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Smart Home Forum by FIBARO Team

Fibaro Switch for homekit : no load wire


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I'm watching the electrical scheme in the instructions and trying to figure out my system ... I can only see the live wire (red) going to the existing button and the neutral wire (blue), but there's no load wire. Is it really necessary or can I just plug the live in the L and the neutral in the N ? 

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Hi @davidgnomo,


I think, there are 2 possibilities:

  • In classical old installation there would be L and Load. Maybe your electrician used blue cable for connecting to the light.
  • Or does your switch have some capability of connecting to Light remotelly (some sub-GHz band or different)?


In either way, there is no way of connecting Fibaro Single Switch without Neutral wire.




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  • Topic Author
  • I got live L and neutral N, what I don’t have is load (the one which is called Q on the Fibaro device) : can I use it without plugging a Q wire ?

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    You can not have only live and neutral at the switch, because after switching the switch you would make a short circuit (contact live with neutral). Just because you have a blue cable does not mean you have a neutral one there. Rather at the switch you have live and load.

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    • 2 months later...

    Following-up on this thread...in my installation I have wall light double switch (but only one ceiling light-don't ask) so three wires in the box - live, neutral and something (I guess there is one wire for each switch?). Anyway I connected live to L in Fibaro, neutral to N and it works, it is powered, I managed to add to homekit. But I cannot make it work with the wall switch. Outputs are clearly the other L to power the switch and S1 to control. What am I doing wrong?

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    • 1 month later...

    I have a somewhat similar issue.


    Two wires (Life and Neutral, no Load). I managed to connect it. When I use the switch, light turns on for a second and turns off again. Plus, the wall switch is not responding. I connected according to this scheme:


    Please login or register to see this link.


    Leaving the load out.



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    • 4 weeks later...

    Could it be a 2 wire system like the UK for lighting? Their is only a live and a switched live? A Voltage detector pen will tell you this.

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