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What is the minimum cable size required for 400Amps incoming supply?
Wiki User
∙ 12y ago
A 600 MCM copper conductor with a insulation factor of 75 or 90 degrees C is rated for 420 and 455 amps respectively. To reduce the wire size from a single conductor, a parallel feed of 3/0 can be used.
Wiki User
∙ 12y ago
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