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

1. The NEC requires that PV systems installed on dwellings incorporate which of the following components?

A) Blocking diodes across each module
B) A lockable utility disconnect at the point-of-utility interconnection
C) Dc lightning surge arrestors
D) A dc ground-fault protect device

2. Which load path connections need to be analyzed when determining live and dead loads on a PV array system installed directly to a metal seam roof?

A) Rail to metal seam roof, metal seam roof to top plate, top plate to wall system
B) Module to rail to metal seam roof, metal seam roof sheathing/rather system.
C) Module to rail to metal seam roof, metal seam roof to top plate system
D) Module to rail, rail to roof sheathing, roof sheathing to wall, wall to base plate/foundation system

3. According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:

A) Means of locking out both disconnects when the PV system inverter is being serviced.
B) Interface that shuts down the PV system if the utility connection is lost.
C) Permanent plaque or directory that indicates the locations of both disconnects.
D) Permanent plaque or directory that indicates the location of the PV utility connection.

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

5. A PV system includes a 600V DC disconnect with a fault current rating of 10 kA. The available fault current from the inverter is 12 kA. What must be done to comply with NEC 110.10?

A) Reduce the array size to lower fault current
B) Replace the disconnect with a 15 kA-rated unit
C) Install a current-limiting fuse upstream
D) No action needed; the rating is sufficient

Solutions: