Quick answer
A breaker that keeps tripping always means something on that circuit is drawing more current than it should - overloading, a short circuit, or an earth leak. Never "fix" this by fitting a stronger breaker - that only removes the protection while the problem (and the fire risk) stays. If the breaker trips the instant you reset it, or you smell burning, switch off the main breaker and call an electrician.
A tripped breaker is normal, built-in protection doing its job - the fault isn't the breaker, it's whatever is causing it to trip. Here are the 6 most common causes.
1. An overloaded circuit
If a water heater, washing machine and iron are all running on the same circuit at once, the combined draw can exceed the breaker's rating (usually 10-16A for household sockets). The breaker trips to protect the cables from overheating. Fix: spread larger appliances across different circuits, or if the house simply has too few circuits for modern use, have the board reviewed and expanded.
2. A short circuit
When the live and neutral conductors touch directly (a damaged cable, an old socket), current spikes and the breaker trips instantly, usually refusing to reset right away. This is serious - it needs an electrician to trace the fault before power goes back on.
3. An earth leak (RCD trips)
If it's specifically the RCD (FID/FI) that trips, not an ordinary breaker, the cause is leakage - some current is taking the wrong path, often through moisture. Usual suspects: a water heater with damaged insulation, a washing machine in a damp room, or outdoor lighting without proper protection. Read more about RCD protection and why it's required.
4. A faulty appliance
Sometimes it isn't the wiring at all - it's the appliance itself: a water heater, washing machine, hairdryer, even a charger. A simple test: unplug everything on that circuit, reset the breaker, then plug items back in one at a time. Whichever one trips it is the culprit.
5. An old or mismatched breaker
Old ceramic fuses get unreliable with age and blow earlier than they should. Likewise, a breaker rated too sensitively for its circuit will trip even under normal load. Fitting a quality breaker with the correct rating usually fixes this for good.
6. A poor connection in the panel
A loose or corroded connection creates resistance, resistance creates heat, and heat can trigger the breaker - or worse, scorch the panel itself. This is one of the more common signs of a dangerous electrical installation and needs an urgent inspection, especially if you notice darkened or melted plastic around the breaker.
When it's urgent
Switch off the main breaker and call an electrician right away if:
- You smell burning or rubber from the panel
- The breaker is hot to the touch, or the plastic looks darkened or melted
- You see sparks when switching on
- The breaker trips immediately on reset, with nothing plugged in
What you can safely check yourself
Before calling an electrician, it's safe to: unplug everything on the circuit and try resetting the breaker; check whether the problem is on one circuit or the whole board; and, without touching anything, look for visible smoke or smell. Never open the panel itself or touch the wiring - leave that to a licensed electrician.
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Leave a requestConclusion
A tripping breaker is a signal, not a fault in itself - it's always worth finding out why. Most cases are harmless overloading, but a breaker that trips often, feels warm, and smells of burning together means it needs a professional look the same day.