First of all - I am turning off all power while doing work. I’m looking to replace 2 old dimmers (the ones that you spin) and I’m a bit confused by the old wiring. I’ve located the bare copper for grounds (sticking out and not connected) and the whites in the back for neutral. Can anybody provide insight on which is the load wire? I guess to truly determine this, I would need to disconnect all of the wires and use a non-contact voltage tester to find the single load wire. I would then loop from that one to the next. I’m just not getting why there are other wires feeding into the wall each step of the way (2nd connection from right one goes into the wall too). I’m also not getting how I would create a link between the units since I don’t really have a jumper cable to go from box 1 to box 2.
Any insight is appreciated - or maybe I’ll just call the electrician.