DIY Doctor

Looking for the Right Wiring for a Smart Switch

Postby mauimauer » Tue Feb 25, 2020 2:17 pm

Hey there,

I currently live in a flat that was built 2 years ago. I have just checked the light switch wiring and it seems to me that I am looking at a 3-wire setup with neutral in the switch box.

The switch seems to be a 1gang 1way double pole. (It's the outside switch for bathroom lighting.

Most smart switches I have found seem to be designed for single pole 3-wire. Can I replace what I have with a smart switch? Can I go from double pole to single pole?

Here are some pictures from the current setup, as well as a wiring diagram for the smart switch I am looking at.
IMG_20200225_112245.jpg

IMG_20200225_114027.jpg

IMG_20200225_112301.jpg


(the diagram is for the EU round variant, they do however supply one with the square UK format as well)
H70866742c851468e90b089a499b44276h.jpg
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Postby Mr White » Tue Feb 25, 2020 6:59 pm

Does this switch operate the fan as well?
Its just it looks like and looks to be wired as an isolator, which is a requirement for bathrooms.
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Postby ericmark » Tue Feb 25, 2020 11:07 pm

As said one of the versions of the building regulation parts, now it seems withdrawn think part L said that if you have a non opening window you need to be able to turn on fan without the lights, so a double pole switch was used with the lights so a second switch could be connected in parallel to fan pole so fan could be run without lights, but lights could not be used without fan.
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