Hey, does anyone know how to tell which electrical outlets are on the same circuit? Is there some kind of tool out there you can buy that you can plug in one outlet then go around to each other outlet and when it sees that other plug it will light up or something? When my house was built the electricians did a SHIT job, but since I switched from central AC to window AC I have some power to play with but want to make sure what outlets are on what breaker. I know they messed up because a couple outlets in my living room go out at the same time ones go out in my office.  And that's two room away. Unless that's the way it is done? I was NEVER any good at electricity. Horrible at it.