Adding switches to loop switch? via /r/DIY


Adding switches to loop switch?

This weekend I started a project to install a ventilation fan in our bathroom, which has never had one as far as I can tell. I have done similar projects in other houses, but I ran into a hiccup on this one.

When I went to add the new switches (one for the fan, and one for the fan light), I discovered that the current switch is a loop switch, and my understanding is that I can't add more switches via the loop switch. The current light fixture is mounted on the wall, so I pulled it, and it confirmed my suspicion.

So I'm just trying to figure out the best way to proceed. I was able to track the wiring in the attic and find where it goes from the switch to the fixture, as well as where the hot wiring goes to the fixture. My head tells me that I could re-run the wiring so that the hot wire goes to the switch instead of the fixture, then I could connect my three switches (the original light fixture plus the two new ones) to that, running wiring to the current fixture and to the fan/light combo.

I have looked for info on if that is the solution, but I'm not having any luck. I'm finding plenty of information on how to add another switch that controls the same light, but not what I'm looking for — adding new switches to control new fixtures. Has anyone had any experience with this?

Submitted May 23, 2021 at 09:46AM by wdtellett
via reddit

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