Hello Bob
This is good, we can hash this out, and be able to help each other out here.
About the exception: I believe this exception is trying to deal with 250.148, in a sense as to the extent that the IG is not required to be connected to the EGC, for obvious reasons, that I know you know.(that was hard for me to put in words, if it does not make sense to you, I will try to put it in other words, let me know)
I am not at all against using a ground bar, in a large enough jbox, and actually have, if you do want to connect them all together.
BTW - I am not against connecting All the EGC together, I just do not think this section is making it required.
I also run 1 EGC in a raceway sometimes when the bidding process makes that necessary, But... if I can I like to run individual EGC's
In a metal residential switch box I would probably splice them all together, only because there probably will not be too many.
Not trying to be a pain, but answering how I would do it, so as to see what you would do.
Pierre
