In message , Dave Plowman
writes
In article ,
Steven Briggs wrote:
To quote from "Commentary on the IEE Wiring Regulations" (Paul Cook)
"There is particular requirement that the supplementary bonding itself
be carried out within the bathroom, simply that the parts themselves be
supplementary bonded. Supplementary bonding maybe installed underneath
floorboards, above ceilings or in an adjacent airing cupboard, as long
as it is accessible for inspection"

"Use can also be made of copper pipes as the supplementary bonding
conductor if the joints are electrically continuous"

Now that's interesting, as mine certainly is. So in theory, all the pipes
might be bonded to the bath and whatever by just one set of clamps?

Yes I think so.
Look at the drawings in the OSG, regs et al.
The bonding isn't all one piece of wire round everything.
There's a loop shower cpc - shower feed pipe - hot - cold - bath waste.
Another shaver point - sink hot - sink cold - sink waste.
Another radiant fire cpc - hot
Another cold - one side of radiator.

If, e.g, there was no shaver point & plastic waste to the sink, then I
don't believe there is a requirement for any bonding at the sink.
Hot & cold are link together by the bath loop, job done.


--
Steve