Single Light Switch: Connecting 3 Cables (Blue, Black, Red) in Two Rooms with IKEA Lamps

I've finished plugging in virtually all the light switches in the house. I used single ones everywhere, because the situation required it. There were two cables (blue and black) everywhere in each can. I have two rooms left and I have a problem. Well, there are 3 cables (blue, black and red) sticking out of the ceilings. There is a similar situation in the can, but I have two black, two blue and one red.

In these rooms I want to install a single light switch (for now). I thought the matter would be simple, so I bought two switches as in the picture.

I bought ceiling lamps in Ikea. There in the cube there are two cables (blue and brown) inserted on one side and on the other side I have nothing. How to connect it? What is that red cable? And why do I have double black and blue cables.

Can anyone help? Thank you.

I would bet that in this box the blue wires (and the black ones too) are twisted because they go somewhere to the next switch.
In that case, if we have these 2 black ones twisted (or quick connector) and the blue one is insulated, then the black one is for one key and the red one is for the other key.
That is, for two-key switches.

To be sure, use a voltmeter to check the voltage between each wire.

Okay We're going to something. I don't know what the switches were like, because I just moved in and it was all cans. I need a single switch. Can you connect it? Do I have to go and buy a double?


I also present a photo of the second can from the second room. Here we have an insulated red cable.

Rather, two wires are power (black and blue) and three go to the lamp (black red and blue). You must have at least a pointer.
It's all divination from coffee grounds, not to mention that the photo is cut in the middle of the can.

Edit.


Where are the protective conductors, why are there twists?

Łukasz-O wrote:

Rather, two wires are power (black and blue) and three go to the lamp (black red and blue). You must have at least a pointer.
It's all divination from coffee grounds, not to mention that the photo is cut in the middle of the can.

Edit.


Where are the protective conductors, why are there twists?

Hello. Thank you. But I moved into the cabin and this is what I found. I do not know why it is like that. The cropped photo won't show anything else. The situation is the same as in the second one.

I love these questions about chandeliers and lamps like "I have four wires how to connect it", and at the same time zero information where the phase is where zero, etc. - well classic :)


Call an electrician, he will take 50 zlotys, and you will stretch your legs in the armchair, look at it and calmly drink a beer. Let a professional do it, he knows it

e_ster wrote:

I love these questions about chandeliers and lamps like "I have four wires how to connect it", and at the same time zero information where the phase is where zero, etc. - well classic

Because people think we have crystal balls.

I am closing this issue due to lack of information.

Regulations point 3.1.15. Don't ask on the forum right away if you haven't checked anything yourself or made an attempt to diagnose yourself. Remember that advice is provided remotely in the absence of physical access to the device, the problem must be very well described and understood by users, and the title should include the brand, model and a brief description of the fault.