Is this configuration for installing an additional bus acceptable?

I’ve never seen one installed in this manner before.

Looks like a piece of bus designed for grounding which means that it is not being used according to its listing. These typically mount directly to the panel enclosure for EGC connections only.

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Thanks Robert. :+1:

Maybe that’s how they fixed the double taps from the last inspection?

I doubt the AHJ would find fault.

I would fail it. that’s more dangerous than two grounded conductors under a single lug

But a #10 in a lug with 4/0 is not?

I think you like just being obtuse.

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I would fail that too. Neither this nor the OP is a serious hazard.