I have a question for the electricians here please. I recently purchased an abandoned gas station / car wash. It has been empty for at least 10 years. I am going to convert it to a different use, and I want to strip out all of the fixtures in wiring related to the gas pumping operation and convenience store coolers and equipment. But I want to keep the lighting and outlets and furnace, well pump, and the essential wiring in place. There is four or five different panels, and wires everywhere. The electrical power lines from the pole to the building have been cut off, so there is absolutely no power to the building at this point.

So what kind of apparatus can I use to most easily identify the circuit breakers and wires that lead to the essential fixtures, and which ones lead to the stuff that I want to rip out?

My plan is to get the demo done without the use of the electrician, then get a licensed electrician in to make any needed reconnections before getting the power hooked up again. I can run a generator or something to have some temporary lighting in there, but I'm looking for something, possibly battery-powered, that can allow me to trace circuits. Thanks, Joel