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How much electrical power do I need to supply a newly...

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Question by Kersten
Submitted on 10/5/2003
Related FAQ: Electrical Wiring FAQ (Part 1 of 2)
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How much electrical power do I need to supply a newly dettached garage? I would like to have two outlets on three walls and one on the ceiling for the garage door opener with one outlet on the exterior.

Answer by seancs5545
Submitted on 12/12/2003
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also you might have to use either an arc fault or a ground fault breaker for the service
check the code


Answer by jtdundee
Submitted on 1/13/2004
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I've had good luck installing a 6 slot Square D subpanel in the garage, connected to a 30a/220v breaker at the homes main panel via 10ga wire.The homeowner gets 220v in the garage, and space for zoned breakers.
Most people will not need more than that.
The sub is about $15.


Answer by BillElectric
Submitted on 6/2/2004
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I agree with Jtdundee. A friend had the same question. I told him run a 30A (10 ga wire) circuit to the subpanel (6 circuits or slots) in the garage. Each duplex recpt (to NEC) is rated 180VA, so you can put 6 recpt's on one circuit (6x180=1080), the one circuit to your 1/2hp-1hp garage door opener, and GFCI exterior to the outside. (I figure dedicate the one circuit to that since you will probably put a high power device occasionally to it). You will still have 3 circuits to add more recptacles or a 220v equipment (2p). You probably have the work finished already but good luck if not.


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