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Thanks again for the feedback. Lectrician – why wouldn’t they connect the earth under the road if they had to wire the cable in anyway? The only reason I asked about whether the length of lead pipe would provide sufficient earth is that THAT is connected to my electricity consumer unit via...

Thanks guys "split concentric - TN-S", don't know what that means but maybe the grey box was also already there and they just put the new cable into it - I can't remember. What is Ze and how is it measured? Do I actually need an electrician to come in and do something? If so, it's a...

sorry, a GREY and a red come out of that.

Ok, well the earth stud on the wood was always there. There is no connector as you describe JohnD on the grey box, the copper wires just come out of the bottom behind the supply in. Since the box is sealed, I cannot see where the wire comes from - my guess was the casing of the supply cable...

How about this then? [/img]

Thanks Plugwash/JohnD Here's a photo of the supply.... Ignore the yellow object in the tails - just a pencil. The bare copper wires come out of main fuse and to the earthing stud. From there, the Green/Yellow earth going down goes to water pipe; The green cable going to the left...

Hi Just about to have our Water Mains changed to plastic (Thames Water renewal of Victorian mains). Their 'help' booklet says they have a team of specialist contractors and a phone number to help decide whether a new Electical Earth is needed when the plastic pipes are fitted - absolutely...