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cliff notes: Is there any code prohibiting the bare ground as part of romex inside a wall as an equipment ground?

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"...PV system, utilizing SMA 5000 and SMA 7000 inverters...route all my wiring from the inverters to my service panel inside the wall...use romex for that portion of the wiring

electrical path: conductors from each inverter to a 100 amp combiner subpanel, then to the AC disconnect, and finally to the service panel. My romex from the combiner subpanel to the AC disconnect to the service panel is 4-3 with ground (okay, perhaps a little overkill).

question: someone told me the ground I run from the subpanel to the AC disconnect and then to the service panel has to be either THHN or THWN, that I cannot use the bare ground wire provided in the 4-3 WG."


This edited quote is from a solar forum. I said I'd post in an electrical forum because someone asked me to. The wiring in question is on the AC side and I'm sure (99.9% anyway) that this being part of a solar system would have no impact on whether the wire is required to be jacketed. I'm also pretty sure that there is no such requirement anywhere in the NEC.
 

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Hey, it's a joke. Can't take a little joke Ampie?

I would never diss you, you posts are always straight forward, and seemingly correct.
 
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