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

1. A site has an average wind speed of 25 mph and is classified as Exposure Category C per ASCE 7. What is the minimum wind design speed for the PV array structure?

A) 130 mph
B) 150 mph
C) 90 mph
D) 110 mph

2. An installer is sizing conductors for a 200-foot PV source circuit with a current of 8A at 400V DC. The design specifies a 1.5% voltage drop using copper wire at 30°C. What is the minimum wire size required?

A) 10 AWG
B) 6 AWG
C) 8 AWG
D) 12 AWG

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

4. When installing an ungrounded PV system with an open-circuit voltage of 450Vdc and a maximum voltage of
3000Vdc which procedures should be followed to establish an electrically safe condition?

A) Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
B) Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
C) Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
D) Apply lockout/tagout devices and install a listed isolation transformer.

5. A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection. The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?

A) More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.
B) Within the array boundary and more than 3.ft from the point of entry of the building.
C) More than 10ft, from the PV array or more than 5 ft. in length inside the building
D) More than 1 ft, from the VP array and more than 5 ft. In length the building.

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