How to Wire 2 Motion Sensors to a Staircase Switch with 3 Wires

Question

Hello I would like to connect 2 motion sensors to the staircase switch, 1 at the bottom and 1 at the top. I just want to consult so as not to burn out the detectors. Well, the thing about a staircase switch is that I turn it on at the bottom and turn it off at the top. And it would be most...

kizek · Answer

What kind of motion sensor do you have? It is definitely necessary to connect the phase wire L, the neutral wire N and the receiver to the sensor.

onepiotr · Answer

The detector must bridge contacts 1 and 2. The drawing shows that you do not have a set of power cables for the detectors at the switches.

kamiloOO7 · Answer

Yes, detectors have L,N,L`

the detectors are as follows:
I deleted the link to the auction. 3/1/18. (10.11) It is prohibited to publish information to sources that expire after some time (publishing links to short-lived websites). [Łukasz]

onepiotr · Answer

The detector must be powered: L - phase, N - neutral. The L`` output supplies the phase to the receiver. !? - Should it be installed in place of the existing stair switches or in addition?

kamiloOO7 · Answer

one will be additionally installed

Arturo2005 · Answer

Buddy, what experience do you have in this?

mar_cik · Answer

And green and yellow live again. KamiloOO7, your installations were done by a bungler, are you aware of that? Connecting motion sensors to lighting switched by stair switches conflicts with the logic of operation of these switches.

onepiotr · Answer

My friend is right and the guy posted above is also right: Buddy, what experience do you have in this? The author`s experience with these blocks is probably not the best, and the idea is not very successful. It would probably be best to install these detectors as a parallel source of lighting (backlight) to reach the staircase.

zybex · Answer

I will defend this electrician here. In this case, colors do not matter much. I see them in installations in the same place (stair switches) where cables with uncolored conductors are used. And what will you say then, mar_cik? It doesn`t matter what your friend encountered. This will certainly not be an interpretation of applicable standards on this forum. I`m warning you.[kkas12]

onepiotr · Answer

Gentlemen, let`s not go crazy. Standards are standards, and the installation is installed by people who know what they are doing (most often

). The next person who comes to dig around in the light switch box will know what to expect from the yellow-green wire in this place.

Maybe it`s better to close this topic because we are missing the author`s goal.
In order not to miss the author`s goal, all you need to do is stick to the topic.
Moreover, standards are for thinking people.
There is one reward for those who think they think on this forum. If you want to find out what it is like, please don`t think while writing.
I`m warning you.[kkas12]

kamiloOO7 · Answer

people, these statements lead nowhere, I wanted advice on connecting in a cool way. of course, everything is possible, I also have an idea, but I wanted to ask (apparently, 2 heads are better than 1), but in this case, the statement that the bungler did it was ridiculous, especially since the electricity was done by PKE power engineers with many years of experience. I can only expect further comments on why I won`t take these electricians (why two detectors?!) etc etc I have some experience, but I don`t work in this field every day. best regards

mar_cik · Answer

My friend Zybex and kamiloOO7 , green-yellow insulation means protection, safety, lack of tension and there is and cannot be any discussion on this subject. I will repeat. Connecting motion sensors to lighting switched by stair switches conflicts with the logic of operation of these switches.

Arturo2005 · Answer

You know, buddy, I deal with energy drinks almost every day and I know what kind of problems they can cause. Just because they used a conductor reserved ONLY and EXCLUSIVELY as a protective conductor for another purpose, in this case as a phase conductor, their authorizations (if they have any) should be taken away. This is too much!

zybex · Answer

So I will add fuel to the fire. I very often watch installations made by electricians. The blue phase is a common occurrence. Sockets with 1.5 mm² wire are also not a first. Even though I`m an amateur, I don`t do that. As you can see, the fact that someone has "paper" does not mean anything.
However, I will come back to this staircase switch. The switch, as you know, has three terminals. If we use a cable with three wires, we must use all three.

kkas12 · Answer

So you should use a four-wire cable without the blue wire.

zybex · Answer

By this I mean one wire is left unconnected? If so, it`s a waste of copper, unless we treat it as a possible reserve.

kkas12 · Answer

You`re thinking wrong. A protective wire remains and must be present in every circuit. Metal fittings can also be installed. And it definitely has a protective clamp. So nothing remains.

zybex · Answer

Ok, I`ll remember these tips. How does this apply to old installations, when someone, for example, wants to move the socket a little further or add an additional one? Does it make sense to add an extra vein when everything before does not have it?

kkas12 · Answer

Everything you do today must have separated PE and N wires. Even if it`s just one socket.

KaW · Answer

Maybe the title is not too precise. I replaced this installation with motion detectors
-residents simply enter the detector zone and the lights are turned on for a specified period of time.
The cages are three-story. No one uses any switches anymore. The same applies to single-family houses. It saves electricity and is mainly about comfort and health and safety.
Nobody is looking for switches in the dark.

mar_cik · Answer

You are talking about installations with staircase automation, where motion detectors can be easily used and the whole thing will work properly. This is not the same.

KaW · Answer

At the bottom, connect the 1N4007 diodes with anodes to the wire. "1" and "2" - and connect the brown wire from the detector to the cathodes (connected together).
- the same at the top. If there are to be two motion detectors.
This will be a logical product.

Anonymous · Answer

The author of the topic did not write, or I did not read, what he wants to achieve by "entangling" motion sensors with stair switches. With 2 motion sensors at your disposal, you can omit the staircase switches. Adapt the existing cables accordingly and the problem will be solved. Moreover, the motion sensor has adjustable time of day and switching time, so you don`t need any staircase automatics to walk with your hands in your pockets and not look for the switch.

PS For some time now I have been seeing and installing motion detectors, so they don`t care whether the power goes to L or L`.

Anonymous · Answer

The more I think about it, the less I understand. Once again - how is this supposed to work? You want to have at the same time:

1. two stair switches and two motion sensors?
2. one stair switch and two motion sensors (!?)
3 whether to remove the stairs at all and install sensors in their place.

As for the yellow-green wire, which is sometimes under voltage - for peace of mind, I would at least wrap it with black insulating tape; Maybe one day it will save someone from being "challenged".

Regards.

Moderated By retrofood:
For similar "advice" you can often expect a reward in the form of a warning.

kamiloOO7 · Answer

I would like to leave this stair system completely and additionally connect 2 motion sensors. 1 up, 2 down

Anonymous · Answer

Equip motion sensors with switches - because they only have a make contact.
Instead of the existing staircase switches, use cross switches.
By the way, this makes no sense, just like "plugging" a single switch into a staircase system.

This is all one big nonsense. You have a stair installation with a 3-wire cable, and the yellow/green wire is energized :!:

You don`t want to modify anything, just add motion sensors which, in addition to the L phase and the L` lamp output, have an N terminal and need zero for power supply. Not enough "wires".

Anonymous · Answer

If you persist, you can do it. However, it is very important that both stair switches and sensors are powered by the same phase, otherwise a short circuit will occur.

If the motion sensor turns on the light, it will not be possible to turn it off with the switch because the electricity to the lamps must flow through a separate cable. Therefore, if you turn on the light manually and in the meantime the sensor is activated, you will not be able to turn it off. You will have to switch the staircase and wait for the timer to work.
If I`m wrong, someone please correct me.

Anyway, you can of course do whatever you want, but I don`t think it`s a practical solution; it will be rather uncomfortable.

EDIT:

My friend All in One gave me another idea.
You can connect it in another way - the output from the sensors to the staircase power supply. Of course, reconnect the existing staircase power supply to power the sensors

If you leave the staircase system on, the sensors will control the light, and if it is off, the light will not turn on.
The advantage of this solution is that you will always be able to turn off the light, but the disadvantage is that you will not be able to turn it on if the sensor does not work.
The opposite of before.

Anonymous · Answer

The traditional stair installation diagram is at the beginning of the topic, I was thinking about a "saving" system:

How to Wire 2 Motion Sensors to a Staircase Switch with 3 Wires

How to Wire 2 Motion Sensors to a Staircase Switch with 3 Wires

but for the world`s sake, adding a motion sensor is not appropriate here either.

As for wrapping the yellow/green wire - you can also apply heat shrink, but if someone wants to hang a picture on the wall, they will pierce the wire with a nail and then repair the damage?

MrMazi · Answer

I don`t agree with my friend. It`s the same for me. First, I wanted to make lighting that could only be switched on by detectors. One at the top and the other at the bottom. Then someone asked me a question. What if you want to do something in the stairwell? Fix something, paint something? Then will you run for light? Then I added the stair connectors. And it has already paid off for me several times.

How to Wire 2 Motion Sensors to a Staircase Switch with 3 Wires

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