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    Fatback1977's Avatar
    Fatback1977 Posts: 1, Reputation: 1
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    #1

    Sep 5, 2013, 08:22 AM
    600 amp service
    What size wire do I need for a 600amp /3 phase service?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
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    #2

    Sep 5, 2013, 09:44 AM
    Assuming you are in the US, you could use one set of 1250 kCM copper or two sets of 300 kCM copper or three sets of #3/0 copper...
    The above taken from NEC Table 310.15(B)(16).
    Be aware you may need to make adjustments if you are traveling a large distance or if you are in a high ambient temperature environment or when using multiple sets of cables you install them underground.

    And you thought this was a simple question!
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