can you give more info? ie.has system got an R.C.D,is there anything that causes the trip to go like turning on 1light ,has the trip got a button on the front that you push in to reset,or has it got a lever you push up to reset ,different types of m.c.bs.
Thanks for your help. I just went through some checks, and tried each light that was wired up to that particular mcb. At the moment everything is working fine. having done that my wife has just told me that she had the tumble drier on a couple of days ago and the cupboard where the main box is got damp. Maybe it's just dried out??? Anyway fingers crossed now, and thanks again.