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Old 07-11-2008, 12:31 AM   #1
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Wiring a well pump in the shed


I just installed a 230v well pump in my shed that's located about 50 ft behind my house. I plan to run 10-2 from a 30 amp breaker in my garage.

Do I need to install a ground rod at the shed, should there be a GFI?

Also, I recently noticed the sub panel in my detached garage has the neutral and ground bridged. Should the garage have it's own ground rod as well? After reading thru a few posts i'm thinking the ground and neutral need to be separated. What problems could this cause, if any?


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Old 07-11-2008, 11:48 AM   #2
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Wiring a well pump in the shed


A few updates after going thru old posts.

-My shed question pertains to a branch circuit from the garage.
-The garage is 12 feet from the house.
-garage has a 100 amp sub panel
-There are no metallic connections between house and garage except for the feeder.
-The shed will never need 110v, so no need for a sub panel. Just 230v for the pump
-I've owned this home for a few years. I do a lot of work out in the garage. (welder, compressor, all kinds of power tools) I've had no problems with the way it's wired. Am I lucky? The wiring looks professional, very neat, clean and tidy.
-the garage has open studs, so it's very easy to make changes to the wiring.

I plan to wire the well pump sometime this weekend, any comments before i tackle this will be apprciated.

I can take a few pics if needed.


Last edited by diyjet52; 07-11-2008 at 11:51 AM.
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Old 07-11-2008, 12:09 PM   #3
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Wiring a well pump in the shed


A single 240V branch circuit to the shed would not require a GFCI or a ground rod.

The detached garage should have a ground rod, whether fed with three wires or four.
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Old 07-11-2008, 12:18 PM   #4
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Wiring a well pump in the shed


Quote:
Originally Posted by HouseHelper View Post
A single 240V branch circuit to the shed would not require a GFCI or a ground rod.

The detached garage should have a ground rod, whether fed with three wires or four.

Thanks for replying, i've been checking this thread every 5 mins for advice.

So I'm good to use 10-2 for the pump?

Should I isolate the ground and neutral after installing a ground rod in the garage?

The garage feeder has 2 hots, a neutral and a ground.
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Old 07-11-2008, 12:26 PM   #5
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Wiring a well pump in the shed


The 10/2 is correct for a 240V 30A circuit.

If the garage is fed by four wires (H,H,N,G), then the neutral bus should be isolated from the ground bus and the panel enclosure. All white wires should go to the neutral and all bare/green wires should go to the ground.
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Old 07-11-2008, 12:39 PM   #6
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Wiring a well pump in the shed


Quote:
Originally Posted by HouseHelper View Post
The 10/2 is correct for a 240V 30A circuit.

If the garage is fed by four wires (H,H,N,G), then the neutral bus should be isolated from the ground bus and the panel enclosure. All white wires should go to the neutral and all bare/green wires should go to the ground.

You've answered all my questions,

Thankyou very much.

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