Electrical Installation New Single-Family House - Evaluation and Suggestions

Cables for communication laid non-interchangeably and without distance to the high-voltage lines

You won’t notice a difference. These aren’t really high-voltage lines anyway. The thing about being interchangeable is also a matter of theory and practice. The work at your place is clean. Being interchangeable would be nice because you can’t look into the future. I might mention that again, but it will definitely work that way as well.

no cable protection conduits in the area of the doors

For what reason? In the hallway area it would make sense because of increased traffic during the construction phase, but it will work like this too if a little care is taken.

the distance to the wall of at least 15 cm is not present

I don’t deal with electrical work in house construction professionally, but I did it myself at our place. There I was very meticulous about the measurements. In the end, the plumber wasn’t very happy because he had to cut his panels accordingly somehow. If they are right at the edge, it’s much easier... Again, theory and practice... What’s supposed to happen if they are on the wall? Due to the underfloor heating, you can’t drill into the floor anyway.

the cable routing under the window is certainly not permissible like this

I wouldn’t be so sure about that. I know that all wastewater pipes are coated with bitumen to keep moisture away. On construction sites I often see electricians simply drilling at an angle through the slab and then sealing the cables. Near the window like this I have actually never seen it before, but I doubt it’s the first time he’s doing it.

230v counts as high voltage. Laying a cable under a window and thereby destroying its fastening (foam) and sealing it with special tape, I find unprofessional. Why doesn't he just go through the wall or outside over the garage?

The 15cm distance from the wall is due to the fact that the screed cannot break at the edges. If there is such a thick sausage there, it is hollow underneath and it can break. The same applies in the area of the doors where there are always expansion joints. If there are 2 cables there, of course that's no problem, but with a bundle it is.

I just wonder why they don't do it properly right away while they still can. It is a new building and there are no problems because everything is still possible. Later, when the screed is in, it's over.

230v counts as high voltage.

By definition, you may be right. Nevertheless, you won’t really have electromagnetic fields here that cause interference. It has already been said that the data cable should actually go into a conduit. Still, very few people do that.

Laying a cable under a window and thus damaging its mounting (foam) and sealing with special tape I find unprofessional. Why doesn’t he just go through the wall or outside over the garage?

The cable is perhaps a cm in diameter. The window’s hold will not be impaired by that. As mentioned above, it has been sealed. Sewer pipes are only sealed with that as well. Therefore, I stick to the fact that this is not necessarily wrong. No idea, ask him? Going through the wall is probably not possible because otherwise the cable would lie above ground outside. He could have gone over the multiple service lines, but that probably costs a few € more because he would have to go around the whole house once.

A 15 cm distance from the wall has the reason that the screed at the edges cannot break. If there is such a thick sausage lying there, it is hollow underneath and it can break. The same applies in the area of the doors where the expansion joints always are. If there are 2 cables there, of course that’s not a problem, but with a bundle it is.

I didn’t know that. Learned something new again.

I just wonder why you don’t do it properly right away as long as you still can. It is a new building and you have no problems because everything is still possible. Later, when the screed is in, it’s over.

Money and time. Your points are basically not wrong. I just don’t understand that you let him work for 3 weeks, come to a forum now and ask questions in order to confront him then. The installation is basically finished. What was delivered corresponds to practice – that much has already been told to you here. What you do with it now is your business.

Because the acceptance for electrical work by my site supervision was only on Friday. And last week the cables were still lying loose and not bundled. The window cable was also only created on Thursday. But it should actually come out of the garage because it is for the garden shed. It should be a 5x10.

In practice, nobody gives a damn (subsequent trades) where cables lie around. People just stomp all over them. That’s why I would have recommended protective conduits mainly for the sake of replaceability. I also consider the bending radii to be partly violated even by the lowest "usual regulations," especially with the data cables. I’m not going to measure again ;) They will probably survive anyway, the few extra euros wouldn’t have hurt in my opinion (well, apparently they did).

With the power cable going outside, it also depends on what’s connected outside (how high it will be filled). I also don’t think it’s optimal to route a 5x10 from the floor entry profile.

And tell me, there are semi-automatic cable tie guns, is it really less work to tack the bundles together with insulating tape?

All in all, I find the installation cleanly executed. No empty conduits = a shame... but it doesn’t help because you probably wouldn’t be able to replace them anyway (you were already pointed out the bends in the installation). If you want it to be replaceable, spend a few thousand euros more and have underfloor channels installed with floor boxes at all important points so you can properly pull new cables. Network cable next to 230V cables is not optimal but also no problem, you won’t notice a difference. The only thing I would reject are the NYY-J cables under the window. Two more notes, because they are unfortunately often forgotten (especially by builders) 1. You get what you pay for ;) (especially builders, happened to me too) 2. The DIN standards are not laws or regulations, they are recommendations, otherwise we would all be criminals (there are DIN standards for everything and everyone)