Safety Switch Faults
Faults in electrical wiring can cause serious problems such as fires or electrocution. Common causes of electrical faults are poor connections that over heat, faulty appliances, overloading, rodent damage, water egress, poor installation or damage to the electrical system.
3 Basic Faults
Short circuits, Earth faults and Overloads.
A short circuit occurs when an active wire and a neutral wire come in contact with each other, when this happens a large current flows causing the protective device to either blow (fuse) or trip (circuit breaker).
An earth fault occurs when an active wire comes into contact with the earthing system. Similar to a short circuit, a large amount of current flows in the circuit causing the protective device to operate.
Overloads occurs when too much load is applied to a particular circuit causing the protective device to disconnect the circuit.
None of these faults are overly difficult to diagnose. On the contrary an Earth Leakage fault is another story all together. Earth leakage is when a very small amount of current leaks from either the active or neutral circuit to earth. In South Australia that generally means any leakage that exceeds 30 milliamps. Isolating the offending item