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Old 04-22-2009, 09:49 PM   #1
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I want to add a sub- panel in my garage from my main panel in the house, the garage is unattached and it must run over head. I want to put in a 60 amp panel, my question is do I run a neutral and ground from the house panel like a 6666 se cable or put in a separate ground rod off the sub-panel and run a 666 se cable

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Old 04-22-2009, 09:53 PM   #2
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6666 se hmm interesting

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Old 04-22-2009, 10:01 PM   #3
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First off, this applies to all new posters. Put something more than "Electrical" in the title. This is the "Electrical" forum, I sure hope it is an electrical question.

OK, first off, WHY do you have to go overhead? I hope you realize this is much more difficult than underground.

Second, there is almost 100% change that you MUST run a "4-wire" feeder to the detached garage simply to meet code. In any case it is definitely a good idea.
No matter what, a detached structure supplied with a feeder MUST have a grounding electrode installed. Typically this is a ground rod (or two). If there is a metallic water pipe feeding the building that must be used as an electrode.
With the exception of the 4-wire feeder a detached structure get's treated basically the same as the supplying main building.
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Old 04-23-2009, 12:54 PM   #4
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I'll try to do better ..... do as I would supplying the main building so I bond the Grounded and the grounding conductors in the sub -panel .
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Old 04-23-2009, 12:55 PM   #5
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I'll try to do better ..... do as I would supplying the main building so I bond the Grounded and the grounding conductors in the sub -panel
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Old 04-23-2009, 12:58 PM   #6
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How far is the garage? What loads are you going to have? You might want to consider voltage drop.

I would bury the line, aerial is much more difficult.

Ground from rods and pipe go to sub panel ground bar. You still need to run a ground to the house.

Neutrals are isolated from the frame and ground bar in a sub panel.

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