Bonding rigid conduit using NEMA 4X poly-carb boxes

[Raptor1963]

I have a system that is using NEMA 4X poly-carb boxes w/ rigid conduit. We have used grounding bushing on all conduits and bonded them together in each pull box. The bonding back to the panelboard is done only through the rigid conduit system. Do the grounding bushing need to have a dedicated ground wire ran back to the panelboard or is the conduit suffucient??

 

[petersonra]

IMO as long as the bonding wire used to connect between the wire segments is adequately sized, you are OK.

personally, i would run an EGC inside the conduit.