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

[catdog1121]

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.

 

[Yozza19]

You will get 6mm Pritty tight on a corner it’s only a shoe lace

 

[Pete999]

You will get 6mm Pritty tight on a corner it’s only a shoe lace

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

 

[Dustydazzler]

i have seen guys dress swa with a rubber mallet quite successfully , I reckon 6mm should be fine round the outside corners. 1 piece of cable is much better than faffing about with conduits and wiskaboxes

 

[Pete999]

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

Make an internal Hypothetical Hypotenuse in the right angle formed by the corner of the wall. fathom that out if you can. Ergo make the angle shallower by cutting away some of the brickwork, and make the angle lower than 90 degrees.

 

[Wilko]

Hi - I run through roof space and exit where it will come down the wall.

 

[HappyHippyDad]

Even though 6mm swa is not a huge cable it will still not look great trying to bend it around 90degrees as it will bulge out at the sides. I expect you could force it into position but that would not be good for the cable over time. I would take a small notch out of the side of the wall so that it fits around smoothly.
Start with a very small notch, pop the cable in to see if it looks ok and gradually make the notch larger as required.

 

[freddo]

Ergo make the angle shallower by cutting away some of the brickwork

I would take a small notch out of the side of the wall so that it fits around smoothly.

When I suggested that in another thread, everyone complained that was shoddy!

 

[HappyHippyDad]

When I suggested that in another thread, everyone complained that was shoddy!

The regs have changed since then.

 

[telectrix]

or drill a 20mm hole through the corner brick as 45 degrees. chamfer the ends of the hole a bit,

 

[HappyHippyDad]

or drill a 20mm hole through the corner brick as 45 degrees. chamfer the ends of the hole a bit,

Have you ever actually done that Tel? I've thought about it but it just seems a bit too extreme to get a cable around a corner! Guess it could look pretty neat though.

 

[telectrix]

done it a couple of times.with carefull fettling (if that's thr right word) of the entry and exit points, you can get a nice bend on the cable. and if it's an old terrace house, it won't fall down like a new build would when you drill holes.

 

[ferg]

A slight change in height helps a bit.

 

[FatAlan]

done it a couple of times.with carefull fettling (if that's thr right word) of the entry and exit points, you can get a nice bend on the cable. and if it's an old terrace house, it won't fall down like a new build would when you drill holes.

Love that word ‘fettling’. The carpenter that worked on my house, an old Yorkshire git, used that word. Knew every trick in the book and made templates for everything.

 

[Andy-1960]

Unless you can introduce a change in height at the same time, i.e. a vertical 'S' as it rounds the corner, then this is how it is.

 

[Toneyz]

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]

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]

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]

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

 

[Squid]

Use Pyro........

 

[GBDamo]

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]

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

 

[Marvo]

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

 

[michael king]

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

 

[Spoon]

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]

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]

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]

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?

 

[Squid]

Anyways, todays bodge.........

 

[Spoon]

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

Every day... You don't get rejected by a brick..

 

[Squid]

Every day... You don't get rejected by a brick..

A bit like when you where young and you did a fat bird a "favour"?

 

[Spoon]

A bit like when you where young and you did a fat bird a "favour"?

Whats wrong with going with a big lasses?

 

[Squid]

Whats wrong with going with a big lasses?

Everything.......... ;o)))))

 

[telectrix]

Everything.......... ;o)))))

rather have something to get hold of than a skinny anorexic size 10 southern wench. then bones don't half dig in.

 

[Squid]

rather have something to get hold of than a skinny anorexic size 10 southern wench. then bones don't half dig in.

At your age the only thing that you can get your two hands around is a bottle of White Lightning and you spill half of it anyways....... ;o))))))

 

[Squid]

rather have something to get hold of than a skinny anorexic size 10 southern wench. then bones don't half dig in.

Size 10 is a tad chubby, size 8 mate.........

 

[telectrix]

size 8? that's teen age jail bait. anything under size 16 is anorexic. then again, .london is that crowded, no room for curvaceaous women.

 

[Spoon]

Size 10 is a tad chubby, size 8 mate.........

Everyone to their own mate.
I like women to look like women, not 9 year old boys....

 

[telectrix]

yep.size 8.... pair of bee stings and an arse like next door's cat.YUK.

 

[Squid]

Everyone to their own mate.
I like my women to look like a 60 year old 22 stone male Northerner just leaving the dole office in their shell suit, not like 9 year old boys....

errrrr okay whatever rocks your boat....... maybe we need a Readers Wives page......