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

1. A PV system uses 10 AWG USE-2 wire for a 150-foot source circuit run with an Isc of 8A. The terminals are rated at 75°C. What is the ampacity of the conductor after applying NEC temperature and conduit fill adjustments at 35°C?

A) 30A
B) 35A
C) 45A
D) 40A

2. An 8 AWG bare copper equipment ground conductor (EGC) is wire tied to the module mounting structure of a commercial rooftop solar array. After a few years of operation, some spots on the EGCbegin to turn a green color and appear to be corroding more significantly that other places. What would the MOST likely cause of the problem?

A) Bypass dlode failures inducing current on the EGC
B) Nyton wire ties in contact with the copper wire
C) Array racking touching the EGC at multiple points
D) A break in the EGC, leaving the array ungrounded

3. Which electrical connection requires the use of a torque device to complete the connection per NEC requirements?

A) Underground direct-burial twist-on wire connector
B) Soldered splices in a conduit body
C) Crimp-on log to the battery cable
D) Screw terminals on an ac receptacle outlet

4. A grounding electrode is required at the location of all ground-mounted and pole-mounted PV arrays. Which type of grounding electrode is NOT permitted for arrays. Which type of the grounding electrode is NOT permitted for array grounding?

A) Concrete-encased 4 AWG copper conductor at least 20 ft, in length
B) Aluminum structural member in direct contact with the earth for 10ft, or more
C) Metal frame of a building or structure in direct with the earth for 10 ft. or more.
D) Metal underground water pipe in direct contact with the earth for 10 ft. or more.

5. A PV module has a NOCT of 47°C. At 1000 W/m² and 35°C ambient, what is the cell temperature?

A) 55°C
B) 47°C
C) 59°C
D) 63°C

Solutions: