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Discuss Correct grounding of metal junction box w/splices for 3 circuits in the American Professional Electrical Advice Forum area at ElectriciansForums.net

I have 3 circuits (microwave, disposal, and dishwasher) entering a metal box where the THHN wire will be spliced to Romex.

I spent half an hour reading 2020 NEC Article 250 but didn't see multiple circuits specifically addressed.

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?

In case you're wondering, the conduit is metal, which I believe is sufficient for grounding, but I don't trust all of the mechanical joints nor the fittings' set screws.
 
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Megawatt

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Reply to Correct grounding of metal junction box w/splices for 3 circuits in the American Professional Electrical Advice Forum area at ElectriciansForums.net

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