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Old 07-24-2012, 12:57 PM   #1
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Grounding multi-circuits in multi-gang box


Are the grounding conductors to remain separate for each circuit within a multi-gang box (plastic) to avoid creating ground loops? Or grounding conductors should all be tied together within any enclosure regardless of whether they serve separate circuits, and despite being tied together at the ground bar in the service panel?

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Old 07-24-2012, 03:16 PM   #2
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Grounding multi-circuits in multi-gang box


All of the ground wires are tied together. With additional short lengths (pigtails) to devices (switches, receptacles) in the box and to the box itself if metal.

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Old 07-24-2012, 05:11 PM   #3
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Grounding multi-circuits in multi-gang box


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Originally Posted by sixspeed View Post
Are the grounding conductors to remain separate for each circuit within a multi-gang box (plastic) to avoid creating ground loops? Or grounding conductors should all be tied together within any enclosure regardless of whether they serve separate circuits, and despite being tied together at the ground bar in the service panel?
That is NOT how ground loops are formed... And you need to splice all the grounding conductors together and bond the devices.
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