NABCEP Code Requirements 5

Question 1

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

Accepted Answer

Temperature coefficient of Voc (negative value)

Answer

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

Question 2

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

Accepted Answer

UL 2703

Answer

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

Question 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?

Accepted Answer

50 feet

Answer

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

Question 4

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

Accepted Answer

Ride-through capability during voltage and frequency disturbances

Answer

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

Question 5

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

Accepted Answer

Indicates and interrupts the fault, and may disconnect the array

Answer

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

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

NABCEP Code Requirements 5