"A Well moderated board that is a benevolent dictatorship, not a democracy" In business since June 16, 2010
https://www.harborfreight.com/circuit-breaker-detective-96934.htmlI bought one of these a couple yrs ago and it worked for finding which breaker was which but I don't think it will do what you if you are hunting broken wires.
walrus, do you know why they work sometimes and not others?