NABCEP NEC Article 690 Applications 2

Question 1

Under NEC 690.13, how many disconnecting means are permitted to serve as the PV system disconnecting means when the system has multiple dc circuits?

Accepted Answer

Up to six disconnects grouped in one location

Answer

NEC 690.13 allows up to six disconnecting means for PV systems, consistent with the six-handle rule used in service disconnects.

Question 2

NEC Article 690 requires rapid shutdown of PV systems on buildings. What is the maximum voltage PV conductors inside the array boundary must be reduced to within 30 seconds of initiating shutdown?

Accepted Answer

30 V

Answer

Per NEC 690.12, conductors inside the array boundary must be de-energized to 30 V or less within 30 seconds of rapid shutdown initiation.

Question 3

For a roof-mounted PV system, what is the boundary of the rapid shutdown zone as defined in NEC 690.12?

Accepted Answer

3 ft from the array in all directions and 1 ft above the roof

Answer

NEC 690.12 defines the array boundary as within 3 ft of the array in all directions and 1 ft above the roof surface.

Question 4

According to NEC 690.31(A), PV source and output circuits inside a building must be contained in which of the following?

Accepted Answer

Any listed wiring method suitable for the location

Answer

NEC 690.31(A) requires PV conductors inside buildings to use listed wiring methods appropriate for the environment, not a specific type.

Question 5

What does NEC 690.13(B) require regarding the location of the PV system disconnecting means?

Accepted Answer

It must be at a readily accessible location

Answer

NEC 690.13(B) requires the PV system disconnecting means to be in a readily accessible location.

(NABCEP) Certified North American Board of Certified Energy Practitioners Specialist Practice Test

(NABCEP) Certified North American Board of Certified Energy Practitioners Specialist Practice Test

NABCEP NEC Article 690 Applications 2