eathed metal conduit or capping

[clarke24]

Is earthed metal capping just as as good as using earthed metal conduit the reason I ask is that I have to run a cable form a cooker switch to a cooker connection unit but cannot run horizontally or vertically or in any of the zones where no protection is required and the regs state i must use earthed metal conduit, trunking or ducting.

 

[breezer]

since conduit is cylindrical it gives mechanical protection all round, capping only gives mechanical protection from the elevation it was fitted. but for what you are doing capping will be fine.

just thinking as you said

but cannot run horizontally or vertically

which way are you going to run it diagonaly, or into the 4th dimension?

 

[JerryD]

Can't agree Breezer, regs state conduit, trunking or ducting, which must be earthed. Capping is none of these.

 

[breezer]

i dont want to be picky, but he could use plastic trunking that can not be earthed

 

[JerryD]

You can't use plastic in this situation. Regs state "must be enclosed in earthed metal conduit, trunking or ducting........."

Regulation 522-06-06

 

[clarke24]

Thanks for clearing that up, wots the best way to fix it to the wall bfore plastering, spacer bar saddles still space it off the wall a little[/u]

 

[shaggy]

....unless it's 50mm deep though Jerry?

 

[JerryD]

....unless it's 50mm deep though Jerry?

Yep, that's true. But in reality what's more likely (and safer). I'd go the earthed conduit method every time.

 

[JerryD]

Also you shouldn't cut such a deep chase in a wall less than 300mm thick (as a single skin - cavity wall doesn't count here) as Building Regs require horizontal chases to be less than one sixth the thickness of the wall.

I know diagonal is not quite horizontal (!) but you can see where I'm coming from??

I presume the chase has to be 50mm deep PLUS the cable thickness, so that the closest face of the cable is 50mm deep?

That needs one mother of a thick wall

 

[securespark]

Thanks for clearing that up, wots the best way to fix it to the wall bfore plastering, spacer bar saddles still space it off the wall a little[/u]

Use Crampets, see tlc for details.