I tried installing a smart dimmer switch and add-on into a two-way switch configuration, but after a few hours of messing around I think that the circuit isn't wired properly for a smart switch. Right now the light ( a LED panel wired directly into the circuit ) is way too bright at night so I wanted to put in a smart dimmer.
Green: ground, black: load/line, blue: neutral, red: traveller, numbers indicate "bundles" -- 1 is all the wires going to/from the breaker, 2 is the set of four wires going from switch to switch, and 3 goes off somewhere else, probably to the next bedroom as all the ceiling lights are on the same circuit.
Basically, instead of being wired "switch -> switch -> light", the light sits in between the two switches. Based on what else I've seen in this ( newly built! ) townhouse, I think this was the electrician saving themselves some money by using less wire to get this set up =. It works fine for dumb switches, but after spending three hours it seems there's no way to hook up a smart dimmer + add-on that will allow them to control the light.
As far as I can tell, the smart switches are only built to handle the "switch -> switch -> light" setup. The second switch only connects to neutral, ground, and traveller; so in the second box that leaves the load/line wire unconnected and means the circuit is incomplete.
Is there a way I can put in a smart dimmer & add-on that will allow me to control this light? In the second box where the add-on switch goes can I use a wire nut to connect the neutral & line, or will that mess with the add-on switch that needs to be connected to neutral?
Could I use a Shelly dimmer right in the light fixture box?
Or am I just out of luck until I completely re-wire this switch circuit?
I labeled the inputs into the light fixture as A and B, because I can't tell which one corresponds to switch 1 and which to switch 2. Oh, and the triangle labeled "WN" are wire nuts, because I figured that was the easiest way to show how