Long Electrical Run


Old 08-01-06, 05:47 AM
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Long Electrical Run

Hey Folks...
Just had a shed built about 375 feet from the breaker box. I want to run electricity to it. I just want to have a four outlets for power tools and one for a small refrigerator. What size wire do I need for this? Thanks in advance....
Mike D.
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Old 08-01-06, 05:58 AM
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
That distance is rather long.

The answer to your question depends on the amount of power you want. If you want to get 20 amps at the shed, then you will need #4 wire, or perhaps even #2. If you want only 15 amps then you can probably get away with as small as #6.

If you decide to go ahead with this, I recommend conduit and individual conductors, and I recommend running two hots so that you can balance any load and further reduce voltage drop.
Old 08-01-06, 06:59 AM
Join Date: Apr 2006
Location: New Bern, NC
Posts: 1,623
This is a link to an online voltage drop calculator.

1/2 the circuit length is the one way distance from panel to rec. so use the 375 that you stated in your OP.

The total circuit length would include the trip back to the main panel.

Try to keep your voltage drop below 5 percent.

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