Question: A 1 2 0 / 2 0 8 - volt, 3 - phase feeder supplies continuous load of 3 7 . 5 kVA, consisting of

A 120/208-volt, 3-phase feeder supplies continuous load of 37.5 kVA, consisting of computers and other nonlinear loads. The feeder is installed in a rigid metal conduit, Type RMC, in an area with the ambient temperature of 95F. What minimum size ungrounded THHN conductors are required for the feeder?

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