In alt.home.repair, on Fri, 2 Aug 2019 14:32:59 -0400, Ralph Mowery
wrote:

In article ,
says...

They have testers to locate breakers, where you plug a widget into the
receptacle and it injects a signal that the handheld tester then can
sniff at the panel.



Interesting. Never heard of this. Will research it. Thanks much!




I don't know how well this one will work, but here is an example.

https://www.lowes.com/pd/Southwire-A...-Gfci/50133086


I want one. I wish I had a use for it.