davita wroteThe problem was the master C/B was loosely wired and the heat built up to an explosive level.....it could have burned down the whole 30 storey building. I changed all the C/Bs in the box for better quality and double-checked the security of all the wires.
You must sleep much better at night knowing there's only another 29 floors and however many other apartments there are on your floor with faulty wiring ready to self-ignite?!
At least when it all goes up you can stand next to the pile of cinders with a self-satisfied grin and say "that wasn't my wiring".