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Old 02-17-2009, 05:50 AM   #1
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Detached shed wiring


I have a shed, approx. 100' from my house. The electric I plan to run to it will be running a few lights, a couple shop tools, and possibly a window AC unit or space heater. Do I need a subpanel in the shed, or can I just run a couple circuits from my main house panel?
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Old 02-17-2009, 06:08 AM   #2
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Detached shed wiring


You need a subpanel. From the sound of what have already planned, this will end up being more than one circuit.
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Old 02-17-2009, 03:13 PM   #3
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Detached shed wiring


You CAN run two circuits (max) but for the little added expense , I would put in a sub panel. Electricians generally overkill everthing because we are always being asked to add more power.

30 amp sub on #10 wire= minimum.

50 amp sub on #8 wire= better

60 amp sub on #6 wire= best

4 wire system. 2 hots, 1 neutral, 1 ground, 1 ground rod w/#6 to sub. Neutral bus isolated from panel enclosure, ground bus attached to enclosure.


If you do decide just to go with 2 circuits, use #10 wire minimum for the feed. 100" is a long run and you want your power tools to operate properly..

Last edited by 220/221; 02-17-2009 at 03:17 PM.
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Old 02-17-2009, 04:32 PM   #4
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Detached shed wiring


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Originally Posted by 220/221 View Post
You CAN run two circuits (max) but for the little added expense , I would put in a sub panel. Electricians generally overkill everthing because we are always being asked to add more power.

30 amp sub on #10 wire= minimum.

50 amp sub on #8 wire= better

60 amp sub on #6 wire= best

4 wire system. 2 hots, 1 neutral, 1 ground, 1 ground rod w/#6 to sub. Neutral bus isolated from panel enclosure, ground bus attached to enclosure.


If you do decide just to go with 2 circuits, use #10 wire minimum for the feed. 100" is a long run and you want your power tools to operate properly..
I just did a 30A sub for my parrents garage exactly as described here. I used a small square d panel I had laying around. It was a 6 position panel. I installed a 60A breaker and a hold down. Then installed 2 other breakers to feed the garage.

The panels like the one I used are about $15 - $20 plus breakers. You will have to put in a ground bar and a breaker hold down.

I would install larger than 30A for a garage / shed that tools will be used in.

Jamie
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