Branch circuits and feeders in a separately derived 60-volts to ground system shall be provided with a means to ____.
A) prevent current surges
B) simultaneously disconnect all ungrounded conductors
C) protect from lightening discharges
D) permit service access

Question

Quizplus · Accepted Answer

According to NEC 250.30(B), branch circuits and feeders in separately derived systems must be provided with a means to simultaneously disconnect all ungrounded conductors. This is necessary for safety reasons as it ensures that all power to the circuit is cut off in the event of an emergency. A means of disconnecting also allows for easy access for servicing and maintenance. While protecting against lightning discharges is important, it is not directly related to branch circuit and feeder requirements in a separately derived system. Similarly, preventing current surges does not necessarily require a means of disconnecting, and allowing for service access is only one aspect of the overall requirement.

Branch Circuits and Feeders in a Separately Derived 60-Volts to Ground