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

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

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

2. A PV system installation utilizes micro inverters connected to each module of the array. Each micro inverter has a nominal rated output of 250WV. Single phase. The microinverters are listed so that multiple inverters may be connected in parallel to a single feeder circuit, and each inverter has ancable and connector rated for
30A. What is the MAXIMUM number of inverters that may be wired together on a single 30A feeder circuit?

A) 17
B) 28
C) 15
D) 23

3. A ground resistance measurement on a newly installed grounding electrode indicates a resistance of 130. The earth connection may be improved by connecting the existing electrode to a:

A) Supplement 1/4 in, in thick aluminumplate electrode buried 30 in. down and located 7 ft, away.
B) Supplemental grounding electrode located 5 ft, away.
C) Buried water piping system using 40 ft. of 2 in. PVC piping located 10 ft awat.
D) Supplemental copper plated steel grounding electrode located 8 ft, away.

4. A homeowner is weighing the PV module options for a roof-mounted solar array. Which is a correct option to present to the homeowner?

A) Building-integrated PV shingles will be flush or nearly flush with other shingles, but the electrical energy produced will be less than polycrystalline or monocrystalline modules.
B) Rapid shutdown requirements within 1 ft of the array boundary.
C) Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
D) Polycrystalline modulesare more shade-tolerance than eitheramorphous or monocrystalline modules and allow a larger array to be installed, including in area where shading could be seasonally problematic.

5. A commercial 600v carport-mounted PV system is installed with rigid running under the parking lot to an inverter pad located at the edge of the parking lot. At what depth below the parkinglot base MUST condult be buried?

A) 18 in.
B) 24 in.
C) 12 in.
D) 36 in.

Solutions: