Understanding the pattern speeds up a lasting fix:

1) It trips when a specific appliance runs

Typical culprits: kettles, heaters, microwaves, fridges, freezers, geyser elements, air-cons, pool or borehole pumps, and older power tools.
Likely cause: overload on a busy circuit, failing element/driver, start-up current on a marginal circuit, or earth leakage.
Right move: unplug the suspect, try reset once. If it holds, get that appliance or circuit checked.

2) It trips after rain or at night

Likely cause: moisture in outdoor sockets, garden junctions, wall lights, carport fittings, or exterior conduit. Night trips often point to lighting circuits or timed devices.
Right move: do not force resets. You need proper resealing, replacement of water-damaged fittings, and often a small reroute to keep water out.

3) It trips randomly during the day with “nothing on”

Likely cause: neutral/earth leakage from a failing driver, mixed neutrals in old renovations, or a breaker/RCBO nearing end of life.
Right move: a meter-driven isolation and DB tidy-up—guesswork won’t solve this one.

4) Main trips take the whole property down

Likely cause: cumulative leakage across circuits, poorly balanced phases (3-phase), or a major fault.
Right move: systematic isolation so essentials come back first, then targeted repairs.