19. Where the supply to a 45-kVA, 3-phase, 480-volt primary transformer consists of a 12-foot tap made from an existing 200-ampere feeder, the minimum size tap conductors between the 200-ampere feeder and the primary of the transformer must be at least ?. a. 6 AWG THWN copper b. 4 AWG THWN copper c. 3 AWG THWN copper d. 2 AWG THWN copper
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