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    dan wojack's Avatar
    dan wojack Posts: 3, Reputation: 1
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    #1

    Sep 24, 2012, 01:07 PM
    200 amp run 320' what size cable needed
    I want to run an additional 200 amp out of a Milbank u3849-0-2/200 pedestal with breakers .At the present time I’m running 200 into the house. Now I want to tap the additional 200 breaker and run it 320' out to a barn. I was originally thinking of using 350/350/4/0 for the run, but I’m concerned about 4% line dropage and I want to maintain a full 200 amp at the new panel 320' from the feed at the pedestal .I would think about overseeing the wire to maintain it. Any suggestions on what size I should go to for maintaining the full load. Thanks.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Sep 24, 2012, 01:35 PM
    Do you honestly need a full 200A at the barn? What kind of continuous loads are you looking at?
    dan wojack's Avatar
    dan wojack Posts: 3, Reputation: 1
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    #3

    Sep 24, 2012, 01:50 PM
    It will be for arena lighting and also to run future out building off it.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
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    #4

    Sep 24, 2012, 02:00 PM
    This really does not tell me anything about what the load will be. Arena lighting could mean 2000 watts, or 20,000 watts.

    And future outbuilding could mean a 60 watt light bulb or a full on machine shop.


    So will you really need the full 200A?
    dan wojack's Avatar
    dan wojack Posts: 3, Reputation: 1
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    #5

    Sep 24, 2012, 02:04 PM
    Yes
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #6

    Sep 24, 2012, 02:15 PM
    Assuming a mostly balanced load:
    400mcm AL, or 250mcm CU.
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