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?
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?