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epalonia

08:27PM | 06/18/07
Member Since: 06/18/07
2 lifetime posts
Bvelectrical
I've browsed through the forums and have found some good information regarding wiring sizes and conduit to a shed. However I have not found my specific situation.

I recently gutted my guest room to make way for a new baby nursery. I realized at this point I have a 220 Volt outlet in the room. It's an older house, so I suppose it was used for a window A/C unit at some point. Anyway, it's got a double pole breaker in my main panel. The outlet is on the outside wall close to my shed. About 70 feet away. My question is, could I simply continue that line and run it to a sub panel at my shed and then break it off into two 20 amp 110 volt breakers? I only plan on adding some lighting, a TV, and an outlet for a blower/trimmer outside the shed. I also plan on using tools, however, none will be anything huge. Just a circular saw, drill, pancake compressor, jigsaw, etc...

Is this the right way of powering the shed? Or should I replace the double pole that is in my main box with two 110 volt breakers. The 220Volt outlet has three wires. One black, one red, and one white. Thanks in advance for any advice you can provide!!

Billhart

10:34AM | 06/19/07
Member Since: 04/25/05
1915 lifetime posts
I am not sure what that receptacle was used for, but was not wired properly for a window AC.

Bur for what you want to do it requires 4 wires. 2 hots, neutral, and ground.

If you want to do this you have to run new wires from the panel.

This is called a multiwire circuit and can be split into 2 120 circuits or you can run a larger feeder and use a sub-panel.

But you are only allowed to run one circuit to a detached building. It can be a multi-wire or a feeder to a sub-panel or it ity can be a SINGLE 120 volt circuit.

doug seibert

10:54AM | 06/19/07
Member Since: 08/10/02
842 lifetime posts
My 18,000 btu window air uses a standard NEMA 6-15 plug......three wires H/H/G.....15 amps

I agree they need a new feed from the panel........

"...measure once.....cut twice....throw that one away and cut a new one...."

epalonia

03:00PM | 06/19/07
Member Since: 06/18/07
2 lifetime posts
Thank you both very much. I suppose running a new line from the panel won't be any more difficult than running one from the existing outlet. I did not know about running only one line to a detached building, so thank you very much for pointing that out. It sounds like I should run one line out to a subpanel at the shed to take full advantage of the spots I can free up in the main panel. Thanks again for your responses, any other information is welcome!
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