Help with Shed Wiring

[GMES]

@madspark This is a quick guide that I had on the laptop to give you an idea of what Darkwood was talking about with different earthing systems.

 

[Spoon]

As for the t&e use it to wire what you need in the shed. Nothing gets wasted then.

To add to the above: Sell what is left over on Ebay or here on this forum.

 

[Taylortwocities]

For buried SWA, you are looking at a nice trench. Comme ca:

 

[madspark]

Thanks for you help!

I'm going to go down the SWA route as it will offer better protection. I have dug a trench around 400mm deep.

6mm 3 Core SWA Steel Wire Armoured Cable 30M BASEC Approved XLPE On DRUM - http://www.ebay.co.uk/itm/182194766409?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Would that be a suitable cable to use? I've been advised to use 3-core. My consumer unit has a mixture of old and new cable colours.
With regards to the new colours what would be the best practice? I was thinking:

• Brown as live.
• Black as neutral with blue sleeving
• Grey as earth with yellow/green sleeving.

Does this sound acceptable?

 

[Spoon]

Seeing that you have a trench now you way want to consider putting a small cable duct into it, along with your SWA cable. Then you can put alarm (for shed door), Ethernet, phone cables in it, if they are needed.

 

[telectrix]

that cable is fine, but first check with a local wholesaler. most will cut whatever length you need and price per metre. i'd expect to pay £1.60/m +VAT. so his price is reasonable.

brown as live.grey with blue sleeve for N and black (sleeved Gn/Y) for cpc is the generally accepted practice, although not set in stone. the reason here is to dissassociate black from Neutral as it was with "real" colours.

 

[Taylortwocities]

And don't forget that the steel armour must also be connected to earth. Using a proper SWA gland, of course!
Here's how

 

[telectrix]

use CW20 glands, not the cheap BW version.

 

[Deleted member 26818]

The convention now is to use the grey as neutral, to disassociate black from neutral.
Should really sleeve or tape the correct colours near to the terminations.

 

[telectrix]

the term "new cable colours" is a misnomer in what is supposedly a technical and accurate industry. black and grey are both completely monochromatic and neither contain any colour whatsoever. they should be referred to as "new cable shades".