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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. An installer is sizing conductors for a 200-foot PV source circuit with a current of 8A at 400V DC. The design specifies a 1.5% voltage drop using copper wire at 30°C. What is the minimum wire size required?

A) 12 AWG
B) 10 AWG
C) 6 AWG
D) 8 AWG

2. The point-of-utility connection of a residential utility-interactive PV system is in the main distribution panel.
If the busbars of the main distribution panel are rated at 200A, and if the distribution panel has a 200A main breaker, the rated output current of the inverter cannot exceed.

A) 200A
B) 24A
C) 40A
D) 32A

3. A module's Isc is 8.5A at STC. At 1200 W/m², what is the Isc?

A) 11.5A
B) 10.8A
C) 9.5A
D) 10.2A

4. The following dc portion of a PV schematic (functionally grounded conductor not shown) is submitted to the building official for permit approval. The building official, who also is he AHJ, allow the system to be installed by requiring what NEC-required MINIMUM size equipment grounding conductor at Location A?

A) #8 copper
B) #10 copper
C) #12 aluminum
D) #6 aluminum

5. A rooftop PV array uses a ballasted racking system with a total weight of 4 psf. The roof's maximum allowable load is 20 psf, including a snow load of 15 psf. Is this installation permissible?

A) Yes, with no restrictions
B) Yes, if snow load is mitigated
C) No, exceeds total load
D) No, requires structural reinforcement

Solutions: