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nunya
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join:2000-12-23
O Fallon, MO
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2 recommendations

reply to Toddus

Re: 400 amp single phase service wire size residential

Your electrician or architect / engineer should must do a load calculation. Due to single phase transformer sizes, most utilities really offer 320A service, not 400A.

This isn't something you take a chance on or get advice from an internet site. Hire someone who knows what they are doing.