I bought this to help figure out the breaker wirings during my generator transfer switch home project. This product worked exactly as it should. I was able to identify which breakers supplied which outlets. It saved many future trial-and-errors in guessing this information.
Finding the correct breaker is now a snap!
By myself, I was able to trace every outlet and every overhead light in my house. 30 circuits in all. Using the sending unit that is also a circuit checker, I found an open ground that had bit me about a week ago when i was tracing a line of armored cable. Now I have a nice grid listing all the circuits and all the crazy ways that other owners have tapped into wires for additional runs.
Wow is this a nice tool to have. I always found that most panels are poorly labeled, or a device has been added and is pulling power from somewhere strange. This tool takes out all the guess work and makes jobs way more concise.
Does what it is supposed to do. I was able to map all of the circuits in my home in about 30 minutes