I'd think the reason it's against the NEC is to avoid surprises during infrequent residential servicing.
You could do the same thing outside of the wall though. But if you're tying the grounds together and feeding equipment that has its own transformer, I don't see much of a point.
I'd also think the FDA safety rules would require it for its failure modes, not power quality. Actual patient isolation is taken care of by the devices themselves.
You could do the same thing outside of the wall though. But if you're tying the grounds together and feeding equipment that has its own transformer, I don't see much of a point.
I'd also think the FDA safety rules would require it for its failure modes, not power quality. Actual patient isolation is taken care of by the devices themselves.