Hello everyone,
As you can easily see in the pictures, I have a lot of electrical cables that required corresponding chases. Now all the cables are in place, and I need to close the large recesses, especially the big gap at the rear right in the picture.
Should I use the usual patching plaster (such as Knauf Rotband), or are there special materials that are more flexible and less likely to develop cracks over time?
To bridge cracks, I will of course incorporate fiberglass mesh or similar reinforcement.
It is also important to me that the filling material is strong enough to restore at least some structural stability to the masonry, which I don’t expect from Rotband.
Could I possibly use masonry or plaster mortar, or even cement mortar for this? Are NYM-J cables allowed to come into contact with these materials?
Thank you in advance and best regards,
Scami
As you can easily see in the pictures, I have a lot of electrical cables that required corresponding chases. Now all the cables are in place, and I need to close the large recesses, especially the big gap at the rear right in the picture.
Should I use the usual patching plaster (such as Knauf Rotband), or are there special materials that are more flexible and less likely to develop cracks over time?
To bridge cracks, I will of course incorporate fiberglass mesh or similar reinforcement.
It is also important to me that the filling material is strong enough to restore at least some structural stability to the masonry, which I don’t expect from Rotband.
Could I possibly use masonry or plaster mortar, or even cement mortar for this? Are NYM-J cables allowed to come into contact with these materials?
Thank you in advance and best regards,
Scami
I find it surprising that the cables here apparently do not originate from the distribution board; and reassuring that they are mostly just plaster grooves, because otherwise crossing grooves would be undesirable for structural reasons. I believe that adding fibers to the plaster would be more effective than embedding a mesh.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
K
knalltüte11 Jan 2021 16:57May I point out, even though you didn’t ask, that I see two potential issues here?
Long and deep horizontal slots could affect the structural integrity. Has this been planned and/or approved by a professional engineer?
In addition, grouping many electrical cables too tightly can cause load issues (the cables heat up and the maximum allowable load decreases). In some cases (which I consider possible here), this can be significant. It would be wise to have a certified electrician take a look before you close it up again.
Long and deep horizontal slots could affect the structural integrity. Has this been planned and/or approved by a professional engineer?
In addition, grouping many electrical cables too tightly can cause load issues (the cables heat up and the maximum allowable load decreases). In some cases (which I consider possible here), this can be significant. It would be wise to have a certified electrician take a look before you close it up again.
K
knalltüte11 Jan 2021 16:5811ant schrieb:
I’m surprised that the cables don’t seem to run from the fuse box here; and relieved that they appear to be mostly just chases for plaster, because crossing them would be structurally undesirable. I think adding fiber reinforcement would be smarter than embedding a mesh. I believe on closer inspection that the chases are significantly deeper than just plaster. That’s why I posted, apparently at the same time 😉
K
knalltüte11 Jan 2021 17:01Ah, and communication cables run parallel to power lines over long distances are also not an optimal solution.
Who planned this cable route? Is this a new build or a renovation of an existing building?
Who planned this cable route? Is this a new build or a renovation of an existing building?
Similar topics