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    notlob55's Avatar
    notlob55 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 5, 2007, 02:40 PM
    Power To An Outbuilding
    I have a barn that is 300 feet from my house & I want to install 4 or 5 lights plus a power outlet.
    What size wire & breaker would I need to do this in a satisfactory / safe manner.

    Many Thanks
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Nov 5, 2007, 03:10 PM
    TKrussel will likely give you the best answer so I'll sit back and wait. My advice would be to install a sub panel in the barn and run separate lighting and outlet circuits from the panel. What do you plan to plug into the outlet, anything like a heater or compressor?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
    		  
    #3

    Nov 5, 2007, 04:08 PM
    #2 aluminum will allow 40 amps for just over the recommended max of 5% volts dropped.

    #4/0 will give 100 amps for just under.

    Price the two and compare. For 120 volts only ,ask for 3 wire URD cable, for 120/240 volts ask for 4 wire.

    You can bury it in sand 6 " above and below, for extra protection you can use 4" DB PVC conduit.

    If not sure about grounding, ask.
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