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Old February 13th 20, 10:43 PM posted to uk.d-i-y
TimW TimW is offline
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First recorded activity by DIYBanter: Dec 2015
Posts: 801
Default Earthing through plastic pipe

On 13/02/2020 22:24, wrote:
On Thursday, 13 February 2020 21:59:54 UTC, 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?


Water is NOT an adequate earth. An old electrical install with no earth is not safe.

and because the pipework is earthed - that doesn't mean that the
incoming main is THE earth for the house, does it?