Hello all. First, I hope everyone here had a nice and relaxing labor day weekend! My wife and I went to visit her parents for the day and, of course, overeat. [Linked Image]

While we were there, I took a look at some wiring for an addition that was being built onto their house. The licensed electrician doing the job used a strange combination of single, two and three gang romex boxes (with the integral clamps in the back) and boxes with only 1/2" KO's. What immediately caught my eye about the KO boxes was that the romex clamps used to secure the wires were installed WITH THE CLAMP INSIDE THE BOX, not on the outside, the way I always thought it was supposed to be done. Besides taking up a lot of room inside the box that could better be used by wires and switch/receptacle bodies, is there any sort of code reference which does not allow this sort of thing?

I would think that, besides just looking really weird, there might be an issue of the sharp edges of the clamp damaging the wire insulation.

Have any of y'all ever run into this kind of thing before? I can't think of any logical reason for anyone (especially a licensed sparky) to do this.

Mike (mamills)