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Old 01-25-2010, 02:35 PM   #1
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main panel bus bar question


I understand that for the main point of entry panel, the neutral and ground are combined on the same buss bar. Sub-panels, on the other hand have the neutral and ground wires on separated bus bars and a new ground needs to be installed for the sub-panel. Just wanted to confirm this is correct, as I replaced a breaker on my main POE panel and saw the ground and neutral combined on the buss bar.

Thanks, JC
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Old 01-25-2010, 02:53 PM   #2
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Quote:
Originally Posted by 205bhamjim View Post
I understand that for the main point of entry panel, the neutral and ground are combined on the same buss bar. Sub-panels, on the other hand have the neutral and ground wires on separated bus bars and a new ground needs to be installed for the sub-panel. Just wanted to confirm this is correct, as I replaced a breaker on my main POE panel and saw the ground and neutral combined on the buss bar.

Thanks, JC
At the 1st disconnect the grounds & neutrals can share & are bonded to the case
This is not always the Main panel

Subs they are kept seperate & neutral bar is isolated from the case
Subs need 4 wires run from the main panel
A sub in a detached building must also have ground rods



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