live wire signal tracer

I'm looking for a low cost (live) line tracer (110v 20A) like an rf
signal generator and tracer. I'm looking to trace wires in live bx and
emt in apartment buildings.

Would appreciate any help with this.

Thanks

 

How about plugging in an electrically noisy item like a drill or
anything with brushes in the motor, then using a portable AM radio
tuned to a blank space on the dial as a detector. Wave the antanna at
various wires. When you get noise coming from the radio that's the
line your tool is plugged into.

 

Look in the yellow pages for a telephone internal wiring guy. They
have those things.

Good Luck!
Rich