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    sagebrush's Avatar
    sagebrush Posts: 1, Reputation: 1
    New Member
     
    #1

    Mar 31, 2008, 10:40 PM
    Wire size
    I want to wire a shed that is 225 ft from power I want 40 amps of service what size wire do I need for 220 volt?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
     
    #2

    Apr 1, 2008, 04:02 AM
    I'd use #4 and a 50 or 60A breaker, not 40A.
    You need to upsize the wire for that distance. This is NOT a code requirement, it is a code recommendation.


    Using #6 you can pull up to 40A breaker up to around 180'.
    If you jump to #4 you can pull almost 60A at 225'. Even at a full 60A the VD is NOT severe enough to even worry about.
    So use the #4, but don't limit yourself at the same time. Take advantage of the larger wire.

    What will you be using out there?

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