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

    Dec 4, 2011, 05:29 AM
    Wire size for 20 amp at 300 ft?
    What size wire should be used to wire up a boat lift that needs 240 20 amp that is 300 ft away from source. Will be in pipe above ground.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Dec 4, 2011, 05:56 AM
    Using your values I did a voltage drop calculation here:

    Voltage Drop Calculator

    and arrived at #6 copper:
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