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

1. Inspection of a new PV installation shows that the dwelling uses a galvanized water pipe for its grounding electrode and that the PV system now shares the connection. Which of the following is an acceptable supplemental electrode method to ensure the integrity of having a grounding electrode?

A) Connecting the water pipe to a gas pipe that is known to be solidly grounded
B) Connection the service panel to a copper-clad steel ground rod near the panel
C) Connecting the service panel to an auxiliary ground used by a lightning protection system
D) Connecting the water pipe to the service entrance panel metal structure

2. A PV module shows burn marks near the junction box. What is the most likely cause?

A) Lightning strike
B) Loose connection
C) Ground fault
D) Overcurrent condition

3. Per NEC 690.8, a PV source circuit has an Isc of 9.5A. What is the minimum ampacity required for the conductor?

A) 15.0A
B) 11.875A
C) 14.25A
D) 9.5A

4. Which of the following is an NEC requirement regarding access for large-scale PV electric power production facilities?

A) All fencing and associated gates must have ac and dc current and voltage exposure labvels and must be electrically isolated from the solar facility.
B) Arc flash warning labels must be field-applied by the installer at all access points for qualified persons and at the point of the utility interconnection directory.
C) Field-applied hazard markings must be installed, and access to the supply station is to be restricted by fencing or other adequate means.
D) Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.

5. A site has a known magnetic declination of 14 west. What should the corrected azimuth reading of the array be in order to be facing true south?

A) 166
B) 194
C) 270
D) 180

Solutions: