T-Wragg
Senior Member
- Location
- Paradise, California, USA
- Occupation
- Electrical Contractor
I am running EMT from the main service panel to a sub-panel. I am entering the sub-panel through concentric knockouts. An equipment grounding conductor is also installed in the conduit for attachment to a ground bar in the sub-panel. Does the code always require a ground bushing installed when an enclosure is entered with a metal raceway through concentric knockouts? I am in California and we are using the 2008 NEC.