Code Hunter — Solar PV, NEC-2017

Code Hunter

To play this game, you need a sharp eye, a quick mind, and a 2017 National Electrical Code book.

(Fill-in-the-blank questions are looking for the exact words) used in the NEC).

1. __________. A PV subarray that has two conductors in the output circuit, one positive (+) and one negative (-). Two monopole PV subarrays are used to form a bipolar PV array.
2. Where a single overcurrent device is used to protect a set of two or more parallel-connected module circuits, the ampacity of each of the module interconnection conductors shall not be less than the sum of the rating of the single overcurrent device plus __________ percent of the short-circuit current from the other parallel-connected modules.
3. An energy storage system connected to a PV system shall be installed in accordance with Article __________.
4. __________. The generating source, and all distribution equipment associated with it, that generates electricity from a source other than a utility supplied service.
5. _______ grounding requirements and details shall be included in the documentation required in 691.6.
6. Where circuits are embedded in built-up, laminate, or membrane roofing materials in roof areas not covered by PV modules and associated equipment, the location of circuits shall be clearly marked using a __________ that is approved as being suitable for continuous exposure to sunlight and weather.
7. The circuit conductors between a stand-alone source and a building or structure disconnecting means shall be sized based on the sum of the ______ of the stand-alone sources.
8. Equipment and conductors connected to more than one electrical source are required to have overcurrent protective devices to provide protection from all sources.
9. The initiation device(s) shall initiate the _________ shutdown function of the PV system.
10. Grounding electrodes shall be __________ to be installed in accordance with 250.52 and 250.54 at the location of ground- and roof-mounted PV arrays.

Bonus Question

Are rapid shutdown systems for PV systems required to reduce the voltage on system conductors within 30 seconds?


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Christel Hunter is director of codes and standards for Cerro Wire. Chris is a senior associate member of IAEI and serves as a board member for the Southern Nevada Chapter of IAEI, the IEEE Standards Association Standards Board, and the Las Vegas Section of IEEE. Chris also serves on NEC CMP-6 and CMP-13 and NFPA 921. Chris is a Certified Standards Professional, Master Electrician, and LEED Accredited Professional. Randy Hunter is an instructor and consultant specializing in electrical code and installations, and co-owner of Hunter Technical Services. He holds ten inspections certifications from IAEI and ICC. He is the IAEI Southern Nevada IAEI Chapter president and has been a master electrician since 1988.


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