Polystyrene Facade: UV-Resistant Flush-Mounted vs Hermetic Surface-Mounted Socket - Legrand

Hello, I have a facade of polystyrene 20cm and structure. I want to make sockets outside, but I will let cables go in the house because it is being renovated and drilling straight through the wall and here the question is, what is more correct and safe, is it possible to let a plastic box deep in polystyrene and in this socket resistant to UV or let in a hermetic socket, e.g. Legranda and processing with acrylic? I do not want to mount the surface outlet or mount the door or other special cabinets. The nest is under a small roof but driving rain can reach there. I will add that the voltage will not be there because there will be an additional switch inside the house and turned on only when I mow the lawn.

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Fastening electrical devices on the facade of a building insulated with polystyrene
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Thanks for the cool materials, but that would have been useful to me before laying the insulation. I do not want to assemble the boxes because this place is not exposed to flooding, continuous rain, only rain driving, so it seems to me that the wall sockets that I purchased from Legrand have a degree of protection IP 55 so they are certainly safer than ordinary sockets. I just wonder if letting such a wall outlet in polystyrene nothing will happen? (Of course, under the socket there will be a distance from a white block to make the socket more stable.)

Sja08 wrote:

I just wonder if letting such a wall outlet in polystyrene nothing will happen? (Of course, under the socket there will be a distance from a white block to make the socket more stable.)

After all, you will make thermal bridges in this way, and the continuity of thermal insulation on the facade is as important as a well-made electrical installation.

And how do I give a hard polystyrene or wooden block and then let this nest in? I am thinking about what will be safer against precipitation. I also saw flush-mounted sockets but mounted in a regular can, which I think is a poor protection because water can fly through the wall behind the socket (I only know how to tear the cloud) so he decides that he will mount this company a socket with a dedicated can because it is with a seal between and there is a gasket even under the flap.

Instead of acrylic processing a can and a piece of foam under it, paste it on the foam, but a better company (preferably blue for gluing foam).
It is worth covering with plaster tape around, as if the foam has come out so as not to make the wall look ridiculous, and what comes out will then be cut with a knife - you will have a tight and without unnecessary thermal bridges.
Blue foam will catch a can forever and is resistant to UV, water, and temperature, and has high penetrating properties in foam and walls, you only need to be careful because it grows quite strongly.