A funny thing about the AS/NZ plug with the round earth pin.
They were originally designed for dedicated circuits, like computers and so forth (to prevent things like heaters and vacuum cleaners being plugged into them).
So far, I've never ever seen one installed in any commercial building yet.
I have however been to a few offices where a heater or a vacuum cleaner has tripped a breaker, taking down a server.
Isn't technology marvellous!