Bonding an enclosure with multiple circuits.

[electrofelon]

So I guess my take is that 250.148 first paragraph requires interconnecting all the EGCs of all the circuits spliced or terminated in the box (and that interconnection may use the box if it is metal, e.g. via separate ground screws), and 250.148(C) requires that at least one EGC be connected to any metal box.

Cheers, Wayne

Okay, I concur, thanks for your analysis.