usually i tape my devices.. if its a duplex rec or a switch in a 1900 box with a single mud ring on, i wont tape it, but when theres like a bank of switches or rec's (from 2 on up) ill wrap a ring of tape around em... when you have to work on it later, its real fun to have 5 devices out and having the screw tabs hit the other screws... i also tape when putting any device in a 180 box, or a gem box, just for safety.. if i have to go back in, i wanna be sure im protected, i have to work it live a lot
-m
