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Old 01-06-2012, 11:17 AM   #1
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UF wire to small garden shed


I want to direct bury some 12-2 feeder wire to a small garden shed just for lighting. I have an outside outlet box on the back of my house that I would like to run the power wire to. I plan on running conduit down from the outside recepticle underground about a foot. I could run the power to my fuse box in the basement but I am limited on adding extra breakers. Is it OK to tap into the outside electrical receptical to supply power to my shed?

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Old 01-06-2012, 11:32 AM   #2
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UF wire to small garden shed


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Originally Posted by hartkem View Post
Is it OK to tap into the outside electrical receptacle to supply power to my shed?
Yes. As long as you follow the correct burial depths. Protecting the cable above ground like you mention is also very important.
Remember. This circuit is limited as to the breaker and wire size existing. You must be certain the outside box contains #12 wire and is fed with a 20 amp breaker to expect a 20 amp circuit. If the wire or the breaker are rated for 15 amp, 15 amp is what you will have including the other loads on this circuit.

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Old 01-06-2012, 11:37 AM   #3
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UF wire to small garden shed


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Originally Posted by hartkem View Post
I want to direct bury some 12-2 feeder wire to a small garden shed...
You don't need pipe. The GP circuit for your shed can be achieved with an underground romex type wire (called "UF"). You'll still have to make a narrow trench though.

Quote:
Is it OK to tap into the outside electrical receptical to supply power to my shed?
Depends on how that receptacle is set up and where it gets power from.
Ideally... it is part of a 20A GFI protected circuit. If so, you're golden.

If not, then you should plan to go to an existing 20A GFI protected circuit...
or back to the panel and start a new one.

hth
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Old 01-06-2012, 12:48 PM   #4
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UF wire to small garden shed


Thanks guys for you help. I will confirm it is a 20 amp circuit and go from there. What is the minimum depth for 20 amp UF wire.
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Old 01-06-2012, 01:17 PM   #5
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UF wire to small garden shed


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Originally Posted by hartkem View Post
What is the minimum depth for 20 amp UF wire.
Quote:
Originally Posted by NEC
Residential branch circuits rated 20 amps or less at 120 volts or less and with GFCI protection at their source are allowed a minimum cover of 12”.
Conveniently for you... that is about the distance from the tip of a pick to where the handle will bind up.
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Old 01-06-2012, 01:22 PM   #6
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UF wire to small garden shed


You need conduit when it goes above the ground to the box to protect it. Can you put the UF in conduit? Absolutly. There is nothing wrong with a little protection. But you will have a hard time pulling all the way through unless you use like 2" conduit.
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Old 01-06-2012, 02:06 PM   #7
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UF wire to small garden shed


Direct burial cable depth - 24"; in PVC conduit - 18"; 120V 20A or less, protected by a GFCI circuit - 12".

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