NEC requirement on depth of mud rings in gyp board
NEC requirement on depth of mud rings in gyp board
(OP)
What is the NEC requirement for the depth of mud rings on outlet/switch box's? In other words, how far back from the face of the Gyp Board can the mud ring be?





RE: NEC requirement on depth of mud rings in gyp board
Mike
RE: NEC requirement on depth of mud rings in gyp board
And no, you're not being rude Mike. Thanks
RE: NEC requirement on depth of mud rings in gyp board
Mike
RE: NEC requirement on depth of mud rings in gyp board
I did a code search for you, and the NEC does require that the mud-ring not be further back than 1/4" from the finished surface. My bad. Check code section 314.20.
Mike
RE: NEC requirement on depth of mud rings in gyp board
Mike
RE: NEC requirement on depth of mud rings in gyp board
RE: NEC requirement on depth of mud rings in gyp board
RE: NEC requirement on depth of mud rings in gyp board
I have seen contractors use 1/2" extension rings with 5/8 wall board and claim it was ok because it was within an 1/8 inch. The job was kicked over as it should have been and they were told to use the right rings. One part of the electrical inspection should have been made before the gypboard went up. If it was caught then it should have been flagged. Someone using the wrong rings is doing something wrong and probably more than just wrong rings. If I were inspecting the job I would start watching the guy like a hawk. I would cost him more money than he saved by using the rings he had in back of his truck or whatever.
If you have a gap it makes it easy for someone to take a piece of wire and push it between the faceplate and the box. Of course that kind of thing never happens.
RE: NEC requirement on depth of mud rings in gyp board
If you're on a ship or aircraft or something exotic, then all bets are off, though, and it usually ends up at an authorizing engineer's discretion to do whatever he feels like.
RE: NEC requirement on depth of mud rings in gyp board
Thanks again, and have a great Xmas!