ECN Forum Forums Code Related Discussion NEC & other Code issues 314.22

What does the exception in 314.22 mean?

It mean you can come out of a box cover with a flexible wiring method without installing an extension box on it.

The cover must have mounting holes like a device cover, it can not have key hole slots or regular slots in it like a 4" sq or round blank does.

Thanks , I was looking for an out for a problem I have. We installed some plastic fs boxes in a concrete pour. Not realizing that they were putting marble on these walls . Now my fs boxes are about 1 1/2 inches back of the finshed stone. Tried using a handy box collar but it doesnt cover the whole box. About 1/8 inch gap on each side. any ideas ?

plastic goof rings

they make them to fit in a fs box

I am not a fan of plastic so I use these.



Add-A-Depth Ring

Seems like those are only good up to 1 inch. And do you have to ground them? Can you use two of them together? Questions and more questions sorry

Not sure they are listed for multi gang use.

I have never seen anyone specifically ground them.

They end up grounded by contact with the yoke.

I have heard a lot of yacking about extension rings and nobody has come up with a real reason that you couldn't gang a dozen together. Just watch your conductor length. You still need 6" at the edge of the last ring. In the ceiling of the great room of the Ca-D-Zan there are a buttload of 3" rings to get them from the box in the structural ceiling down to the finish of the antique mohogany ceiling we couldn't touch.

I've got a reason for not using a dozen extensions in an installation.

I was rewiring a beach snack bar in San Clemente a few years ago and they stacked 5 extensions into a block-and-plaster wall, with the conduit and wire coming into the deepest box. Although I agree that it may not present a safety or fire issue, I can tell you that re-pulling that wire was no day in the park.