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

1. An 8KWsc roof-mounted array is placed on a school building. The inverter is located within 1 ft, of the array boundary and has an integrated ac-and dc-disconnecting switch. The system is to be connected to a 400A load center, protected by a 400A main breaker. Which of the following MUST be included to meet NEC requirements?

A) A rapid shutdown initiationdevice operating contractor within 1 ft, of the array to de-energize the dc subarrays
B) An ac-disconnect label with the location of the rooftop dc-disconnect switch.
C) A readily accessible dc disconnect with rapid shutdown initiation device permanently labeled
D) A readily accessible ac-disconnecting switch, who location is identified on the system directory

2. Insulation resistance testing is being performed on the conductors of a 3-year-old PV system. With a constant high test voltage being applied to a dc conductor, the test results in a high resistance reading. Which does this finding indicate?

A) Typical module degradation has lowered the output of the system's strings.
B) Wiring insulation has degraded and is resulting in leakage.
C) Soling of modules has reduced the efficiency of the system.
D) The conductor insulation is functioning as intended.

3. What is an arc-flash boundary?

A) 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
B) The approach limit distance from energized electrical equipment within which a person is considered to be exposed to full circuit voltage.
C) The approach limit distance within which inadvertent movement exposes personnel to increase ris due to electrical arc-over potential.
D) The distance within which qualified personnel can safely perform bare-handed work on exposed energized electrical equipment operating at 50 volts or more.

4. Which insulation color is allowed for a current-carrying roottop dc conductor on a functionally grounded 6kw PV system?

A) White
B) Red
C) Green/yellow
D) Green

5. 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) 72
B) 50A
C) 163
D) 400A

Solutions: