mkgrady
Senior Member
- Location
- Massachusetts
AHJ informed me that I missed a bond bushing between a MCB panel and a transfer switch.
I ran a metal offset nipple from a punched hole in the ats to an eccentric ko in the panel. He told me because some of the larger KO's remain in place I need the bond bushing. I responded that the KO's are eccentric and the lock nut is connected to can and not just the concentric rings. He responded that both concentric and eccentric KO's require a bond bushing. Is that true? If it is true, would adding an egc satisfy the requirement?
This makes me question whether or not running metal conduit anywhere while utilizing concentric KO's is compliant.
I ran a metal offset nipple from a punched hole in the ats to an eccentric ko in the panel. He told me because some of the larger KO's remain in place I need the bond bushing. I responded that the KO's are eccentric and the lock nut is connected to can and not just the concentric rings. He responded that both concentric and eccentric KO's require a bond bushing. Is that true? If it is true, would adding an egc satisfy the requirement?
This makes me question whether or not running metal conduit anywhere while utilizing concentric KO's is compliant.