running main bonding cable along same route as water

[ironer]

Our mains water enters in the cellar & then runs up the side of the cellar steps. Electricity comes in from the rear to the CU. Hence a longish run (15m) of main bond cable needs to run alongside the water pipe between CU and incoming water.

I am about to put Climaflex pipe insulation around the water pipe: What is the correct way of running the bond cable - ie (a) clip to pipe and cover both in Climaflex (b) clip cable to outside of Climaflex or (c) clip bond cable to wall away from the Climaflex? [(c) is the least convenient]

Thanks for any advice.

[Owain]

(c) is the correct way.

You could probably do (b)

I definately wouldn't do (a)

The job only has to be done once...

Owain

[Lobster]

What would you consider to be wrong with (a): just the fact that it's touching the pipe (why, cos it's already electrically connected to it?)

David

[Newshound]

Yes, and if there's enough current flowing in the bonding cable to make thermal insulation a bad idea, you already have a problem!

[Dave Liquorice]

Like has been said enough current in that conductor long enough to give thermal problems you have a much more serious problem elsewhere. I'd go against being under the insulation as the wire is then hidden and damage might not be obvious (vermin nibbling round the back etc). I think I'd go for b) outside but on the climaflex (assuming compatibilty between the plastics is OK).

[Andy Wade]

Wiring regulation 528-02-04 is the one usually cited as disallowing this sort of thing:

"Where a wiring system is to be installed in proximity to a non-electrical service it shall be so arranged that any foreseeable operation carried out on either service shall not cause damage to the other."

IOW a plumber may disturb the wiring, or an electrician the plumbing. So only method (c) complies with BS 7671, IMHO.