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What size wire needed for 200 amp service 400 feet away direct buried single phase 240 volt 3 wire?
Wiki User
∙ 10y ago
Assuming you are working with 240v, you need 4/0 copper conductors.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoA 500 MCM copper conductor will limit the voltage drop to 3% or less when supplying 200 amps for 400 feet on a 240 volt system.
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