"Grounding diverts current harmlessly to earth in case of a circuit fault."
Ah, a real old favorite, like "electricity always tries to get back to earth."
"The 240 volt circuit has one neutral"
Even if it's running to a 6-15 or 6-20 receptacle?
Sadly, I've similarly confusing and downright wrong "advice" in some British DIY books. Somewhere in here I mentioned a DIY video tape on electrics that I found in the library some years ago. It was so bad I ended up contacting the chief librarian and asking that it be withdrawn as misleading at best, downright dangerous at worst.
