Question: A 4 8 0 - volt, 3 - phase feeder supplies 8 5 amperes of continuous load and 5 0 amperes of noncontinuous load. The

A 480-volt, 3-phase feeder supplies 85 amperes of continuous load and 50 amperes of noncontinuous load. The feeder is installed in a rigid metal conduit, Type RMC, in an area with the ambient temperature of 123F. What minimum standard size overcurrent protective device is required for the feeder?
Answer:
A 4 8 0 - volt, 3 - phase feeder supplies 8 5

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