Cheers dark wood for you reply I think yours is the way to go in the near future . At the moment I will fit the MCB to stop any problems thatcould happen in the meantime and gives me more time (have too much on at the moment ,doingdl sixty hours and more stuff being push on at the last minute ) fully test the current system . Ta for anyone who has replied as it can be hard to bounce ideals around when no one you work with has a clue what you talking about .