the revision dates of NFPA referenced documents submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/64
Second Revision No. 47-NFPA 79-2013 [ Section No. 3.3.5 ] 3.3.5* Adjustable Speed Drive. A combination of the power converter, motor, and motor mounted auxiliary devices such as encoders, tachometers, thermal switches and detectors, air blowers, heaters, and vibration sensors. [ 70: 430.2] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 11:59:11 EDT 2013 Committee Statement: Citation was deleted to reflect the removal of the definition from NEC 2014 submittals.nfpa.org/terraviewweb/viewerpage.jsp 3/64
Second Revision No. 42-NFPA 79-2013 [ Section No. 3.3.16 ] 3.3.16* Cable Trunking System. A system of enclosures comprised of a base and a removable cover intended for the complete surrounding of insulated conductors, cables, and cords. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:50:43 EDT 2013 Committee Statement: Delete the term "Cable Trunking" from the definitions and move to Annex J. submittals.nfpa.org/terraviewweb/viewerpage.jsp 4/64
Second Revision No. 48-NFPA 79-2013 [ Section No. 3.3.20.4 ] 3.3.19.4* Liquidtight Flexible Nonmetallic Conduit (LFNC). A raceway of circular cross section of various types as follows: (1) A smooth seamless inner core and cover bonded together and having one or more reinforcement layers between the core and covers, designated as Type LFNC-A; (2) A smooth inner surface with integral reinforcement within the conduit raceway wall, designated as Type LFNC-B; (3) A corrugated internal and external surface without integral reinforcement within the conduit wall, designated as LFNC-C. LFNC is flame resistant and with fittings and is approved for the installation of electrical conductors. [70:356.2] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 12:02:31 EDT 2013 Committee Statement: Conduit was changed to raceway and the last sentence was removed to match the definition in NEC 2014. submittals.nfpa.org/terraviewweb/viewerpage.jsp 5/64
Second Revision No. 49-NFPA 79-2013 [ Section No. 3.3.29 ] 3.3.28 Device. A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function. [70:100] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 12:26:13 EDT 2013 : Changed definition to match NEC 2014. submittals.nfpa.org/terraviewweb/viewerpage.jsp 6/64
Second Revision No. 44-NFPA 79-2013 [ Section No. 3.3.33 ] 3.3.33* Duct. An enclosed channel designed expressly for holding and protecting electrical conductors, cables, and busbars. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 12:44:39 EDT 2013 Committee Delete the term "Duct" because it is no longer used in the standard. Relocate the Statement: term to Annex J to help users understand the "Cross Reference" between the NEC/79 terms and IEC/EN terms. submittals.nfpa.org/terraviewweb/viewerpage.jsp 7/64
Second Revision No. 50-NFPA 79-2013 [ Section No. 3.3.42 ] 3.3.40 Exposed (as applied to live parts). Capable of being inadvertently touched or approached nearer than a safe distance by a person. It is applied to parts not suitably guarded, isolated, or insulated. [ 70: 100] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 12:43:49 EDT 2013 Committee The following sentence is now an informational note in 2014 edition of NFPA 70: "It Statement: is applied to parts not suitably guarded, isolated, or insulated." This is a major change and NFPA 79 does not contain informational notes. The 79 TC will have to make this change in the next edition. The citation to NEC was removed because the definitions do not match. submittals.nfpa.org/terraviewweb/viewerpage.jsp 8/64
Second Revision No. 51-NFPA 79-2013 [ Section No. 3.3.50 ] 3.3.48 Grounding Conductor, Equipment. (EGC) The conductive path(s) installed to connect that provides a ground-fault current path and connects normally non current-carrying metalparts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both. [70:100] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 13:14:44 EDT 2013 : The definition was changed to match the NEC 2014. submittals.nfpa.org/terraviewweb/viewerpage.jsp 9/64
Second Revision No. 5-NFPA 79-2013 [ Section No. 3.3.55 ] 3.3.53 Industrial Control Panel. An assembly of two or more components consisting of one of the following: (1) power circuit components only, such as motor controllers, overload relays, fused disconnect switches, and circuit breakers; or (2) control circuit components only, such as pushbuttons, pilot lights, selector switches, timers, switches, and control relays; or (3) a combination of power and control circuit components. These components, with associated wiring and terminals, are mounted on, or contained within, an enclosure or mounted on a subpanel. The industrial control panel does not include the controlled equipment. [ 70: 409] Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Mon Jul 08 15:25:00 EDT 2013 Committee The bracketed reference was added to reflect that the definition is extracted from Statement: the NEC. This is part of the effort to standardize definitions throughout the NFPA system by the Glossary Of Terms (GOT) committee. SR was edited to reflect the NEC 2014 definition. Public Comment No. 8-NFPA 79-2013 [Section No. 3.3.55] submittals.nfpa.org/terraviewweb/viewerpage.jsp 10/64
Second Revision No. 52-NFPA 79-2013 [ Section No. 3.3.56 ] 3.3.54 Industrial Machinery (Machine). A power-driven machine (or a group of machines working together in a coordinated manner), not portable by hand while working, that is used to process material by cutting; forming; pressure; electrical, thermal, or optical techniques; lamination; or a combination of these processes. Machine It can include associated equipment used to transfer material or tooling, including fixtures, to assemble/disassemble, to inspect or test, or to package. [The associated electrical equipment, including the logic controller(s) and associated software or logic together with the machine actuators and sensors, are considered as part of the industrial machine.] [70:670.2] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 14:19:13 EDT 2013 Committee Statement: In 2014 edition, 2nd sentence begins It can include, not Machine can include Changed to match since it is an extracted definition submittals.nfpa.org/terraviewweb/viewerpage.jsp 11/64
Second Revision No. 53-NFPA 79-2013 [ Section No. 3.3.61 ] 3.3.59 In Sight From (Within Sight From, Within Sight). Where this standard specifies that one equipment shall be in sight from, within sight from, or within sight of, and so forth, of another equipment, the specified equipment is to be visible and not more than 15 m (50 ft) distant from the other. [70:100] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 14:24:11 EDT 2013 Committee Statement: In NEC 2014 edition, 1st sentence, within sight is within sight of. Changed to match since it is an extracted definition. submittals.nfpa.org/terraviewweb/viewerpage.jsp 12/64
Second Revision No. 6-NFPA 79-2013 [ Section No. 3.3.72 ] 3.3.70 Overcurrent Protective Device, Branch-Circuit. A device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of overcurrents between its rated current and its interrupting rating. Branch-circuit overcurrent protective Such devices are provided with interrupting ratings appropriate for the intended use but no less than 5000 amperes. [ 70: 100] Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Mon Jul 08 15:43:55 EDT 2013 Committee The proposed change puts the definition in line with the proposed action by NEC Statement: CMP 10 for the 2014 edition of the NEC. This is in section 100 of the NEC. The comment is in line with creating consistency in NFPA definitions, as is recommended by NFPA Standards Council for the GOT committee, FR-15, PI 115, this definition is extracted from the 2014 NEC, and was accepted at the ROC stage. Public Comment No. 9-NFPA 79-2013 [Section No. 3.3.72] submittals.nfpa.org/terraviewweb/viewerpage.jsp 13/64
Second Revision No. 54-NFPA 79-2013 [ Section No. 3.3.92 ] 3.3.90* Short-Circuit Current Rating (SCCR). The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria. [70:100] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 14:29:07 EDT 2013 Committee Statement: (SCCR) does not appear in the 2014 edition of NFPA 70. Changed to match NEC 2014 because it is an extracted definition. submittals.nfpa.org/terraviewweb/viewerpage.jsp 14/64
Second Revision No. 55-NFPA 79-2013 [ Section No. 3.3.101 ] 3.3.99 System Isolation Equipment. A redundantly monitored, remotely operated contactor-isolation contactor-isolating system, packaged to provide the disconnecting/isolation function, capable of verifiable operation from multiple remote locations by means of lockout switches, each having the capability of being padlocked in the OFF off (open) position. [70:430.2] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 14:31:26 EDT 2013 Committee Statement: contactor-isolation is contactor-isolating in the NEC 2014 edition. OFF is off in 2014 edition. Change to match because it is an extracted definition. submittals.nfpa.org/terraviewweb/viewerpage.jsp 15/64
Second Revision No. 7-NFPA 79-2013 [ Section No. 5.3.1.1 ] 5.3.1.1 A supply circuit disconnecting means shall be provided for the following: (1) Each incoming supply circuit to a machine Global SR-7 Hide Deleted (2) The supply circuit to a feeder system using collector wires, collector bars, slip-ring assemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines (3) Each on-board power source (e.g., generators, uninterruptible power supplies) Exception: Communication, remote control, and signaling circuits of less than 50 volts shall not be required to be provided with a supply circuit disconnecting means. 5.3.1.1.1* Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment it disconnects. 5.3.1.1.2 Where a machine is supplied by more than one supply circuit, a marking shall be installed at each supply circuit disconnect location denoting the location of all other supply circuit disconnects. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 08:35:29 EDT 2013 Committee It is not necessary or practical to include a disconnecting means for limited energy Statement: circuits. This comment is submitted based on the committee statement on PI 81. See Article 725 and 800 in the NEC for an explanation of remote control and communication circuits respectively. Public Comment No. 43-NFPA 79-2013 [Section No. 5.3.1.1] submittals.nfpa.org/terraviewweb/viewerpage.jsp 16/64
Second Revision No. 8-NFPA 79-2013 [ Section No. 5.3.1.3 ] 5.3.1.3 The Each supply circuit disconnecting means other than attachment plugs and receptacles shall be mounted within the control enclosure or immediately adjacent thereto. Exception No. 1: Externally mounted supply circuit disconnecting means, whether interlock ed or not interlock ed with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to be mounted up to 6 m (20 ft) away from the enclosure, providing that provided the disconnecting means is in sight from and readily accessible to the operator. Exception No. 2: A supply circuit disconnecting means mounted in a separate enclosure and interlock ed in accordance with 6.2.4 6.2.3 with the control enclosure(s) it supplies shall be permitted to be mounted up to 6 m (20 ft) away, providing that provided the disconnecting means is in sight from the control enclosure(s) and readily accessible to the operator. The control enclosure(s) shall be mark ed indicating the location of the disconnecting means. The disconnecting means shall be mark ed indicating the industrial machine it supplies. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 09:11:24 EDT 2013 Committee The exception was added at the first draft meeting prior to the relocation of the Statement: interlocking requirements from 6.2.3 to 6.2.4. The proposed change coordinates that action with the new exception. The committee changed the word "the" to "each" to clarify it would apply to each supply circuit disconnecting means. Public Comment No. 11-NFPA 79-2013 [Section No. 5.3.1.3] Public Comment No. 24-NFPA 79-2013 [Sections 5.3.1.3, 5.3.1.4] submittals.nfpa.org/terraviewweb/viewerpage.jsp 17/64
Second Revision No. 9-NFPA 79-2013 [ Section No. 5.3.1.4 ] 5.3.1.4 Each supply circuit disconnecting means mounted within or adjacent to the control enclosure shall be interlocked with the control enclosure in accordance with 6.2.4. Where the supply circuit disconnecting means is not adjacent to the control enclosure, or where the supply disconnecting means is an attachment plug and receptacle, the control enclosure shall comply with 6.2.5 and a safety sign shall be provided in accordance with Section 16.2. Exception: Where a supply circuit disconnecting means, supplying machines totaling 2 hp or less is not located within or adjacent to the control enclosure it supplies, the control enclosure shall comply with 6.2.4 or 6.2.5. Where a supply disconnecting means is an attachment plug and receptacle, the control enclosure it supplies shall comply with 6.2.5. Where 6.2.5 is used, a safety sign shall be provided in accordance with 16.2. Supplemental Information File Name SR-9_new_5.3.1.4.1373379951893.docx Description Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 09:18:15 EDT 2013 Committee The additional language in the exception to 5.3.1.4 clarifies the intent of 5.3.1.3 that Statement: only separately mounted disconnects for small machines totaling 2 hp or less are not required to be interlocked with the control enclosures in accordance with 6.2.4. The second sentence was changed to an exception to clarify where interlocking is permitted. submittals.nfpa.org/terraviewweb/viewerpage.jsp 18/64
Second Revision No. 36-NFPA 79-2013 [ Section No. 5.3.3.2 ] 5.3.3.2* When the supply circuit disconnecting device is an attachment plug and receptacle (plug/socket combination), it shall fulfill all of the following requirements: (1) Have a load-break rating or be interlocked with a switching device that is load-break rated, and complies with 5.3.3.1(6). Attachment An attachment plug and receptacle (plug/socket combination) rated greater than 20 A amperes or 2 hp shall be listed as a switch-rated plug and receptacle (plug/socket combination). (2) Be of such a type and be so installed as to prevent unintended contact with live parts at any time, even during insertion or removal of the connectors. (3) Have a first-make, last-break electrical grounding (protective) (earthing) contact. (4) Have a retaining means to prevent unintended or accidental disconnection where rated at more than 20 A amperes. (5) Be located within sight from the operator station and be readily accessible. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:27:13 EDT 2013 Committee During the first Revision only parenthetical (protective bonding) and other (grounding) Statement: terms were deleted missed parenthetical terms (Earth/Earthing) and (Protective). The TC agrees that (Earth/Earthing) and (Protective) parenthetical terms be removed for clarity. submittals.nfpa.org/terraviewweb/viewerpage.jsp 19/64
Second Revision No. 10-NFPA 79-2013 [ Section No. 6.2.4.2 ] 6.2.4.2 The interlocking means shall meet the following requirements: (1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock (2) Be reactivated automatically when the door(s) is closed (3) Prevent closing of the disconnecting means while the enclosure door door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 11:09:34 EDT 2013 Committee With the new permission to allow separately mounted disconnects for machinery in Statement: 5.3.1.3 (FR45), the proposed change clarifies that this portion of the interlock requirements is mandated only for the enclosure containing the disconnect itself. Public Comment No. 25-NFPA 79-2013 [Section No. 6.2.4.2] submittals.nfpa.org/terraviewweb/viewerpage.jsp 20/64
Second Revision No. 56-NFPA 79-2013 [ Section No. 6.5.3.2 ] 6.5.3.2 Means of Discharge. The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitor bank, or provided with automatic means of connecting it to the terminals of the capacitor bank up on removal of voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used. [70:460.6(B)] Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Mon Aug 12 14:38:48 EDT 2013 Committee Statement: upon is on in the NEC 2014 edition. Changed to match because it is a extracted definition. submittals.nfpa.org/terraviewweb/viewerpage.jsp 21/64
Second Revision No. 41-NFPA 79-2013 [ Section No. 7.2.5 ] 7.2.5 Receptacle (Socket) Outlets and Their Associated Conductors for Accessory Circuits. 7.2.5.1 Overcurrent protection shall be provided for the circuits feeding general purpose receptacle (socket) outlets intended primarily for supplying power to maintenance equipment. 7.2.5.2 Overcurrent protective devices shall be provided in the ungrounded phase conductors of each circuit feeding receptacle (socket) outlets. Overcurrent protection for these receptacle (socket) outlets shall not exceed 15 amperes. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:46:33 EDT 2013 Committee During the first Revision only parenthetical (protective bonding) and other (grounding) Statement: terms were deleted missed parenthetical term (Socket). The TC agrees that (Socket) parenthetical term be removed for clarity. Second Revision No. 31-NFPA 79-2013 [ Section No. 7.2.10.1 [Excluding any Sub-Sections] ] Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table 7.2.10.1. Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller Full-Load Current (%) submittals.nfpa.org/terraviewweb/viewerpage.jsp 22/64
Fuse Class with Non Time Delay Full-Load Current (%) AC-2 AC-3 AC-4 R 300 300 300 CF or J 300 300 300 CC 300 300 300 T 300 300 300 Type 2 of Application 2 Fuse Class with Time Delay 1 AC-2 AC-3 AC-4 RK-5 3 150 175 175 RK-1 150 175 175 CF or J 150 175 225 CC 150 300 300 Instantaneous trip circuit breaker 4 800 800 800 Inverse trip circuit breaker 5 150 250 250 Note: Where the values determined by Table 7.2.10.1 this table do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possible setting shall be permitted. 1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non time-delay Class CC, J, CF, or T fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current. 2 Types of starting duty are as follows: (a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off. (b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operations per 10 minutes and all wye-delta and two-step autotransformer starting motors. (c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging. 3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers. 4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following: (a) They are adjustable. (b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor. (c) The combination is especially identified for use. (d) It is installed per any instructions included in its listing or labeling. (e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer's recommendation, but not greater submittals.nfpa.org/terraviewweb/viewerpage.jsp 23/64
than 1300 percent of the motor full-load current. 5 Where the rating of an inverse time circuit breaker specified in Table 7.2.10.1 this table is not sufficient for the starting current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes. Exception: Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70, shall be observed for Design B energy efficient motor circuits. Supplemental Information File Name Table_7.2.10.1_with_legislative_changes.docx Description Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Wed Jul 10 12:52:04 EDT 2013 Committee This revision adds Class CF fuses to the permitted fuse types listed since Class CF Statement: fuses have the same performance requirements as Class J fuses. The table with changes shown in legislative text is attached. submittals.nfpa.org/terraviewweb/viewerpage.jsp 24/64
Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table 7.2.10.1. Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller Fuse Class with Non Time Delay Full-Load Current (%) AC-2 AC-3 AC-4 R 300 300 300 CF or J 300 300 300 CC 300 300 300 T 300 300 300 Type 2 of Application 2 Fuse Class with Time Delay 1 AC-2 AC-3 AC-4 RK-5 3 150 175 175 RK-1 150 175 175 CF or J 150 175 225 CC 150 300 300 Instantaneous trip circuit breaker 4 800 800 800 Inverse trip circuit breaker 5 150 250 250 Note: Where the values determined by Table 7.2.10.1 do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possible setting shall be permitted. 1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non time-delay Class CC, J, CF or T fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current. 2 Types of starting duty are as follows:?(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.?(b) AC-3: All medium starting duty motors, including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operations per 10 minutes, and all wye-delta and two-step autotransformer starting motors.?(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging. 3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers. 4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following:?(a) They are adjustable.?(b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor.?(c) The combination is especially identified for use.?(d) It is installed per any instructions included in its listing or labeling.
?(e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-load current. 5 Where the rating of an inverse time circuit breaker specified in Table 7.2.10.1 is not sufficient for the starting current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes. Exception: Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70, shall be observed for Design B energy efficient motor circuits
Second Revision No. 2-NFPA 79-2013 [ Section No. 7.2.10.3 ] 7.2.10.3 Where the branch-circuit short-circuit and ground-fault protective device is selected not to exceed that allowed by 7.2.10.1 for the smallest rated motor, two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where it can be determined that the branch-circuit short-circuit and ground-fault protective device will not open under severe normal conditions of service that might be encountered. The short-circuit and ground-fault protection is shall be provided by a single inverse time circuit breaker or single set of fuses. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Mon Jul 08 14:10:11 EDT 2013 Committee Statement: Replacing "is" with "shall be" aligns with the manual of style for normative text. Public Comment No. 27-NFPA 79-2013 [Section No. 7.2.10.3] submittals.nfpa.org/terraviewweb/viewerpage.jsp 25/64
Second Revision No. 11-NFPA 79-2013 [ Section No. 7.8.3 ] 7.8.3 Equipment Protection. Where provided, SPDs shall be connected across the terminals of all equipment requiring such protection. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 11:21:20 EDT 2013 Committee Surge Protection Devices are installed by choice and the designer or installer Statement: should be permitted to decide where to connect them in accordance with the manufacturers instructions. Public Comment No. 47-NFPA 79-2013 [Section No. 7.8.3] submittals.nfpa.org/terraviewweb/viewerpage.jsp 26/64
Second Revision No. 28-NFPA 79-2013 [ Section No. 8.2.2.1 ] 8.2.2.1 Conductors used for grounding and bonding purposes shall be copper. Stipulations on stranding and flexing as outlined in Chapter 12 shall apply. Exception: Machine members or structural parts of the electrical equipment shall be permitted to be used in the equipment grounding circuit provided that the crosssectional area of these parts provide the same or better conductivity as the minimum cross-sectional area of the copper conductor required. The cross sectional area shall be in accordance with one or more of the following: Steel 10 times that of copper Iron 6 times that of copper Aluminum 2 times that of copper Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Wed Jul 10 11:37:11 EDT 2013 Committee Statement: The machine members and structural parts are not suitable for use as an equipment grounding conductor in all cases or over the life of the equipment. submittals.nfpa.org/terraviewweb/viewerpage.jsp 27/64
Second Revision No. 37-NFPA 79-2013 [ Section No. 8.3.2 ] 8.3.2 Ungrounded control circuits shall be provided with an insulation-monitoring device that either indicates a ground (earth) fault or interrupts the circuit automatically after a ground (earth) fault. Exception: Class 2 low-voltage circuits in Article 725 of NFPA 70, shall not require insulation monitoring. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:33:14 EDT 2013 Committee During the first Revision only parenthetical (protective bonding) and other (grounding) Statement: terms were deleted missed parenthetical terms (Earth/Earthing) and (Protective). The TC agrees that (Earth/Earthing) and (Protective) parenthetical terms be removed for clarity. submittals.nfpa.org/terraviewweb/viewerpage.jsp 28/64
Second Revision No. 38-NFPA 79-2013 [ Section No. 9.4.2 ] 9.4.2 Protection Against Unintended Operation Due to Ground (Earth) Faults and Voltage Interruptions. 9.4.2.1 Ground (Earth) Faults. Ground (earth) faults on any control circuit shall not cause unintentional starting or potentially hazardous motions, or prevent stopping of the machine. Grounded control circuits shall be in accordance with Section 8.2 and Section 8.3. Ungrounded control circuits shall be provided with an insulation monitoring device that either indicates a ground (earth) fault or interrupts the circuit automatically after a ground (earth) fault. A restart of the machine with a detected ground (earth) fault shall be prevented. 9.4.2.2 Voltage Interruptions. 9.4.2.2.1 The requirements detailed in Section 7.5 shall apply. 9.4.2.2.2 Where a memory is used, its functioning in the event of power failure shall be ensured (e.g., by using a nonvolatile memory) where such loss of memory results in a hazardous condition. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:38:53 EDT 2013 Committee During the first Revision only parenthetical (protective bonding) and other (grounding) Statement: terms were deleted missed parenthetical terms (Earth/Earthing) and (Protective). The TC agrees that (Earth/Earthing) and (Protective) parenthetical terms be removed for clarity. submittals.nfpa.org/terraviewweb/viewerpage.jsp 29/64
Second Revision No. 14-NFPA 79-2013 [ Section No. 11.3.2 ] 11.3.2 Enclosures of control equipment shall provide the degree of protection required for the environment. A minimum degree of protection of at least NEMA Type 1 is required. Exception: Where removable collectors on collector wire or collector bar systems are used and NEMA Type 1 enclosures are not practicable, suitable protection shall be provided (e.g., elevation, guarding). Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Tue Jul 09 14:34:12 EDT 2013 Committee Statement: The term "Type" is what is commonly used to refer to the degree of protection for enclosures. Public Comment No. 42-NFPA 79-2013 [Section No. 11.3.2] submittals.nfpa.org/terraviewweb/viewerpage.jsp 30/64
Second Revision No. 22-NFPA 79-2013 [ Section No. 11.5 [Excluding any Sub-Sections] ] Access and working space for control cabinets and compartments operating at 600 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized shall comply with the provisions of Chapter 11. Sufficient access and working space shall be provided and maintained around all control cabinets and compartments to permit ready and safe operation and maintenance of such control cabinets and compartments. Working space for cabinets and compartments that contain supply conductors to industrial machinery that are covered by Article 670 of NFPA 70 shall be in accordance with the NEC. Supplemental Information File Name 79_Figure_11-5_draft7_.1373463184710.docx Add_new_figure_A_11.5_figure_text.1375103558926.docx Description Annex A.11.5 figure Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Wed Jul 10 08:56:18 EDT 2013 Committee This change correlates the NFPA 79 requirements with the Informational Note to Statement: 670.1 in the NEC. The terms cabinets and compartments are used to be consistent with the terminology within the document. An (*) was added to point to the newly added annex A material. Annex A.11.5 Figure and text are attached This addresses the directive of the CC note 1 to reconsider the actions on PI 94. Public Comment No. 12-NFPA 79-2013 [Section No. 11.5 [Excluding any Sub-Sections]] Public Comment No. 49-NFPA 79-2013 [Section No. 11.5 [Excluding any Sub-Sections]] submittals.nfpa.org/terraviewweb/viewerpage.jsp 31/64
FIGURE A.11.5 Clarification of Working Space Requirements at the Termination Location of Incoming Supply Conductors Integral Disconnecting Means Example Applicable Working Space Requirements Externally Mounted Disconnecting Means Example Source Busway, Panelboard, Switchboards or Similar Distribution NEC Article 110, Part II Working Space Requirements Source Busway, Panelboard, Switchboards or Similar Distribution Termination of Supply Conductors Integral to the Industrial Machine Control Panel or Compartment (5.3.1.3 Disconnecting Means) NEC Article 110, Part II Working Space Requirements Termination of Supply Conductors Externally Mounted Supply Circuit Disconnecting Means (5.3.1.3 Exception No. 1 & 2) Additional Industrial Machine Control Panel or Compartment (optional) NFPA 79, Chapter 11 Working Space Requirements Industrial Machine Control Panel or Compartment NFPA 79, Chapter 11 Working Space Requirements Additional Industrial Machine Control Panel or Compartment (optional)
A.11.5 Clarification of Working Space Requirements at the Termination Location of Incoming Supply Conductors Formatted: Font: Bold Formatted: Font: Bold Formatted: Font: Bold Formatted: Font: Bold Figure A.11.5 identifies the requirements for determining the working spaces for about electrical equipment associated with industrial machinery. The left side of Figure A.11.5 depicts a situation where the incoming supply circuit disconnecting means, required by 5.3.1.1, is located in the industrial machine control panel or compartment. The right side of Figure A.11.5 depicts a situation where the incoming supply circuit disconnecting means, required by 5.3.1.1, is externally mounted to the industrial machine control cabinet or the compartment it supplies.
Second Revision No. 24-NFPA 79-2013 [ Section No. 11.5.1.2 ] 11.5.1.2 The width of the working space in front of control cabinets and compartments shall be the width of the opening into the control cabinet or compartment, or 762 mm (30 in.), whichever is greater. Where control equipment or devices are mounted on or through the fixed area around the opening into the control cabinet or compartment, the width of the working space in front of the control cabinet or compartment shall include the width of the fixed area containing the control equipment and devices. Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Wed Jul 10 10:03:53 EDT 2013 Committee The added language clarifies that the working space includes the width of control Statement: equipment or devices mounted to or through the fixed area(s) or flanges of the control cabinet or compartment allowing safer servicing, maintenance and normal operating conditions. Public Comment No. 10-NFPA 79-2013 [Section No. 11.5.1.2] Second Revision No. 4-NFPA 79-2013 [ Section No. 12.5.1 ] 12.5.1 submittals.nfpa.org/terraviewweb/viewerpage.jsp 32/64
Second Revision No. 4-NFPA 79-2013 [ Section No. 12.5.1 ] 12.5.1 The ampacities of conductors shall not exceed the corresponding temperature values given in Table 12.5.1 before any correction factors for ambient temperature or adjustment factors for the number of current-carrying conductors have been applied. Table 12.5.1 Conductor Ampacity Based on Copper Conductors with 60 C (140 F), 75 C (167 F), and 90 C (194 F) Insulation in an Ambient Temperature of 30 C (86 F) Conductor Size (AWG) Ampacity 60 C (140 F) 75 C (167 F) 90 C (194 F) 30 0.5 0.5 28 0.8 0.8 26 1 1 24 2 2 2 22 3 3 3 20 5 5 5 18 7 7 14 16 10 10 18 14 20 20 25 12 25 25 30 10 30 35 40 8 40 50 55 6 55 65 75 4 70 85 95 3 85 100 110 2 95 115 130 1 110 130 150 1/0 125 150 170 2/0 145 175 195 3/0 165 200 225 4/0 195 230 260 250 215 255 290 300 240 285 320 350 260 310 350 400 280 335 380 500 320 380 430 600 355 420 475 700 385 460 520 750 400 475 535 800 410 490 555 900 435 520 585 submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/2
Notes: 900 435 520 585 1000 455 545 615 (1) Wire types listed in 12.3.1 shall be permitted to be used at the ampacities listed in this table. (2) The sources for the ampacities in this table are Table 310.15(B)( 16) of NFPA 70. Supplemental Information File Name Table_12.5.1_with_legislative_changes_to_Note_2_.1375108282710.docx Description Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Mon Jul 08 14:43:12 EDT 2013 and Meeting Notes Committee This change correlates with the changes to relocate "Table 310.16" to "Table 310.15(B) Statement: (16)" in the 2011 NEC. The TC editorially corrected the reference to be consistent with the NEC reference. The corrected table showing legislative text is attached. Committee Notes: Date Jul 29, 2013 Submitted By [ Not Specified The extra work of attaching the table with legislative text was done because ] TERRA has problems with simple changes to tables even those of just text changes. Public Comment No. 14-NFPA 79-2013 [Section No. 12.5.1] submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/2
12.5.1 The ampacities of conductors shall not exceed the corresponding temperature values given in Table 12.5.1 before any correction factors for ambient temperature or adjustment factors for the number of current-carrying conductors have been applied. Table 12.5.1 Conductor Ampacity Based on Copper Conductors with 60 C (140 F), 75 C (167 F), and 90 C (194 F) Insulation in an Ambient Temperature of 30 C (86 F) Ampacity Conductor Size (AWG) 60 C (140 F) 75 C (167 F) 90 C (194 F) 30 0.5 0.5 28 0.8 0.8 26 1 1 24 2 2 2 22 3 3 3 20 5 5 5 18 7 7 14 16 10 10 18 14 20 20 25 12 25 25 30 10 30 35 40 8 40 50 55 6 55 65 75 4 70 85 95 3 85 100 110 2 95 115 130 1 110 130 150 1/0 125 150 170 2/0 145 175 195 3/0 165 200 225 4/0 195 230 260 250 215 255 290 300 240 285 320 350 260 310 350 400 280 335 380 Formatted: Font: Bold Formatted: Font: Bold
Conductor Size (AWG) Ampacity 60 C (140 F) 75 C (167 F) 90 C (194 F) 500 320 380 430 600 355 420 475 700 385 460 520 750 400 475 535 800 410 490 555 900 435 520 585 1000 455 545 615 Notes: (1) Wire types listed in 12.3.1 shall be permitted to be used at the ampacities listed in this table. (2) The sources for the ampacities in this table are Table 310.16 310.15(B)(16)of NFPA 70. Formatted: Font: Italic
Second Revision No. 3-NFPA 79-2013 [ Section No. 12.5.5 ] 12.5.5 Where ampacity derating is required correction for ambient temperature correction for other than 30 C (86 F) or adjusted adjustment for more than three current-carrying conductors in a raceway or cable is required, the factor(s) shall be taken from Table 12.5.5(a) and Table 12.5.5(b). Sizing of conductors within control enclosures in wiring harnesses or wiring channels shall be based on the ampacity in cable or raceway. These factors shall apply to control conductors, Article 725, Class 1, of NFPA 70, Article 725, Class 1, control conductors, only if their continuous load exceeds 10 percent of the conductor ampacity. Table 12.5.5(a) Ambient Temperature Correction Factors For ambient temperatures other than 30 C (86 F), multiply the allowable ampacities shown ampacity by the appropriate factor shown below. Ambient Temperature ( C) Correction Factor 60 C Correction Factor 75 C Correction Factor 90 F 21 25 1.08 1.05 1.04 26 30 1.00 1.00 1.00 31 35 0.91 0.94 0.96 36 40 0.82 0.88 0.91 41 45 0.71 0.82 0.87 46 50 0.58 0.75 0.82 51 55 0.41 0.67 0.76 56 60 0.58 0.71 61 70 0.33 0.58 71 80 0.41 Table 12.5.5(b) Adjustment Factors for More Than Three Current-Carrying Conductors in a Raceway or Cable Number of Current- Carrying Conductors Percent of Values in Table 12.5.5(a) as Adjusted for Ambient Temperature I i f Necessary 4 6 80 7 9 70 10 20 50 21 30 45 31 40 40 41 and above 35 Supplemental Information File Name 12.5.5_table_with_SR_3_changes_in_legislative_text.1375108686542.docx Description submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/2
Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] Submittal Date: Mon Jul 08 14:19:43 EDT 2013 and Meeting Notes Committee The term "derating" was deleted and the remaining language was changed to be Statement: consistent with the use of the terms "adjustment factors" and "correction factors" in the standard. The title of Table 12.5.5(a) was edited as there are no allowable ampacities shown, only factors. Committee Notes: Date Jul 8, 2013 Jul 29, 2013 Submitted By [ Not Specified ensure language "allowable ampacity shown by" was removed when initial ] PC was submitted [ Not Specified The added work of adding The table with legislative changes as an attached ] was done because TERRA has problems with changes to tables even with just the text. Public Comment No. 34-NFPA 79-2013 [Section No. 12.5.5] Public Comment No. 48-NFPA 79-2013 [Section No. 12.5.5] submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/2
12.5.5 Where ampacity derating is required correction for ambient temperature correction for other than 30 C (86 F) or adjusted adjustment for more than three current-carrying conductors in a raceway or cable is required, the factor(s) shall be taken from Table 12.5.5(a) and Table 12.5.5(b). Sizing of conductors within control enclosures in wiring harnesses or wiring channels shall be based on the ampacity in cable or raceway. These factors shall apply to control conductors, Article 725, Class 1, of NFPA 70, Article 725, Class 1, control conductors, only if their continuous load exceeds 10 percent of the conductor ampacity. Table 12.5.5(a) Ambient Temperature Correction Factors For ambient temperatures other than 30 C (86 F), multiply the allowable ampacities shown ampacity by the appropriate factor shown below. Correction Factor Correction Factor Ambient Temperature ( C) Correction Factor 60 C 75 C 90 F 21 25 1.08 1.05 1.04 26 30 1.00 1.00 1.00 31 35 0.91 0.94 0.96 36 40 0.82 0.88 0.91 41 45 0.71 0.82 0.87 46 50 0.58 0.75 0.82 51 55 0.41 0.67 0.76 56 60 0.58 0.71 61 70 0.33 0.58 71 80 0.41 Table 12.5.5(b) Adjustment Factors for More Than Three Current-Carrying Conductors in a Raceway or Cable Number of Current-Carrying Conductors Percent of Values in Table 12.5.5(a) as Adjusted for Ambient Temperature iif Necessary 4 6 80 7 9 70 10 20 50 21 30 45 31 40 40 41 and above 35 Formatted: Font: Bold Formatted: Font: Bold
Second Revision No. 29-NFPA 79-2013 [ Section No. 12.6.1.1 ] 12.6.1.1 16 AWG shall be permitted if part of a jacketed multiconductor cable assembly or flexible cord, or individual conductors used in a cabinet or enclosure, under the following conditions: (1) Non-motor power circuits of 8 amperes or less, provided all the following conditions are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Overcurrent protection does not exceed 10 amperes. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 16 AWG wire ii. iii. Listed fuses marked for use with 16 AWG wire Class CC, Class J, Class CF, or Class T fuses (2) Motor power circuits supplying a motor having a full-load current rating of 8 amperes or less, provided all the following conditions are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Circuit is provided with Class 10 overload protection. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 16 AWG wire ii. iii. Listed fuses marked for use with 16 AWG wire Class CC, Class J, or Class CF, Class T fuses (3) Motor power circuits supplying a motor having a full-load current rating of 5.5 amperes or less, provided all the following are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Circuit is provided with Class 20 overload protection. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 16 AWG wire ii. iii. Listed fuses marked for use with 16 AWG wire Class CC, Class J, or Class CF, Class T fuses Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/2
Submittal Date: Wed Jul 10 12:44:04 EDT 2013 and Meeting Notes Committee Statement: This revision adds Class CF fuses to the permitted fuse types listed since Class CF fuses have the same performance requirements as Class J fuses. submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/2
Second Revision No. 30-NFPA 79-2013 [ Section No. 12.6.1.2 ] 12.6.1.2 18 AWG shall be permitted if part of a jacketed multiconductor cable assembly or flexible cord, or individual conductors used in a cabinet or enclosure, under the following conditions: (1) Non-motor power circuits of 5.6 amperes or less, provided all the following conditions are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Overcurrent protection does not exceed 7 amperes. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 18 AWG wire ii. iii. Listed fuses marked for use with 18 AWG wire Class CC, Class J, or Class CF, Class T fuses (2) Motor power circuits supplying a motor having a full-load current rating of 5 amperes or less, provided all the following conditions are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Circuit is provided with Class 10 overload protection. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 18 AWG wire ii. iii. Listed fuses marked for use with 18 AWG wire Class CC, Class J, or Class CF, Class T fuses (3) Motor power circuits supplying a motor having a full-load current rating of 3.5 amperes or less, provided all the following are met: (a) Circuit is protected in accordance with Chapter 7. (b) (c) Circuit is provided with Class 20 overload protection. Overcurrent protection is provided by one of the following: i. A listed molded-case circuit breaker marked for use with 18 AWG wire ii. iii. Listed fuses marked for use with 18 AWG wire Class CC, Class J, or Class CF, Class T fuses Submitter Full Name: [ Not Specified ] Organization: [ Not Specified ] submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/2
Submittal Date: Wed Jul 10 12:48:29 EDT 2013 and Meeting Notes Committee Statement: This revision adds Class CF fuses to the permitted fuse types listed since Class CF fuses have the same performance requirements as Class J fuses. submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/2
Second Revision No. 39-NFPA 79-2013 [ Section No. 13.1.2.6 ] 13.1.2.6 The equipment grounding (protective) conductor shall be placed as close as practicable to the associated live (insulated) conductors in order to decrease the impedance of the loop in the event of a fault. Submitter Full Name: Mark Cloutier Organization: National Fire Protection Assoc Submittal Date: Wed Jul 24 11:42:45 EDT 2013 and Meeting Notes Committee During the first Revision only parenthetical (protective bonding) and other (grounding) Statement: terms were deleted missed parenthetical terms (Earth/Earthing) and (Protective). The TC agrees that (Earth/Earthing) and (Protective) parenthetical terms be removed for clarity. Committee Notes: Date Aug 9, 2013 Submitted By Barbara Ingalls 13.1.2.6 Okay to delete 'in order' for conciseness? submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/1