Stair lighting in the stringer

Hello,

the carpenter of our stairs is making a groove on the back of the stringer where we can lay a cable. Every 4th stair step, the stringer will then have a hole for an LED recessed spotlight. The plan is to have a cable come out of the wall behind the stringer, which is then fed into the groove. That's the theory.

Here are a few questions:
- Can I lay high voltage in the groove of the stringer, or is that not allowed?
- When the carpenter makes his holes for the recessed spotlights, I think he will do this on the construction site and will basically make a hole for an empty box in the stringer and then in the wall (I have a prefabricated house). Here I could then attach the lamp holder. Is this allowed with high voltage?

Hello,

first of all, there is only low voltage (230V/400V) in the house ;)

Basically, you can lay a cable with 230V into the stringer of your stairs and also install 230V recessed lights there. You should consider that the heat can be properly dissipated.

However, you should keep in mind that there are several options for LED recessed spotlights.. (with central transformer, LEDs with 230V GU socket to screw into conventional spots, etc.)

First of all, you should know what you want.

Hello, Thank you for the reply. Of course I know what I want: 230 V with GU9 socket, if it is legally/normatively allowed as I have outlined it. Ultimately, it has to be wired in the cheek without a box.

230v should be done by your electrician, who also knows if the construction you came up with is okay. If you want to make it yourself, better use e.g. 24v DC LEDs, also because of liability/insurance...

Yes, I can coordinate that with the electrician. If it's 24 V, then the power supply unit has to go somewhere... Are there any recommendations on how to do something like that?

if it is as I have outlined

Please show your sketch.