said by Hellrazor:Thats an interesting quote since the IBEW electrician, with about 40 years of commercial/industrial experience, we used at work 10 years ago did this on every outlet or switch he worked on. Mostly because he did everything hot and made it impossible to short things out against the box when installing or removing something.
Ditto. I've seen many licensed electricians (usually union on commercial jobs) tape over the terminals. I worked in a large building in the 80s which was completely re-wired in this way. One of the guys had originally wired the building when it was built in the late 40s using solder-and-tape for splices.
Working hot sometimes, and as explained to me, a safeguard when using stranded wire, in case a stray strand pokes out, or in case a strand is nicked and breaks on insertion.
It may be UL listed but as already mentioned I would be uncomfortable using this with
steel boxes or steel mud rings. Yes, the power should be shut off before removing the cover plate, but we all know that isn't necessarily the case all the time.
For example, local codes here do not require a license or permit to remove and replace a cover plate. Think about painters, amateur and professional. That's probably a million cover plates removed every day. Who wants to be responsible for that claim just for the sake of a little light?