On Friday, 14 February 2020 11:23:46 UTC, TimW wrote:
On 13/02/2020 21:59, TimW wrote:
There was an ancient (1950s) steel pipe bringing mains water into my
house under the front room and then up in the cup'd under the stairs.
There there was a stop cock and it went into copper pipe and onto the
copper a large sleeved earth wire was connected with a tag on saying "Do
Not Remove".

The steel pipe was leaking so I have taken it all out and replaced with
blue plastic pipe. Was looking at the earth arrangement and wondering if
I need to earth the wiring in another way, into the ground or something,
or are we still earthed through the water in the plastic pipe out to the
outside world?

TW

This is the supply in the porch:
https://photos.app.goo.gl/ZhguWVyk5kZkbs1X9
Two substantial earth cables from the black box, one going to the box of
trip switches, the other just dangling, redundant from the old economy 7
circuit or something.

Can wiser eyes than mine declare the type of earthing arrangement?

RW

You've got a supplier earth with partial RCD cover. So the water pipe connection is equipotential bonding only. If the internal piping is metal, reconnect the earth coloured wire to the house metal water piping somewhere near where it enters the house and Robert becomes related.


NT