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NABCEP PVIP Exam Syllabus Topics:

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

1. A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection. The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?

A) More than 1 ft, from the VP array and more than 5 ft. In length the building.
B) More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.
C) Within the array boundary and more than 3.ft from the point of entry of the building.
D) More than 10ft, from the PV array or more than 5 ft. in length inside the building

2. A PV system includes a 600V DC disconnect with a fault current rating of 10 kA. The available fault current from the inverter is 12 kA. What must be done to comply with NEC 110.10?

A) Reduce the array size to lower fault current
B) Replace the disconnect with a 15 kA-rated unit
C) Install a current-limiting fuse upstream
D) No action needed; the rating is sufficient

3. A designer is selecting a charge controller for an off-grid system with a 6 kW PV array and a 48V battery bank. The array Isc is 130A. What is the minimum current rating for the charge controller?

A) 162.5A
B) 175A
C) 150A
D) 130A

4. A PV system's inverter displays a ground-fault error. What is the first troubleshooting step?

A) Replace the inverter
B) Verify DC disconnect operation
C) Inspect AC wiring
D) Check array insulation resistance

5. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.15
B) 1.12
C) 1.18
D) 1.21

Solutions: