On April 5, 2021 at 11:56, Ernie Gilman said...
There are several panels. This place is open 24 hours a day and it will not be acceptable to go flipping breakers. That would make the boss go flipping bonkers.
Do it live... If you are only adding a 15A receptacle what's a little tingle on your hand (I am kidding by the way, no one should work on live electrical even if it's only a 15A circuit)? Tell the "boss" that he needs to get someone to locate the circuit so you can safely work on it or you are just going to flip breakers until you find it. You know what that person will do? Flip breakers until they find it and put some dumb label on it.
The only tracer I know of is what KOT had provided and is NOT a DIY product. Our one electrician has it and it's a huge time saver when going into renovations/older homes that have panels with 10 labels of "receptacles".
If you felt comfortable enough you could tie the black and white directly onto the receptacle portion and trace the wire that way. outside of that you are flipping breakers or shorting the wires to trip the breaker.
