Summary: Learn how to troubleshoot an overloaded circuit and how to fix a short circuit.
If power has been completely cut off to your house, locate the residual current device (RCD) in the consumer unit to see if it has tripped. If so reset it. If this fails to work, call a qualified electrician to diagnose the fault. If houses around you are experiencing a blackout, call the emergency number for your electricity provider.
If one of the miniature circuit breakers (MCB) trips, the most likely cause is overloading caused by using too many high-wattage appliances at the same time.
A short circuit is caused when there is an accidental connection between a bare live wire and a bare neutral wire, or a bare earth wire. The flow of extra current blows a fuse or trips a circuit breaker.
Author: C J Mills Google+
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