A listed ex-posed work cover shall be permitted to be the grounding
and bonding means when (1) the device is attached to the
cover with at least two fasteners that are permanent (such
as a rivet) or have a thread locking or screw or nut locking
means and (2) when the cover mounting holes are located
on a flat non-raised portion of the cover.
When I read this I assumed it meant I could forego attaching an egc to the receptacle.
Its advantage being speed and material in a run using conduit as the equipment grounding system.
So, I would use the cover to bond the outlet from the grounded box.
But, could it also be used to ground a metal box in a system that uses a conductor attached to the receptacle; using the cover to bond the box to the grounded outlet, eliminating the need to run the egc to the box?
An example, a garage with open stud bays using 4” square boxes and nm-b with it egc attached to the outlet.
and bonding means when (1) the device is attached to the
cover with at least two fasteners that are permanent (such
as a rivet) or have a thread locking or screw or nut locking
means and (2) when the cover mounting holes are located
on a flat non-raised portion of the cover.
When I read this I assumed it meant I could forego attaching an egc to the receptacle.
Its advantage being speed and material in a run using conduit as the equipment grounding system.
So, I would use the cover to bond the outlet from the grounded box.
But, could it also be used to ground a metal box in a system that uses a conductor attached to the receptacle; using the cover to bond the box to the grounded outlet, eliminating the need to run the egc to the box?
An example, a garage with open stud bays using 4” square boxes and nm-b with it egc attached to the outlet.
