house to shed getting 3core swa round bend of house.

catdog1121 · May 6, 2019

So I have a job to provide power to a cabin in a back garden.. Will be 3core 6mm SWA through back garden, consumer unit is at the front of the house, there is no way to dig the cable round to the back of the house as its a terraced house with a pathway to the back garden so will need to be run round the outside on the wall. Once in the back garden will be buried 600mm deep.

There are a few options I can think of:
- Try to use SWA all the way (Or too a Wiskabox before entry to house) and use 90 degree bend down to get round the corner of the house.
- 25mm pvc conduit carrying T&E to a wiskabox where changes to SWA
-20mm pvc conduit carrying 6mm singles to a wiska box where it changes to SWA.

Ive not used 3 core SWA much, how practical is it to get it round a 90 degree bend on a wall neatly?

Interested to know how anyone else would do this.

Toneyz · May 6, 2019

Is there no way that you can take the cable (be it T&E to an adaptable box or SWA all the way) through the house? You have not ruled this out in your post.

catdog1121 · May 6, 2019

No can't go through the house. I think the S bend on the corner and losing a bit of height is probably the best way to go. Don't really want to take a chunk out of the corner of the brickwork.

telectrix · May 6, 2019

your other option, cable in conduit ( black pvc) to wiska box around corner then into SWA is viable. remember to use earthing nut or banjo to earth the SWA armour.

MJPD29 · May 6, 2019

6mm will bend round a corner with ease realistically there isn't much size to it

Squid · May 6, 2019

Use Pyro........

GBDamo · May 6, 2019

Pete999 said:
Providing the bend you make complies to the max allowable bend radii as described in BS7671.

Radius, surely there is only one correct figure for 6mm three core SWA.

telectrix · May 7, 2019

seem to remember it's 4 x the dia. of the cable.

Marvo · May 7, 2019

Unless the house is some kinda architectural masterpiece just notch the brick slightly....

michael king · May 12, 2019

sooooo many things wrong with some of these suggestions,but andys got it right,you cant mallet the swa in to a tight bend because you contravene minimum bend radiuses.and you shouldn't be knocking the corners off bricks or drilling holes at 45* because it destroys their weather proof outer layer and they will be crumbling away in no time damaging the property.
The correct way to get an swa or pyro round a 90* corner is this ... works for any external and internal 90* corners... if for some reason it can only go in a straight line round the bend then you will have to put up with a slight bulge in and bulge out..but at least the cable will be undamaged either way.
Regards.
Mikethesparx

[ElectriciansForums.net] house to shed getting 3core swa round bend of house.

Spoon · May 12, 2019

michael king said:
and you shouldn't be knocking the corners off bricks or drilling holes at 45* because it destroys their weather proof outer layer

But bricks are not waterproof and will only have a waterproof layer if it's been chemically added.

michael king · May 13, 2019

I said weatherproof not waterproof.and I'm afraid you are mistaken bricks do have a weatherproof hard outer layer without adding chemicals.....
A quote from bricks & Brass............
Caring for Your Brick Walls.
However, if you have a damp problem, removal is still the best solution. Sand-blasting and other abrasive methods are not safe for most brick walls; they damage the hard outer skin of the brick, allowing erosion of the softer core.

Every days a school day

Spoon · May 13, 2019

michael king said:
I said weatherproof not waterproof.and I'm afraid you are mistaken bricks do have a weatherproof hard outer layer without adding chemicals.....
A quote from bricks & Brass............
Caring for Your Brick Walls.
However, if you have a damp problem, removal is still the best solution. Sand-blasting and other abrasive methods are not safe for most brick walls; they damage the hard outer skin of the brick, allowing erosion of the softer core.

Every days a school day

Well bugger me... It does say that... Soz for misquoting you mate. I actually read it as 'waterproof'

Squid · May 13, 2019

michael king said:
I said weatherproof not waterproof.and I'm afraid you are mistaken bricks do have a weatherproof hard outer layer without adding chemicals.....
A quote from bricks & Brass............
Caring for Your Brick Walls.
However, if you have a damp problem, removal is still the best solution. Sand-blasting and other abrasive methods are not safe for most brick walls; they damage the hard outer skin of the brick, allowing erosion of the softer core.

Every days a school day

So when is it "Hug a Brick" day to show that you care?