Grounding rod for subpanel.


Old 09-27-10, 07:27 PM
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Grounding rod for subpanel.

Hello, thanks for you help in advance. I've seen different threads saying that if you have a subpanel in a separate building, then you should have a grounding rod for that subpanel. Other responses have said that emphatically, do NOT have a grounding rod for a subpanel in a distant building. Is it optional or should you always rely on the main panel ground? Thanks.
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Old 09-27-10, 07:31 PM
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Ground rod required per 2008 NEC 250.32. Ground rod is seperate from the one going from main panel to sub.
Old 09-27-10, 08:05 PM
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Here are some pictures to help:
Old 09-28-10, 09:26 AM
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A subpanel in an outbuilding always requires a grounding electrode system, which is usually one or two ground rods with brass acorn clamps attached to the subpanel ground bus with #6 copper wire.

A single circuit (no panel) to an outbuilding does not require a GES.
Old 09-28-10, 07:13 PM
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Thanks, the pictures help to clear it up

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