Capping

[mark not sparks]

Hi Chaps i am currently doing a flat refurb i have had a sparks in and he has chased the cables in below 50mm depth and clipped them with in the chase but not covered them with capping or conduit is this correct or should they be protected against the plaster ?

 

[johnboy6083]

there is no rule or regulation that says you have to use capping. it is only used to protect the cables from the plasterers trowel. capping offers no other mechanical protection other than that.
if it is only the chase that is to be filled, then i dont see a problem with what your sparks has done

 

[mark not sparks]

Johnboy for my sins i have borrowed a regs book 17th edition

chapter 52 522.5.3 Materials liable to cause mutual or individual deterioration or hazardous degradation shall not be place in contact with each other

any thoughts

 

[johnboy6083]

as far as im aware, normal plaster deos not damage PVC. ill do some quick research and come back to you.

 

[telectrix]

modern plaster is not detrimental to modern cable. used to be that the old lime and horeshair plaster would attack the old rubber cable, but today's materials-- no problem.

 

[pennywise]

think it is only lime render

 

[johnboy6083]

i researched hard, (pennywise and telectrix's posts lol) and found that we are all corect!
i beleive that in the OSG, or BRB there is a table with suitability of deifferent cables on it. diont know the page numbers and aint got my OSG ect here to look

 

[mark not sparks]

Sorry to be a pain but what about normal cement as 1 of the walls is being rendered for strength

 

[telectrix]

should not be a problem, but have a word with your spark, ask him if he is willing to cap that 1 wall because of the cement.

 

[mark not sparks]

thanks chaps enjoy your sunday roasts

 

[Geordie Spark]

should not be a problem, but have a word with your spark, ask him if he is willing to cap that 1 wall because of the cement.

I always use capping because - rightly or wrongly - I think that if ever I need to replace or add a cable, I have some chance - albiet slim - of doing so if there's a length of capping there. If there wasn't then I would have no chance !!!