ᐅ Outdoor sockets and lighting fixtures with telescopic mounts / boxes

Hello,

before the insulation is installed on the exterior, we want to install several telescopic carriers/boxes to avoid any thermal bridges. My only question is whether the cable really has to be laid outside on the facade inside a conduit, or if I can run it through the wall and essentially through the middle of the carrier. Does the cable then need to be sealed somehow? Or is it enough to drill a relatively small hole so that the cable seals itself? The conduit would, of course, have to be led back into the house as well 🙂 Thanks in advance!

The telescopic beams were, among other things, specifically designed to allow cables to be routed through the center to the outside. How you seal it afterwards is up to you.

If it’s “only” about outlets or similar, you can work with the mounting brackets that are more complex to install. After a short search, we found and installed this alternative. The boxes lock into the top layer of insulation (in our case, wood fiber boards). With traditional ETICS made from EPS or similar materials, I’m not sure if these are approved for that. These boxes seal themselves (rubber gasket); inside, we sealed the cable entry with a permanently elastic cartridge sealant. It seems to have worked, because our blower door test was below 0.5 in all residential units. We hung lamps using these transparent or white insulation anchors.

For very heavy items, the mounting brackets are probably more practical (mailbox?).

I generally find the supports to be much better. With the boxes, I’m concerned that if one is frequently used, it might eventually wear out, and then you have a problem.

Mycraft schrieb:

The telescopic supports were developed, among other things, specifically to allow cables to be routed through the middle to the outside. How you seal it afterward is up to you.

The question is whether the cable entry even needs to be sealed at all?

Bauenaberwie schrieb:

I generally find the mounting brackets much better. With the boxes, I worry that if one is heavily used, it may eventually wear out and then you have a problem.

The question is whether the cable entry needs to be sealed at all?

The cable entry must be sealed against moisture and air (key terms: blower door test, condensation in the insulation layer).

The shown boxes are at least approved for our ETICS (external thermal insulation composite system) using wood fiber insulation boards; the upper ring is embedded in the render! Anyone who then tries to pull out the box probably glues the plug firmly into the socket with two-component adhesive beforehand and then forcibly pulls on the cable 😉

Depending on the ETICS, installing the brackets can be difficult for non-professionals to do correctly, and the interfaces are harder to manage, but of course there are also advantages... If your gut feeling doesn't trust the other boxes, I would not install them.

As always, this is just my humble layperson’s opinion without any guarantee or liability.