A while back I tried to describe the various earthing/grounding methods used in Britain. I've since sent some rough sketches of the different arrngements to Bill and he's kindly scanned them to post.
For those interested, I'll explain one at a time with the aid of the diagrams.
Diagram #1 link:
https://www.electrical-contractor.net/forum/international/UK_OldUrban1.gif This is the old urban distribution system using armored undergound cables. The neutral is grounded only at the xfmr, and the house ground is via the cable armor back to the same point.
I've shown all the usual components at the house service, but for simplicity I've omitted the isolators and fuses that would be at the xfmr.
[This message has been edited by pauluk (edited 10-13-2001).]
