w_tom wrote:

Snip
IOW if water pipe is used for earthing, then another
dedicated electrode must also be installed. But if that other
dedicated electrode is installed, then water pipe earthing is
not required. In short, the water pipe is not sufficient for
earthing.


Did you write these words or not? You said that water pipe earthing is
not required and yet 250-50 says it is.
--
Tom H