Embedding cable under external render

[Christian Lenehan]

What's best practice if running cable from garage out to outside double sockets? I'm re rendering that wall and thought it'd be nice if I could hide the cable under/within the render...

Is it possible / allowable within "the code"? With or without conduit? Does it need to be armoured cable?

 

[James]

i would probably use swa with outdoor glands.
if you use 5 core it may be possible to run a 32A ring by using 3 cores for the out leg and 2 core and swa for return leg.

 

[Christian Lenehan]

i would probably use swa with outdoor glands.
if you use 5 core it may be possible to run a 32A ring by using 3 cores for the out leg and 2 core and swa for return leg.

Thanks James. Wasn't sure I underatood fully (it's all. Pretty new to me) but had a brain wave this morning... Single cable carrying the out leg and return, the swa provides the earth for return leg (?) is that right?

I was going to run it out as a spur from existing ring main. Guess I'm best extending the ring instead given I'll be using the 5 core swa and distance isn't large either...?

 

[littlespark]

Do permitted zones exist on the outside of a building? I would think they do.
After rendering, no one will know where the cable run is.

How many sockets/ anticipated load? Extending the ring might be too much if you can spur off a fused connection unit.
Cable will be thinner too for render coverage.

 

[Christian Lenehan]

OK. Thanks for replies so far. Theyve helped a lot.

So I've got 3 core swa because that's all the spot had in stock, and a metal fused connection box to run a spur off of the existing 2.5mm ring main.

I've just marked possible channels to dig out of the scratch coat to help bury the cable.

Am I right in thinking I need another metal junction box (either buried in or proud of render) that I can then go from there to the switch and put to the wall light.

You'll notice I'm now not going double sockets. Just wall light.

Any warnings, tips or advice?

 

[Christian Lenehan]

What box would folk rdcommend? Quick search and find the choice overwhelming and then see T junctions and think maybe that's good...