If circuit conductors for PV systems were sized using the requirements of 690.8(B) and there are no external sources of parallel currents that exceed the ampacity of the conductors, then overcurrent protection is required.

Question

Quizplus · Accepted Answer

According to NEC 690.8(B), if the conductors are properly sized based on the requirements and there are no external sources of parallel currents that exceed the conductor's ampacity, overcurrent protection is not required because the conductors are deemed adequately protected by their sizing.

If Circuit Conductors for PV Systems Were Sized Using the Requirements