Why do my circuit breakers keep tripping?

A breaker tripping is protection working, not failing. The useful question is which of three conditions triggered it, because they mean different things.

An overload means the total current on that circuit exceeded its rating. It is the most common cause and typically trips after a delay rather than instantly, often when one more appliance is switched on. Kettles, heaters, irons and hairdryers draw heavily, and several on one circuit will exceed it. The fix is redistributing load rather than fitting a larger breaker, which would allow the wiring to carry more than it was sized for.

A short circuit trips instantly and hard, usually with a bang or a visible flash. This is a genuine fault in an appliance or the wiring and needs investigating rather than resetting repeatedly.

An earth leakage trip, from a residual current device, means current is escaping to earth. This is the safety device that protects people rather than wiring. Common causes include a faulty appliance, water ingress in an outdoor socket or bathroom, or a damaged cable. Cumulative small leakage from many appliances can also add up to a trip without any single one being faulty.

The practical diagnostic is straightforward: unplug everything on the circuit, reset, then reconnect items one at a time until it trips. That identifies an appliance fault quickly, and appliance faults are the majority of cases.

If it trips with nothing plugged in, the fault is in the fixed wiring and belongs with a qualified electrician. So does any breaker that will not reset, or one that trips repeatedly with no identifiable cause. Electrical work carries real risk and is regulated in most places for good reason.