A breaker that trips once might be a coincidence. One that keeps tripping is telling you something specific. Here is what the causes usually are.
Circuit breaker vs earth leakage - different faults
A circuit breaker trips when a circuit is overloaded or there is a short circuit. An earth leakage (ELCB) trips when current is leaking to earth - which happens when insulation has failed, a fitting is wet, or there is a fault in an appliance. These are different faults needing different diagnoses.
Overloaded circuit
If a breaker trips when you switch on a specific appliance, the circuit is likely overloaded - too many high-draw devices on one circuit. The solution is either to reduce the load or to add a dedicated circuit for the high-draw appliance. A kettle, washing machine and dishwasher all on the same 16A circuit is a common culprit.
Faulty appliance causing earth leakage
If the earth leakage trips when a specific appliance is switched on, that appliance has a fault. Unplug it, reset the ELCB and test one appliance at a time to find which one is causing the trip. Old water heaters, washing machines and geysers with degraded elements are frequent causes.
Wiring fault or damaged insulation
If the earth leakage trips without any obvious appliance causing it, or if a circuit breaker trips immediately when reset, there is likely a wiring fault. This needs a qualified electrician with the right test equipment to locate. Do not repeatedly reset a breaker that trips immediately - it is protecting you from something.
Frequently Asked Questions
Is it safe to keep resetting a tripping breaker?
Once is reasonable to rule out a transient event. If it trips again, stop resetting and call an electrician. Repeated resetting risks a fire if the fault is in the wiring.
My earth leakage trips every morning. What causes that?
A common cause is a geyser element that has developed a fault and causes an earth leakage when it heats. Also check for outdoor fittings that may be wet from overnight dew.
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Electrical in Bloemfontein