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

1. A 5 kW system has a daily output of 20 kWh at 5 PSH. What is the total derate factor?

A) 0.80
B) 0.75
C) 0.90
D) 0.85

2. According to the 2020 National Electrical Code (NEC), what is the minimum required working clearance in front of a 1000V DC PV inverter installed in a non-dwelling unit?

A) 30 inches wide, 36 inches deep
B) 48 inches wide, 48 inches deep
C) 36 inches wide, 48 inches deep
D) 36 inches wide, 36 inches deep

3. What is an arc-flash boundary?

A) The distance within which qualified personnel can safely perform bare-handed work on exposed energized electrical equipment operating at 50 volts or more.
B) The approach limit distance within which inadvertent movement exposes personnel to increase ris due to electrical arc-over potential.
C) The approach limit distance within which a person could receive a second-degree burn in the event that an electrical arc flash were to occur
D) The approach limit distance from energized electrical equipment within which a person is considered to be exposed to full circuit voltage.

4. A PV system interconnects at a 480V three-phase service. The inverter output current is 20A per phase. What is the minimum size of the equipment grounding conductor (EGC) per NEC 250.122 if the OCPD is 30A?

A) 12 AWG
B) 8 AWG
C) 14 AWG
D) 10 AWG

5. A PV module is mounted with a 2-inch standoff from a shingle roof. What is the minimum clearance required for fire access per the International Fire Code (IFC)?

A) 9 inches
B) 1 inch
C) 3 inches
D) 6 inches

Solutions: