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    money pit worker's Avatar
    money pit worker Posts: 1, Reputation: 1
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    #1

    Jul 29, 2006, 03:14 PM
    Service entrance cable
    Having new 100amp meter installed professionally,but I am burying wire to the building which is 125' from where meter is mounted. Will I have to upsize the size of wire because of the distance? I also intend to enclose in conduit, so I'm not worried about using "U" coded wire
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Jul 29, 2006, 03:27 PM
    For a 100 amp service at this length I would use #2 copper or #1 aluminum.
    If using continuous conduit, you can use THWN or XHHW insulation.
    Riders3627's Avatar
    Riders3627 Posts: 6, Reputation: 1
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    #3

    Jan 11, 2012, 05:31 PM
    2*k*i*l/cmil that is the formula for Voltage Drop

    2 Being the common
    K Being the type wire you are using (12.9 Copper 22.4 AL)
    I For ampacity (How many amps to deliver)
    L Length of the wire being pulled ( be sure to measure the route of the wire)
    Cmil is the size of the wire being used located in the back of the NEC in Annex C
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