Hints & Tips
Identifying the various parts of a consumer unit #1
In this example, the Main Switch is on the left hand side and will disconnect the whole supply.
There are then 5 individual circuits with a Circuit Breaker each. These circuit breakers are designed to trip off when too much current is used on that circuit. This can happen if you connect too many items to the circuit or if there is a fault that allows too much current to flow.