Common and ground under same screw in panel?


Old 05-21-05, 09:11 PM
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Question Common and ground under same screw in panel?


This forum has been invaluable as I finished my basement. Electrical inspector was pleased with what he saw. He did however point out that the common and ground cannnot be under the same screw in the panel. I had followed what the original contractor had done when the house was built. I was about to change them all today, separating them out/doubling them up as needed, but I realize that every one is done with the common/ground together. I haven't found it in the code and wondering what others know about it. Thanks for the help in advance.
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Old 05-21-05, 11:45 PM
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It's a clear code violation. Fix it. It will only take a few minutes.

See Article 408.41 "Each grounded conductor shall terminate within the panelboard in an individual terminal that is not also used for another conductor."

Note that in NEC lingo, "grounded conductor" is the white wire.
Old 05-22-05, 07:25 AM
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Most panels are listed for _two_ wires under each screw, but as John pointed out, you can only have one _neutral_ under each screw. If your panel is appropriately listed (see the label), then you can put two _ground_ wires under each screw.


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