On Wed, 18 May 2005 19:12:13 +0100, Dave Plowman (News) wrote:

The 100KVA genny simply parked on concrete with its earth rod under
one front wheel.

That is "normal".

Each 'CU' has a main RCD, and RCDs feeding each circuit from it.
Neutral not tied to earth - although I'm told some do.

With *everything* through RCDs the N - E bond is not quite so
important. A L - E fault will probably cause a big enough inbalance to
trip one of the RCDs. Even if it doesn't anyone coming into contact
the now "live" E will trip the RCD.

--
Cheers
Dave. pam is missing e-mail