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

1. When running horizontal 1-1/4 in, electrical metallic tubing (EMT) with compression fittings, what is the MAXIMUM permissible distance between condult supports?

A) 10 ft
B) 20 ft
C) 3 ft
D) 14 ft

2. A tap conduct is to be connected to a feeder supplied by both a utility service source and a utility-interactive inverter source. The feeder utility source is a 400A breaker in a service panel, the inverter overcurrent protection device is rated at 100A, and the inverter continuous output current is 72. The tap conductor that is to be installed will be 17 ft. long. It will be located in a raceway and will supply a subpanel with a 50A main breaker.
What is the MINIMUM required ampacity of the tap conductor?

A) 400A
B) 163
C) 50A
D) 72

3. A bifacial PV module has a rated power of 350W on the front side and a bifaciality factor of 70%. If the rear side receives 200 W/m² of irradiance, what is the total power output under STC front-side conditions (1000 W
/m²)?

A) 490W
B) 385W
C) 449W
D) 420W

4. 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) 36 inches wide, 36 inches deep
B) 36 inches wide, 48 inches deep
C) 48 inches wide, 48 inches deep
D) 30 inches wide, 36 inches deep

5. An installer has decided to use 31 in. long. 3.1/2 in diameter conical ground screws as the footings for a 3.840 W solar electric system. Access to he is too difficult to pour concrete footings. The soll is classified as sandy loam. The design wind speed is 90 mph with an uplift force of 32 ibs/ft2. What is the MINIMUM number of screw required to resist uplift loads?

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

Solutions: