by ericmark »
Thu Aug 11, 2011 6:17 pm
Unlikely as most homes have a final ring using 2.5mm twin and earth and to up rate the MCB to 40A would likely overload part of the circuit.
Even in my four bedroom house I still as original had a single 30A fuse supplying all sockets. This was swapped latter for a B32 MCB.
The only time it has tripped is when some equipment has failed and has at the same time blown the 13A fuse supplying the equipment.
So clearly there is a fault some where. Any fixed equipment over 2kW should have it's own dedicated supply. I have seen where kitchen fitters for example have plugged in the oven into ring main. I have also seen where the immersion heater has been plugged in rather than having dedicated supply.
But living in a caravan (Not holiday) I was able to run all on a 16 amp supply with oven and hob being gas.
So there is something wrong to be tripping out a B32 MCB.