As part of my renovation I am having a complete re-wire of the lighting circuits done. I need to provide specs for the electrician as he is not experienced with Z-Wave. I am planning Fibaro Dimmer 2 modules behind dumb momentary switches throughout and have therefore specified 3-wire wiring at the switches (I believe this is called “switch loop-through” rather than “ceiling rose loop-in”)?
This will facilitate installation of the modules behind the switches. However, there are one or two locations where I need to install 2 modules in a single width backbox or 3 in a double-width backbox. I imagine this is tight from a heat and physical space point of view. However I can’t get my head around whether I can install one of the modules in the ceiling space with this wiring topology. Will the wiring in the ceiling effectively be “2-wire” - i.e., switched live and neutral - and therefore I am undoing all my good work in getting 3 wires available at the switch?
Would appreciate advice on the normal way to get around this (@RobinWinbourne - you must have come across this problem before?). Do I just ask the electrician to create a much bigger wall space behind the switch - feels a bit clumsy?