NABCEP Code Requirements 4

Question 1

Per NEC 690.9, overcurrent protection is NOT required for a PV source circuit conductor when:

Accepted Answer

The conductor ampacity is greater than the maximum available fault current from all parallel sources

Answer

NEC 690.9(A) exception permits omitting OCPD when the conductor ampacity exceeds the maximum fault current available from parallel-connected sources.

Question 2

According to NEC 690.31(C), single-conductor cables used as PV wire in exposed outdoor locations shall be:

Accepted Answer

Listed for use in wet locations and sunlight resistant

Answer

NEC 690.31(C) requires single-conductor PV wire to be listed for wet locations and sunlight resistant when installed outdoors.

Question 3

What is the maximum DC voltage permitted for commercial and utility-scale PV systems under NEC Article 690?

Accepted Answer

1500V

Answer

NEC 690.7(A) permits PV systems up to 1500V DC for commercial and utility-scale installations using listed 1500V equipment.

Question 4

When a rooftop PV array is installed on a building with a hip roof, which code document specifies the required setback from the ridge?

Accepted Answer

IFC Section 605 / local fire codes

Answer

IFC Section 605 and local fire codes require specific setbacks from ridges, hips, and eaves to allow firefighter access.

Question 5

Under NEC 690.4(B), how many PV systems are permitted to be installed on or in a single building or structure?

Accepted Answer

Multiple systems are permitted

Answer

NEC 690.4(B) explicitly permits multiple PV systems to be installed on a single building.

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