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Category: Electrical
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Experience:  Electrical Contractor
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WHAT SIZE COPPER WIRE IS USED FOR SEC. SIDE OF 480 VOLT 3 PHASE

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WHAT SIZE COPPER WIRE IS USED FOR SEC. SIDE OF 480 VOLT 3 PHASE 75KVA TRANSFORMER FEEDING 200 AMP 120 V. /208V. PANEL, AND SIZE OF GROUND FOR TRANSFORMER.
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You are going to need to use 3/0 copper. Then for the grounding wire you will need to use #4 thhn copper. But just remember you will need to size your primary side properly.

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Wednesday, April 21, 2010 7:34:32 PM
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Wednesday, April 21, 2010 7:41:27 PM