burying cable underground

[Click-Sure]

Ahh, Readers Digest, it must be right!

Edit:

Is SWA really that much more expensive than T&E and a load of conduit anyway?

I had a similar situation myself where more runs of SWA may need to be run. The solution: drain pipe, clearly marked that it carries electric cables.

 

[flameport]

... T&E cable routed through a buried PVC conduit system...

The book is wrong, because:
1. a spade will easily go through PVC conduit
2. buried conduits will fill up with water and T+E is not suitable for installing in permanently wet environments.

Unless the distance was very short so small size cable could be used, you wouldn't be able to get the T+E through the conduit anyway.

 

[streetlighter]

What is required is some Orange ducting to install the SWA cable(s) in then you can leave a drawrope in the duct for any future cabling. Also the ductwork can be used with inspection pits along the run.
Its what we use when running SWA cables between streetlighting columns fed from a private supply.

 

[ban-all-sheds]

What is required is some Orange ducting to install the SWA cable(s) in.

Why orange?

 

[RF Lighting]

Orange is only required for street lighting cables (and I beleive traffic lights)

Black ducting is the norm for LV cables.

 

[emphasis303]

ok guys

def going for the swa and pvc conduit underground im not tryina be a tight b**tard as i blive if u do it once properly it wont come back to bite u. But i wanted conduit mainly for the future ideas but since now im going to be placing the two lights back to back then i only need one conduit and will just run a smaller piece of of swa from one light to the other.

thanks for all the help, as usual the members here have been more than helpfull
cheers

edit:

one last thing is, is 1.5mm swa running a length of about 15 -20meters right for the job?

 

[Spark123]

Can't see much of an issue assuming they are fed from a B6 MCB, what wattage lamps are they?
I take it you know all about the part p thing

 

[emphasis303]

yep b6 mcb lamps are 500w and yep am aware of part p

edit

I just realised as im going to be coming off my upstairs light radial the demand on it might be too much, is 1200w the maximum on a lighting circuit at one time?

Currently there are two 500w already on this circuit which have been on since the house was rewire in the late 90s so I think ill be needing to add an mcb?

cheers