We've recently had our old fusebox replaced with a consumer unit, which I find has a bit of a glass jaw when it comes to tripping.
So, about three times a week, it decides to cut off the power. The unit seems to be split into two - the top row has the big red master switch, and a bunch of switches concerned with lighting. The bottom row has switches relating to sockets, and to the left a "sub-master" switch.
It's this "sub-master" switch which decides to flip itself into the "off" position. Last night it happened sometime between 0315, when nature called, and 0805, when I woke half an hour late for a meeting.
This happens irregularly, and with no rhyme or reason. There's nothing coming on at that time on a timer, so far as I am aware.
How can I best set about isolating the problem? I'll probably need to get the sparks back to fix it, but it would be nice to be able to tell him what actually was going wrong.
Thanks
Edward