Building without antenna and SAT-CAT cable without conduit?

  • Erstellt am 2020-06-06 12:18:48

kati1337

2020-06-17 12:58:36
  • #1
We spoke again today about the CAT topic.
Electrical says they would do the installation in the conduit if we insist, but advise against it.
The additional costs for the inclusive services would be covered by the general contractor, but we would bear the extra costs for our additional CAT ourselves.

The argumentation was roughly (as I understood it):
- The DIN standard says cables should be in conduits, but it also says no angles greater than 30°, which is unavoidable with today's construction methods in new buildings. Specifically, the lady mentioned that they can only use the floor space to a limited extent (since the underfloor heating takes up a lot of space), and they mainly have to run along the walls, where 90° angles cannot be avoided
- Exchangeability is hardly or only difficultly possible even with conduits, because 90° angles are unavoidable
- Possible visible cracking in the walls. I could imagine this being problematic because such cable conduits have a 20mm outer diameter, right? And according to the general contractor, we get about 1.5-2cm plaster applied. I imagine 20mm conduits in 20mm plaster is difficult, or is there something else between the wall and the plaster?
- Additional risk that condensation could collect in the conduit and damage the cables
- The likelihood that something happens to the cable inside the wall after successful commissioning is low (unless someone drills into it, but the conduit wouldn't help there either).

What do you think?
 

rick2018

2020-06-17 13:05:56
  • #2
Pipe and nothing else. The arguments are not tenable. He simply does not feel like it. Good installation cable can handle the angles. The pipe does not go into the plaster but into the wall.
 

Mycraft

2020-06-17 13:09:31
  • #3
Blah blah blah. They should just admit they can't do it and don't want to. Everything, really everything they bring up as a counterargument is absolutely unfounded. If you want to, you can do it and it also works. It's not about the entire electrical installation in the conduit, but merely about CAT or all data cables. That should definitely be possible.

And the cables/pipes should not necessarily be embedded in the plaster but in the wall. Then you won't have any space problems.

Here quickly an example of how it can work:





Edit: now was faster and writes practically the same thing word for word
 

kati1337

2020-06-17 13:21:34
  • #4
Yes, that is quite noticeable. Almost everyone I ask for their opinion agrees with you. They have now also offered to install it in the pipe, so that’s already good. I just have some concerns about cracking. I don’t want to have cracks in the wall afterwards. They can’t lay it over the floor on such a large scale with us; we are getting underfloor heating with this tighter system. Therefore, they have to go through the walls, they said on the phone. According to my logical understanding, if they hammer a channel into the wall (?) and lay a pipe there instead of a cable, there shouldn’t be any negative effect on the plaster afterwards, right? I mean, where would that come from? Both pipe and cable would be round, only the channel would have to be a bit larger in diameter. Can that have a negative impact on the plaster? It doesn’t make sense to me. But maybe someone has experienced something like this before?
 

ntsa86

2020-06-17 13:30:11
  • #5
We have a complete cable duct in the wall in the TV area (these are 24 cm interior walls). Not a single thing of it is visible at all.

Edit: additional question for the experts. Do data cables now necessarily have to be installed in protective conduit according to VDE?
 

danixf

2020-06-17 13:34:22
  • #6
What kind of tighter system? The underfloor heating is on a completely different level in the floor structure. There is insulation, etc. And you can't just flatten this insulation like individual cables; you have to cut it out a bit.
You have cracks anyway. But not because of the cables or the pipes. You can set the cutting depth of the milling machine so that the pipes are flush with the wall. On top of that, there's plaster. The same goes for a channel. It is simply set a few centimeters into the wall depending on the depth and plastered over.
They are feeding you nonsense unbelievably.
 

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