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

1. When doinginitial inspections on a PV system that was installed using racking that is not compliant with UL.2703, an inspector should pay special attention to which electrical attribute?

A) The equipment grounding conductor must be irreversibly spliced.
B) Racking needs to be bonded to a supplemental grounding electrode conductor.
C) The grounding conductor must be bonded directly to the primary grounding electrode.
D) Each PV module needs to be bonded to the equipment grounding conductor.

2. An installer has decided to use 31 in. long. 3.1/2 in diameter conical ground screws as the footings for a
3.840W 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) 14
B) 12
C) 10
D) 8

3. A AWG THWN-2 PV output conductors from two PV arrays are run in the same 3 in, conduit to their respective functionally grounded inverters in the building. The three PV source circuits are each protected by a
15A fuse in the combiner box at the array. The conduit, which is strapped directly to the roof,is exposed to design temperatures of 140' F (60'C) during its 30 ft.
Exposed run. What is the MAXIMUM current carrying capability value of the PV output conductors?

A) 42A
B) 61A
C) 34A
D) 54A

4. On a PV system larger than 100kw, which PV array design will provide the HIGHEST degree of performance monitoring.
Granularity, and ease of troubleshooting performance issues?

A) Multiple-string inverter system with data acquisition system located at each dc combiner
B) Multiple-string inverter system with monitored dc-to-dc converters located at each module
C) Multiple-string inverter system with data acquisition system located at each inverter.
D) Central inverter with data acquisition system located at the inverter.

5. 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

Solutions: