Correct grounding of metal junction box w/splices for 3 circuits
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Correct grounding of metal junction box w/splices for 3 circuits
I spent half an hour reading Article 250 but didn't see multiple circuits specifically addressed.
I have 3 circuits (microwave, disposal, and dishwasher) entering a metal box where the THHN wire will be spliced to Romex.
To ground the box, do I just need to pigtail off of one circuit's ground wire and attach to the box, or do I pigtail all 3 circuits' ground wires together?
The conduit is metal, which I believe is sufficient for grounding, but I don't trust the fittings' set screws.
I have 3 circuits (microwave, disposal, and dishwasher) entering a metal box where the THHN wire will be spliced to Romex.
To ground the box, do I just need to pigtail off of one circuit's ground wire and attach to the box, or do I pigtail all 3 circuits' ground wires together?
The conduit is metal, which I believe is sufficient for grounding, but I don't trust the fittings' set screws.