PV Installations 2015 Electrical Code & more. Presented by: Ted Olechna Director Codes and Standards Support

Transcription

1 PV Installations 2015 Electrical Code & more 1 Presented by: Ted Olechna Director Codes and Standards Support

2 What I will Cover: Who ESA is Ontario Electrical Safety Code Solar PV Voltage limitations Conductor rodent protection Colour coding Bonding Rapid shutdown Solar issues Connectors matability Net Zero installations Next Code Solar / storage EV and PV 2

3 Introducing the Electrical Safety Authority ESA derives its authority from Section 113 of the Electricity Act and is responsible for Ontario s Electrical Safety Code (Reg164/99). ESA is also the provincial authority responsible for: Wiring Inspections throughout the province Product Approval Contractor licensing Utility Regulation

4 Who is ESA? Inspectors Customer Service Centre Technical and Admin support Values Passion for Safety Quality to the Public Individual Respect Financial Viability For Your Safety

5 Delegated Administrative Authority (DAA) Model ESA was formed in 1999 as a Delegated Administrative Authority (DAA) Government (i.e. MOL) Agencies, Boards, Commissions [ ABC s (i.e. OCWA, OSC, etc.)] Delegated Administrative Authorities ( DAA s ) (ESA, TSSA, TARION, VQA, TICO, OMVIC, RECO.) TSSA & ESA are the only two safety organizations and arguably held to a higher standard then other DAA s 5

6 Accountability Accountability of DAA s Primarily have members, yet remain accountable to the Minister of Government & Consumer Services 6

7 Governance Structure BOARD Board Committees AUDIT Regulatory Affairs HR & I ECRA Management Advisory Councils OPCC UAC CoAC CAC IAC 7

8 ESA Safety Evolution Public Value Compliance OESC (Wiring) Compliance & Public Safety Training OESC (Wiring, CSS) Training, awareness, research, blitz, education, partners, programs OESC and Regulations Compliance Ontario Hydro 1999 Today ESA launched

9 Vision, Mission, Mandate & Values Our Mission our purpose To improve electrical safety for the well-being of the people of Ontario. Our Vision long-term goal An Ontario where people can live, work and play safe from electrical harm. 9

10 3 Strategic Goals Accelerate Improvements in Safety Increase Compliance to Electrical Safety Regulations Ensure Strong Public Accountability 10

11 Tools to Achieve Objects a) Training b) Inspection c) Authorization d) Investigation e) Enforcement f) Registration - LEC g) Audit Inspection h) Other Public Safety Services 11

12 The Ontario Electrical Safety Code......defines compliance requirements, and is amended as needed and enforced. The Chief Engineer, Technical Advisors, as well as specialty positions, are there to provide interpretation, Bulletins, and to ensure compliance to the Code. For Your Safety

13 13 OESC 2015 includes Bulletins

14 14

15 64-060(12) Disconnecting means for combiners A disconnecting means for the combiner box is required for the PV output circuit and shall be: rated to interrupt the load; be integral with the combiner box; or installed within 2 m of the PV combiner. If the combiner box is equipped with fuses, a disconnecting means is required to be interlocked with the door. Rule 64-6(12) is not applicable to re-combiners. 15

16 64-202(4) Maximum PV circuits voltage on dwelling units For installations in or on dwelling units, the maximum PV circuits voltage 600 Vdc, if: all energized parts over 150 V to ground are accessible only to qualified persons; the PV circuits are not connected as a bipolar system; and the conductors for PV circuits over 30 volts within the building are contained in metallic raceways, metal enclosures, or cables with a metal armour or metal sheath. 16

17 64-202(5) Requirements for PV circuits up to 1000 V Bulletin 64-3-* For PV circuits higher than 750 V but not exceeding 1000 Vdc, the following Section 36 rules are not applicable: Overcurrent protection Interlocking of fuse compartments Disconnecting means 17

18 Bulletin Voltage rating of a photovoltaic source circuit New Direction New amendment to Rule (5) to increase exemption limit from 1000 V to 1500 V CE Code Part I Committee approved for next Code cycle ESA will recognize this change effective immediately Existing direction in Item 4 of the bulletin remains unchanged except for increasing limit from 1000 V dc to 1500 V dc

19 Colour coding or marking for PV PV source and output circuits are required to be coloured or coded, or both as follows: (a) for a 2-wire circuit (i) red for positive and black for negative; or (ii) black conductors manufactured with permanent surface printing indicating the polarity on the conductor 19

20 PV module bonding requirements Exposed, non-current-carrying metal parts of photovoltaic modules shall be bonded to ground. Module bonding connections shall be as specified in the module installation manual. 20

21 64-210(3) Wiring methods, conductors support - New PV conductors are required to be protected against mechanical damage and supported by straps or other devices located (a) within 300 mm of every box or connector; and (b) at intervals of not more than 1 m throughout the run. Bulletin

22 Rule PV system rapid shutdown Need for rapid shutdown Fire service representatives are concerned about the inherent shock hazard that most PV power systems present to first responders. Which PV systems must comply to shutdown requirements? Rapid-shutdown requirements apply to PV systems on buildings. It applies to PV system : PV source and output conductors, Inverter input and output (with utility-interactive inverters, primarily inverter input) Batteries, charge controller input and output 22

23 Rule PV system rapid shutdown Rule does not provide how to design the rapid shutdown process. The Rule specifies the objective and the end result of the rapid shutdown process that includes: circuits required to be de-energized; acceptable voltage; and time to archive that voltage. 23

24 Rule PV system rapid shutdown Which circuits must the shutdown system control? Requirements for shutdown apply to PV circuits that are: more than 3m from a PV; more than 1.5 m in length inside a building 24

25 Rule PV system rapid shutdown Where should the rapid shutdown initiator be located? The Rule does not specify the location. Keeping in mind that the initiator is to be used by emergency responders, the most suitable location should be typically at or near the service equipment. 25

26 PV system rapid shutdown New Example 1 Rapid shutdown systems Remember! The rule does not mandate module-level control 26

27 Rule PV system rapid shutdown During the shutdown, what is the limitation on voltage and time frame to reach that voltage? Within 10 s of rapid shutdown initiation, the voltage shall be limited to 30 V, 240 VA. Note: This requirement also applies to inverters. Some inverters may not reach 30 V within 10 s when they are disconnected. PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN A marking shall be capital letters with a with a minimum height of 9.5 mm, in white on a red background 27

28 PV connectors mateability issues Safety hazards Interconnecting connectors from different manufacturers voids their certification. Testing Lab results connectors from different manufacturers shows significant difference in the temperature rise between various manufacturers. 28

29 PV connectors mateability issues ESA s Direction Installer to ensure connectors are certified as a mated pair PV installations with connectors that are not used as a mated pair are not permitted as it is considered unapproved product, Rule If specified equipment has PV connectors from different manufacturers, a change in system design to address mateability and certification issues is needed. 29

30 Bulletin Wiring methods for solar PV systems Corrective action if connectors are not approved as mated pairs: Replace a connector with a type and model that forms a mated pair; or Use a certified adapter with the proper connectors for mating, for example: 30

31 Bulletin Wiring methods for solar photovoltaic systems PV dc arc fault protection Question Is dc arc fault protection required for PV source or output circuits on ground mounted systems (not on a building) operating at 80 V or greater? Answer No, notwithstanding Rule requirements, dc arc fault protection is NOT required for PV source or output circuits of ground mounted systems. PV dc arc fault protection is only required for PV source and output circuits operating at 80 V or greater and installed on buildings. 31

32 Bulletin Wiring methods for solar photovoltaic systems PV dc arc fault protection Rationale The original intent of arc fault protection requirements is to prevent building fires when PV systems are installed on buildings. When PV systems are ground-mounted or installed on trackers, there is a fire risk limited to PV installation only. NEC 2017 excludes large PV Systems from Arc Fault protection requirements, similar to the Ontario Direction above. 32

33 (5) Wiring methods, protection of PV conductors against rodents Where the dc arc-fault protection is not located at the module, PV source circuit conductors and cables on or above a building, shall be provided with mechanical protection, in the form of an enclosed raceway or other acceptable material to protect against damage from rodents. 33

34 Examples of acceptable screening for protection against rodents 34

35 Rule (5) * Rodent protection for photovoltaic systems Question For the purpose of Rule (5), do optimizers providing the equivalent dc arc fault protection permit the omission of protection from rodent requirements? Answer Yes provided that: 1. The optimizers are controlled by an inverter that is approved with dc arc-fault protection that is capable of detecting arc-fault at the module; and 2. The optimizer is installed at the module* and interrupts the power at the module. 35

36 Rule (5) * Mechanical Protection for Damage from Rodents, Provisions for Deviation Request Protection is required for all roof top PV installations (Comm & Res.) Complete guarding on commercial buildings is difficult Commercial systems are continuously monitored for faults and output Reduced risk of fire for non-combustible building 36

37 Rule (5) * Mechanical Protection for Damage from Rodents, Provisions for Deviation Request ESA will accept a deviation request from the requirements of Rule (5) when the deviation request confirms: 1. The building does not contain a dwelling unit directly below roof line. 2. The building is of non-combustible construction. 3. Conditions of maintenance, supervision, and monitoring ensure that if damage is detected, it will be corrected immediately. 4. The building owner signs the deviation request. 37

38 Next Code Unbalanced interconnections changed from provide a balanced 3-phase system Within limits of supply authority Utility Interactive Inverter Utility or supply network Attachment Plugs (g) the devices are a mated pair; and (h) the attachment plugs and similar wiring devices are compatible with the types of cables used. 38

39 PV Rapid shutdown More than 1 m from PV array 39

40 PV Rapid shutdown (3) Photovoltaic system rapid shutdown device shall limit photovoltaic source or output circuits located more than 1m from the photovoltaic array to not more than 30 V and 240 V A within s of rapid shutdown initiation A device used to initiate the photovoltaic rapid shutdown shall be readily accessible and located A label indicating the photovoltaic system is equipped with photovoltaic rapid shutdown shall be installed at the supply authority meter location and at the consumer s service equipment location. 40

41 Net Zero Homes - PV installations Net Zero Energy home 41

42 Net Zero Homes - PV installations 2015 Electrical Code requirements (some) 2015 Electrical Code requirements (some): DC Arc-fault protection Rule requires PV systems operating at a maximum system voltage of 80 V or greater, to be protected by AFCI PV rapid shutdown Rule applies to battery circuits, charge controller input and output PV colour coding Rule , red for positive and black for negative DC grounding Rule , one conductor of a 2-wire system with a system voltage of 50 V or greater shall be grounded Ungrounded PV systems Rule , all source and supply circuit conductors shall have overcurrent protection and be labeled 42

43 Rule 2-022, Energy storage systems (ESS) Self-contained ESS must be approved for use/sale (Reg. 438/07) Approval: By certification agency (accredited by SCC) Meet ANSI/CAN/UL Energy storage systems and equipment May include equipment for: Charging Discharging Control Protection Power Conversion

44 Rule 2-022, Energy storage systems (ESS) An ESS can be: Electrochemical (batteries, typical for residential PV) Chemical (hydrogen fuel) Mechanical (flywheel or compressed air) Thermal An ESS can store large amounts of energy. Fire or Shock hazard System to be evaluated and tested for safe operation When an ESS is composed of individual assembled devices connected onsite must meet OESC as a wiring installation

45 Rule 2-022, Energy storage systems (ESS) Energy Storage Systems (ESS)

46 Energy storage systems ESA requirement for all energy storage systems Approved - OESC, Rule and Canadian Standard published in November of 2016, ANSI/CAN/UL Standard for Safety for Energy Storage Systems and Equipment, Problems When incorporating ESS and PV if interactive, need to be approves as so 46

47 Consistency issues Connection Authorization when Operating in parallel with the utility Question: When parallel generation such as a Net metering or load displacement is connected in parallel with the utility, is a connection authorization required? 47

48 Consistency issues Connection Authorization when operating in parallel with the utility Answer: Yes. The C/A informs the LDC. 48

49 EV supply equipment and Solar power

50 50

51 Building Code & EV Ready Clause (1)(c) of Division A of the Regulation is amended by adding the following definition: Electric vehicle supply equipment means electric vehicle supply equipment as defined in Rule of the Electrical Safety Code adopted under Ontario Regulation 164/99 (Electrical Safety Code) made under the Electricity Act, (8) Clause (1)(c) of Division A of the Regulation is amended by adding the following definition: House means a detached house, semi-detached house or row house containing not more than two dwelling units. 51

52 Building Code & EV Ready Section Electric Vehicle Charging Systems (1) Except as provided in Sentence (3), where vehicle parking spaces are located in a building, other than an apartment building, not less than 20% of the parking spaces shall be provided with electric vehicle supply equipment installed in accordance with Section 86 of the Electrical Safety Code adopted under Ontario Regulation 164/99 (Electrical Safety Code) made under the Electricity Act, (2) The remaining parking spaces located in a building described in Sentence (1) shall be designed to permit the future installation of electric vehicle supply equipment that conforms to Section 86 of the OESC. 52

53 Building Code & EV Ready Section Electric Vehicle Charging Systems (1) Except as provided in Sentence (3), where vehicle parking spaces are located in a building, other than an apartment building, not less than 20% of the parking spaces shall be provided with electric vehicle supply equipment installed in accordance with Section 86 of the Electrical Safety Code adopted under Ontario Regulation 164/99 (Electrical Safety Code) made under the Electricity Act, (2) The remaining parking spaces located in a building described in Sentence (1) shall be designed to permit the future installation of electric vehicle supply equipment that conforms to Section 86 of the Electrical Safety Code.. 53

54 Building Code & EV Ready Electric Vehicle Charging Systems (3) Except as provided in Sentence (6), where a house is served by a garage, carport or driveway, the following shall be installed to permit the future installation of electric vehicle supply equipment that conforms to Section 86 of the Electrical Safety Code: (a) a minimum 200 amp panelboard, (b) a conduit that is not less than 27 mm trade size and is equipped with a means to allow cables to be pulled into the conduit, and (c) a square 4-11/16 in. trade size electrical outlet box. 54

55 Current Status Ministry of Municipal Affiars, Building and Development Branch is reviewing What it means 20% as well as a clear direction for 80% EV ready What happens to subdivisions where infrastructure is already built What size of EV charging station is required for the 20%? Consultation - EV requirements for Apartments 55

56 56 Thank You