Do you have to use capping?

[Engineer54]

As a matter of interest, has anyone used these gripper adhesives to fix conduits back to the wall in wall chases etc?? I ask, because that's what the electrical contractor is using on our site, where additions and changes have been made. Seems to work quite well too, dammed if i could shift any of the fixed conduits while out on site.

Though this stuff comes in plain tubes, it looks and smells very much like the stuff you can buy at the DIY sheds in UK, something ''Green'' i think it's called...

 

[ipf]

'Gripfill' is pretty good

 

[mackers]

striaghten cable with palm of hand down to back box, insert cable into back box then cap! nothing more to it!

apart from the nails falling out of rotten mortar, crumbling bricks, cold cable refusing to be straightened, bent nails, hammered fingers, give me ega tube drilled and plugged every time.

did u once work for me! which agency are u from ? LOL

 

[DuktigVovve]

There are loads of reg concerning cable installation and the main one for cable in plaster would be section 522.5 concerning corrosive or polluting substances........................which is now irrelevant with modern plaster, so cable can be run without additional protection such as capping

As for the use of a trowel and damaging the cable, again you could refer to section 522.8 and other mechanical damage and 522.8.1 in particular, but again mention of capping sheathed cable in a wall is not mentioned, so again it really is your call if you think you want to cap it.

Personally I like to use oval tube to cover the cables, no more reason other, that was the way I was taught to do it, which is not a reg but a personal preference

If you look at a data sheet for Bonding plaster, in the toxicology info right down towards to bottom, it will mention that when wet, bonding plaster has a pH rating of 7 neutral to 13 Alkaline. They are never specific as it very much depends on the origins of the various components. What that means though is, as pH is a logarithmic scale, if the mix is at the higher end of that range, it could be a million times more alkaline than the lower end. That makes it extremely corrosive and it will attack PVC sheath and make it brittle and much more likely to break down in normal conditions. That is why I insist on using capping or oval conduit on a PVC/PVC install: I don`t want any comebacks a few years down the line for the sake of a few quid now.

 

[littlespark]

10 year old thread. I thought Easter was the time for resurrections?

Anyway…. I would have thought tin capping would corrode more than pvc sheath…. And even using capping, some of this highly corrosive mixture will find its way behind and up against the cable.

One of the reasons I actually like working on new builds with little or no solid walls.

 

[ipf]

I don't tend to remember my posts from 2012.

 

[DPG]

Blimey there's a post from Eng54 and it hasn't got exclamation marks in it!!

 

[ipf]

Blimey there's a post from Eng54 and it hasn't got exclamation marks in it!!

He knows. He's just teasing us from above.....