It never, ever fails to amaze me the number of "electricians" that haven't the first clue about the earthing arrangements present on the system they've either just inspected, just installed, just upgraded, or just taken a ---- all over.
It's all the more bloody ridiculous, to be honest, since you can bet your bottom dollar that the FIRST thing they ever heard regarding electrical education were the words ON SITE GUIDE.
And lo and behold, turn your On Site Guides to the first meaningful chapter, obviously, chapter 2 --------
There's barely half a dozen words before the nice little pictures start, which show VERY clearly how each type of system is set out.
On a related note - are we discussing the idiot that was on about upgrading a 6mm supplier's earth somewhere earlier? Scary, indeed.
If you don't know, don't f****ing touch.
Ho hum.....bug.