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Subpanel i want to run a 40 amp subpanel to a barn 430 feet away. can you give me a step by step?

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  • bealls4 Oct 24, 2008

    The panel will be used for lighting and duplex receptacles. I will be running triplex from pole to pole. Do i have to use a double pole breaker in the main if the subpanel is a main lug panel w/o main disconnect?

  • butch welch May 11, 2010

    My friends (electricians) and I had fun with you problem. We use electrician calculator, the ugly book and the code book to solve this. I guess we need to know what size wire you are planning to run. Yes you will need a double pole breaker at the main and a new ground rod at the barn.

  • butch welch May 11, 2010

    What will you be using this panel for. Are you running the wires above or below ground.

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YOU WILL NEED A 2 POLE @ THE HOME PANEL AND ANOTHER @ THE BARN PLUG THE ONE @ THE HOUSE AS YOU NORMALLY. WOULD PLUG THE ONE @ THE BARN ONTO THE BUSS IN THE MLO PANEL AS IF IT WERE TO BE A FEEDER BUT INSTEAD PUT THE 2 PHASE WIRES ON IT , THIS WAY YOU WILL HAVE A MEANS OF DIS-CONNECT AT THE BARN AS WELL, YOU WILL STILL NEED A GROUND ROD @ THE BARN TO GND THE MLO PANEL AND ALL RECPT SHOULD BE GFCI RATED FOR SAFETY AS FAR AS THE WIRE SIZE DONT KNOW LOAD , BUT A GUESS WOULD BE A # 4 COPPER TRI OR A # 2 ALUM SHOULD HANDLE WHAT YOUR GOING TO DO , JUST A GUESS .

Posted on Nov 23, 2008

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