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.

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  1. Under NEC 690.7, when calculating open-circuit voltage for PV source circuits at low temperatures, installers must use which temperature coefficient?

    Answer: Temperature coefficient of Voc (negative value)

    NEC 690.7 requires using the module's negative temperature coefficient of Voc to determine maximum voltage at the lowest expected ambient temperature.

  2. Which listing standard covers PV module mounting and racking systems for structural and electrical compliance?

    Answer: UL 2703

    UL 2703 is the listing standard for PV mounting systems, mounting structures, and grounding/bonding components.

  3. Per NEC 690.13(B), the PV system disconnecting means must be located within sight of, and within how many feet of, the inverter it serves?

    Answer: 50 feet

    NEC 690.13(B) requires the disconnecting means to be within sight and within 50 feet of the inverter.

  4. IEEE 1547-2018 sets requirements for distributed energy resource interconnection. Which of the following is a new requirement compared to older versions?

    Answer: Ride-through capability during voltage and frequency disturbances

    IEEE 1547-2018 added mandatory voltage and frequency ride-through requirements so DER systems support grid stability instead of immediately tripping.

  5. Under NEC 690.35, ungrounded PV systems must be equipped with a ground-fault protection device that does which of the following?

    Answer: Indicates and interrupts the fault, and may disconnect the array

    NEC 690.35 requires ungrounded systems to have GFPD that detects, indicates, and interrupts ground faults in the array.

  6. When a string inverter's output is connected to a load center using a back-fed breaker, and the panel busbar is rated 200A with a 200A main breaker, what is the maximum allowable rating of the back-fed breaker per NEC 705.12?

    Answer: 40A

    120% of 200A = 240A; 240A minus the 200A main = 40A maximum for the back-fed breaker.

  7. Which NEC section requires that PV source and output circuits be kept separate from each other and from other wiring systems, unless a specific exception applies?

    Answer: NEC 690.4(C)

    NEC 690.4(C) requires PV system wiring to be separated from other non-PV wiring unless they share an identified raceway or enclosure.