using mountig secrew for grounding

drgkjd

at couple locations, the original installer looped the ground wire around the mounting screw of the switch in stead of using the "ground screw." i have found this for both plastic as well as metal boxes.

while the contact seems to be good so the grounding is being achieved, i thought this a code violation. is it?

nap

yes it is. a ground screw is required for a ground connection

basically, if the device comes loose, the wire may not be held against the metal and you could lose your ground connection.

Now, there is such a thing as a "self grounding device" where the mounting screws into a metal box are acceptable as the EGC to the device but a wire wrapped around the screw is never acceptable.