Myself and my Boss were having a rather lively argument yesterday over a submersible pump.
I certified a place recently where there was such a pump down 130 metres into the bore.
This pump-head is a 3-phase unit (230V) and has an Earth wire on it as well.
All the connections are hermetically sealed on it.
OK then, could someone please explain why it is required in my Boss's view that this pump be protected by a 4 Pole RCD @ 30mA.
Sure it is for a domestic water supply out in the rural parts of Canterbury, but there are lots of places here that don't have them (RCD's I mean).
What is your take on this?.