Looking for clarification from our electrical experts on the following.
The subject house is a 1980 home which also has a detached outbuilding (garage/ shop)
Home has a newer 200 amp main service panel.
Detached accessory outbuilding has a distribution panel, 60 amps, 240 VAC.
I have deferred the inspection of the distribution panel to an electrician because the neutral is not floating, as can be seen in the photo.
My question is are there any exceptions that I may have missed, that might allow this configuration.
The reason I ask is that I found an exception in my code check electrical that might apply. But I am not certain that I have interpreted it correctly.
It first says that;
EGC (4 wire feeder) is required between bldgs.EXC …(=exception)
The exception is;
No EGC OK if no continous metal path between buildings.
References are to the NEC 99 and 2002 250.32B1 and 250.32B2
(don’t worry…I don’t quote codes…and these probably don’t necessarily apply…I get that…)
I have always deferred these 3 wire distribution panels with common neutral/grounds…and I never get any feedback saying anything contrary to what I reported. As far as I know the electrician makes repairs.
Oh…and there is no continous metal path (i.e. water line) between these structures.
I just wanted to put this out there for discussion to see if I there is some thing(s) I am not aware of.