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NABCEP PVIP Exam Syllabus Topics:

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

1. A PV connection is being made at the center of a 300 ft. long 200 feeder. See the attack diagram. The feeder originates in the upper third of the 800A main service panel (800A main breaker) with a 200A breaker and terminates in a 200A main-lug-only subpanel. The rated output of the PV system inverter is 100A.

Which are the NIMUMUM actions required to achieve an NEC-compliant installation?

A) Install a 325A at the PV source connection point on the portion of the feeder toward the subpanel, increase the capacity of this portion of the feeder to 325A, add a 200A main breaker to the subpanel, and move the 200A breaker to bottom of the main service panel, away from the 800A main breaker.
B) Install a 200A breaker at the PV source connection point on the portion on the portion of the feeder toward the subpanel and move the 200A breaker to the top of the main service panel, adjust to the 800A main breaker.
C) Install a 325A breaker at the PV source connection point on the portion of the feeder toward the subpanel. Increase the capacity of the feeder from the main panel board to 325A breaker to the bottom of the main service panel, away from the 800 main breaker.
D) Install a 200A breaker at the PV source connection point on the portion of the feeder toward the subpanel, maintain the capacity of the entire feeder, and move the 200A breaker to the bottom of the main service panel, away from the 800A main breaker.

2. A racking system is designed for a wind speed of 120 mph. The site's design wind speed increases to 130 mph. What is the percentage increase in wind pressure?

A) 33%
B) 25%
C) 17%
D) 10%

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

4. A PV system combiner box contains six source circuits, each with an Isc of 8A. The output conductor is 6 AWG THWN-2 copper rated at 90°C. What is the maximum allowable OCPD rating per NEC?

A) 80A
B) 70A
C) 60A
D) 50A

5. A grounding electrode is required at the location of all ground-mounted and pole-mounted PV arrays. Which type of grounding electrode is NOT permitted for arrays. Which type of the grounding electrode is NOT permitted for array grounding?

A) Metal frame of a building or structure in direct with the earth for 10 ft. or more.
B) Concrete-encased 4 AWG copper conductor at least 20 ft, in length
C) Aluminum structural member in direct contact with the earth for 10ft, or more
D) Metal underground water pipe in direct contact with the earth for 10 ft. or more.

Solutions: