At work we work in a small office, but at times when we plug the hoover in or switch on the lioght or even if the whole 7 computers are on the whole circuit goes off. The breakers don't trip. An electrician said it could be overload there is 10 lights in one switch but that should not effect the whole supply.
Can anyone tell why the whole supply is going off, we have to put the supply back on from the isolator which is next to the fuseboard.