Can someone please explain the requirements and use of ‘spacers’ at electrical outlet boxes? My understanding is that in certain instances a trim ring or extender of sorts may be needed at a j-box, that is recessed too much into the wall, to maintain the gap (1/4"??) caused by that recessing of the box and the cover plate. Now, certainly that would seem like it would be outside the scope of a typical home inspection to even think about something like that but, trust me, I have ulterior motives for understanding this concept better. If what I’m asking is not clear to you then that’s OK, I probably don’t need to know that (Bob), perhaps only the sparkies will now what I’m referring to and can explain it. Are there any sparkies left on the message board?
Note: I think I have subsequently found the answer to my question and would delete this post if it allowed me to.