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Tool Talk Discussion Forum

Re: electrical question

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Author  [Modern View]

07-24-2013 01:57:17

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The short answer is the neutral and ground are normally connected in exactly one place: at the main disconnect, which is usually close to the meter. Most main panels have a screw or jumper so you can easily tie the ground and neutral together. What you don't want to do is to create a ground loop, where ground and neutral are connected together at multiple places some distance apart. So if you're adding a subpanel to an existing main panel, don't bond the ground and neutral, but confirm they're properly grounded at the main.

As for what they did in the fifties, that was before my time. Ole John T can probably answer, I think he passed his PE back in '53.

General rule of thumb: never assume existing house wiring was done correctly. When in doubt, check with the code or a licensed electrician.

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07-25-2013 06:01:16

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 Re: electrical question in reply to MarkB_MI, 07-24-2013 01:57:17  
After re-reading John T's reply above I see where a new sub panel has the grounding bar and neutral disconnected.

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07-24-2013 20:13:28

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 Re: electrical question in reply to MarkB_MI, 07-24-2013 01:57:17  
Thanks You and John T. gave me some good advice. I did not know what a grounding loop was till you explained it. I need to check my sub panel unless they come with un-connected neutral and ground bars.

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