SWA cable

[stocco]

I want to run a length of SWA to my garden shed, but am not sure whether it should be 2 core with the steel braiding used as the earth or three core using one of the three cable as earth.
Any help would be appreciated.
Cheers

 

[stephenf8542]

I go for 3 core,the steel wire is used for mechanical protection as well as a supplimentary earth. Imagine digging your garden and hitting the cable with your spade it would damage your earth if thats all you had

 

[rebuke]

It depends on a couple of factors - firstly the size of the SWA (above a certain size you'll find the capacity of the armour is not enough to act as an CPC), and secondly personal choice - some people prefer to use a separate core as the CPC even if it's not necessary...

Incidentally I assume you will be notifying this work to your LABC under Part P of the building regs?

 

[ban-all-sheds]

I'd go for 3-core SWA, use one core as the cpc, but obviously still earth the armour.

If you intend DIYing this, do you know enough about circuit design, installation techniques & rules, and the issues associated with different earthing systems and outbuildings to be able to specify on your application for Building Regulations approval how you'll comply with P1?

 

[stocco]

Many thanks to you all for your help and advice and for taking the time out to reply. 3 core it is then!
Cheers