Often, you discover you have an electrical problem when you turn on an appliance and it won’t work. When that happens, the source of the problem may be the device itself, faulty wiring connections, an overloaded or a short circuit.
Overloaded circuit
A circuit becomes overloaded when there are more appliances and lamps on it than it can safely handle. When all the lamps and appliances are turned on, the wiring overheats and the fuse blows or the circuit breaker trips.
Short circuit
A short circuit occurs when a bare hot wire touches a bare neutral wire or a bare grounded wire (or some other ground). The flow of extra current blows a fuse or trips a circuit breaker.
Helpful Diagnostic Hint
Plug fuses provide a clue to what made them blow
- An overload melts the bridge.
- A short circuit blackens the glass.
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