Copper Pipe - for Cross Section.

[kai]

What is the cross section area of 15mm copper piping, i.e. the rising main from my water supply to my cold water tank?

I always wondered would it be be sufficient to comply with BS7671:2001 and its earthing requirements in a domestic home.

 

[securespark]

You CANNOT use a water pipe as a means of providing an earth to your installation.

 

[plugwash]

it used to be allowed but the problem is that maintinace work can replace most of the water pipe with plasic liaving you with a very poor earth

 

[securespark]

it used to be allowed

I shall stick my neck out here and say that this is indeed true, but last appeared in the 14th Edition, which by memory, was issued the year I was born.

I stand corrected if I am wrong.

 

[kai]

I was asking that because I was thinking whether I could run the bathroom supplementary bonding to the rising main, (as it is already main bonded at the incoming position), instead of a 25 metres long run of 4mm cable all the way back to the main fuse box.

 

[ban-all-sheds]

You don't need to do either - there is no requirement to connect the supplementary bonding back to the CU or the MET.

 

[kai]

Thanks for that.

 

[securespark]

Phew!

Glad we sorted that one out.....!