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

    Dec 29, 2007, 12:04 PM
    Feeder Voltage Drop calculation
    I have a 200 Amp Electrical Service and I would like to install a 60 Amp Sub Panel in a building 300 feet away. I will have 120 volt and 240 volts loads at the building. To calculate the size of the feeder to the building, do I use 120 volts or 240 volts in my voltage drop calculations?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Dec 29, 2007, 01:34 PM
    Either, as both need to be within no more than 5% less of nominal at the end of the circuit fully loaded.
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