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    ALLEN493's Avatar
    ALLEN493 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 21, 2011, 02:18 PM
    Free electrical answers?
    I have a number 12 copper coated wire from house it gose 300 feet the panel in house supplies 120 volts it is to power a 1200 watt saw what would be my approximete voltage to the saw
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #2

    Nov 21, 2011, 07:37 PM
    "Coated?" What type cable are you using. If you are using #12 AWG, type UF, then you will get 96 volts at the receptacle.

    If you are going +/- 300 ft. then you should be using a #4/2, Type copper THHW.

    Be aware that there is a requirement that the end to end Percentage of Voltage Drop of 5%
    Goodneighbor's Avatar
    Goodneighbor Posts: 4, Reputation: 2
    New Member
    		  
    #3

    Dec 1, 2011, 04:44 PM
    Line loss on 12 gauge wire at 300' would be about 14 volts. About 11.5% drop.
    So you will get about 106 volts to your saw.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #4

    Dec 1, 2011, 04:52 PM
    Quote Originally Posted by donf View Post

    Be aware that there is a requirement that the end to end Percentage of Voltage Drop of 5%
    Point of clarification.
    There is an NEC suggestion to keep VD to a tolerable level. It is not an NEC requirement.
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