Mine gave up the ghost yesterday - no fuss, no explosions or smoke and fire - just died while drawing no more than 15 amps in total. Mind you it was probably a couple of decades old and it did get a nasty little jolt earlier in the day when the starter on one of the fluorescent lights in the garage blew up. The accompanying short tripped out the RCD and the 6A B-type MCB, so I think the fault current must have been well over 30A to have tripped the MCB in the time it would have taken the RCD to respond. The service fuse is only 60A for my supply. Has anyone else had any experience of service fuses going in similar circumstances, with a delayed action? How well do these things age?