Practice Test Geeks(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test
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Code Requirements Flashcards

7 cards from real NABCEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Code Requirements flashcards as text

  1. Under NEC 690.47, which grounding method is acceptable for a transformerless (non-isolated) utility-interactive inverter PV system?

    Answer: A grounding electrode system connected at the inverter with equipment grounding conductors throughout

    NEC 690.47 requires a grounding electrode system and equipment grounding conductors throughout for transformerless inverter systems.

  2. NEC 690.15 requires a means to disconnect all ungrounded conductors of a PV system from all other conductors. What is this device commonly called?

    Answer: PV system disconnecting means

    NEC 690.15 mandates a PV system disconnecting means to isolate PV conductors from other wiring.

  3. Per NEC 705.12(B)(2), the sum of ampere ratings of overcurrent devices supplying power to a busbar or conductor shall not exceed what percentage of the busbar or conductor ampere rating?

    Answer: 120%

    NEC 705.12(B)(2) limits the total supply to 120% of the busbar rating when the back-fed breaker is at the opposite end from the main breaker.

  4. According to UL 1741, inverters intended for utility-interactive operation must have anti-islanding protection to disconnect within how many seconds when grid power is lost?

    Answer: 2 seconds

    UL 1741 and IEEE 1547 require anti-islanding disconnection within 2 seconds of detecting loss of grid voltage.

  5. Under NEC 690.56, what marking is required on the exterior of a one- or two-family dwelling that has a PV system with rapid shutdown?

    Answer: A rapid shutdown switch location label and a label indicating PV system is present

    NEC 690.56 requires a permanent label indicating the location of the rapid shutdown switch and that a PV system is present.

  6. What is the minimum wire bending space and clearance requirement that must be maintained at all PV disconnects per the NEC?

    Answer: Working space per NEC Article 110.26 must be maintained in front of all disconnects

    NEC 110.26 working space requirements apply to all PV disconnects just as they do to any electrical equipment.

  7. Which NFPA standard specifically addresses the installation requirements for stationary energy storage systems, including lithium-ion batteries paired with residential solar?

    Answer: NFPA 855

    NFPA 855 sets installation requirements and size limits for stationary energy storage systems including residential battery storage.