Wiring a Motion Sensor to Existing Cage Switches in Multi-Apartment Garage Lighting

Hi
I would like to connect a motion sensor in my garage to automatically switch on the light. Unfortunately but I have no idea how the installation is done because the garage is in a multi-apartment building and not private. I could not find a box in the garage. There are 4 lamps (two each on two walls).
There are also two cage switches (one by the gate, the other by the door), such:



T now I wanted to connect a sensor with such a connection:



I seem to have found a diagram where the black/red wire coming out of the sensor is connected to the L input before the switch but I have doubts.



Due to the fact that I don't know how the cables go and how they are connected I made a photo and a spread:

Switch 1


Switch 2


and now a breakdown of which wires have voltage depending on the position of the switch (I called it ON OFF but it can be position 1, 2 etc as you prefer)



And so I have a conundrum. For me it doesn't matter to which switch the detector is connected, because I want to pull the cables to the ceiling to mount the detector there anyway.

Maybe one of you has an idea how to do this?

smelbo wrote:

Unfortunately, I have no idea how the installation is done

This I can tell you, the installation is botched and not compliant.
If you want to add a motion sensor to the staircase switches (because they are there), then connect the output from the sensor directly to the wire going to the lamps (of course, the sensor must be powered from the same circuit as the staircase switches)

smelbo wrote:

The box in the garage was not found.

Then you'll have the problem of powering the detector, because you'll find the phase on one of the switches (you'll need to check on which one, while the neutral wire will only be at the lamp.

Another problem is whether you have permission to redo the installation ?

kokapetyl wrote:

Then you will have the problem of powering the detector, because you will find the phase on one of the switches (you have to check on which one, while the neutral wire will only be at the lamp.

In the last photo I've thrown in where the phase is all the way, from switch 1 yellow, from switch 2 black

smelbo wrote:

In the last photo I uploaded where the phase is all the time, from switch 1 yellow, from switch 2 black

This cannot be the case !
Can you draw the layout of the stair switches ? If not then look on the web for this information.
The phase only goes to one switch and there will be a lamp on the other.

smelbo wrote:

For me, it doesn't matter which switch the detector will be connected to, because I want to pull the cables to the ceiling to mount the detector there anyway.

This is not both

jharlan wrote:

smelbo wrote:

For me it doesn't matter which switch the detector will be connected to, because I want to pull the cables to the ceiling to mount the detector there anyway.

This is not both

And why does voltage appear on the 3 wires at the switches when I apply the tester, should that be the case?

smelbo wrote:

as I exemplify the sampler

Sampler, or neon lamp ?
This is an unreliable reading and such a phenomenon can occur, if you disconnect the correct phase then this sampler will not light up on the other contacts.
Disconnect the black and brown on one of them will be the phase, only on one.

kokapetyl wrote:

Another problem is whether you have permission to redo the installation ?

I will repeat the question.

If you have somewhere to connect to the terminals on the lamp holder (one of the lamps), then by tightening the L from the common terminal of the one of the switches to which it is fed, you will be able to connect the sensor.

If you only have access to the switches, an ordinary sensor cannot be used, you would have to do something special, e.g. use a 12V sensor powered by a rechargeable battery charged by current "stolen" from the switch terminals.

I have access, alternatively I think I will put a box right behind the box and separate the detector and the switches there. Then both should work.

Done, it works and the sensor and switches independently. I consider the topic closed