What is the best way to detect if two different outlets are on the same breaker? Any gadgets out there....I just bought something from Home Depot but wasn't sure if there was something out there which everyone uses
If you're dealing with what I did, when I re-wired my house-- I had multiple things on random circuits, several overloaded, one circuit that the previous owners "fixed" by adding a GFI outlet in the living room-- that sure didn't stop the light switch from smoking, but I guess it was easier to re-set that in the LR then have to go to the service panel... Another circuit that had **19** things on it (outlets and receptacles) ending at the microwave in the kitchen (!!). So basically I ended up just chopping power, disassembling outlets/fixtures to bare wire, and my dad and I went through with a multimeter and figured out where a wire went from the service panel. It was a long, painstaking process, but helped to figure out a) what we were dealing with so we could b) figure out what we were going to do with it.
Ended up re-balancing everything on paper, and then pulled out the aluminum wiring, replaced with copper, upgraded circuit counts where needed, added AFCI breakers where required, outdoor outlets that weren't there before, -- ugh. It took a bit, but it's all amazing-like now. (Oh, and pulled Cat5/Cat3/RG6 to each room, and expanded wall outlets in bedrooms from one gang to two, cos you never
have enough outlets in a bedroom, what with cell phone chargers, computers, TV and game consoles becoming more prevalent in bedrooms these days.)
So tl;dr -- if there's no power, and you had bare wires on both ends, you could use a meter to check for continuity from one wire to the other, after connecting them on the other outlet. Best to do if you're gonna rip it all out and re-do it anyways.
[Probably would not suggest doing this at a venue... haha.]