Published 2026-10-22 by Neighbourhood Electrician
If you live near the water in Bondi, Bronte, Clovelly, Coogee or Maroubra, a safety switch that keeps tripping is one of the most common electrical frustrations. It is also one of the most important to take seriously, because the safety switch is telling you something is wrong. Here is how to understand what it is telling you.
What a safety switch does
A safety switch (RCD) detects current leaking to earth, which could be through a person, and cuts the power in a fraction of a second. If it trips, it has detected something. The question is what.
Safety switches are different to circuit breakers. A circuit breaker trips when a circuit is overloaded or short-circuited, to protect the cable. A safety switch trips on a much smaller leakage, to protect people. Knowing which one tripped narrows down the cause: safety switches usually have a "Test" button on them.
Moisture and salt air
Near the beach, the most common cause is moisture in outdoor fittings: a corroded garden light, a balcony power point with a cracked cover, or an exhaust fan in a steamy bathroom. Salt air speeds up corrosion, and the problem gets worse after rain.
Places to check after a rain-related trip:
- Garden, path and deck lights, especially older fittings with perished seals
- Outdoor and balcony power points, and anything left plugged into them
- Light fittings under eaves or on exposed walls
- Exhaust fans and heat lamps in bathrooms
- Pool and spa equipment
Appliances
Fridges, kettles, washing machines and hot water systems can all develop faults that trip a safety switch. A quick test is to turn the safety switch off, unplug everything on that circuit, reset it and plug things back in one at a time.
If the trip happens when one particular appliance goes back in, that appliance is your likely culprit. Leave it unplugged and get it repaired or replaced. If the safety switch trips with nothing plugged in, the fault is in the fixed wiring or a hardwired appliance, and it needs an electrician.
Nuisance tripping
Sometimes a safety switch trips because too many appliances share it, and the small normal leakage from each adds up. This is common on older boards where one safety switch covers the whole house. Spreading the circuits across several safety switches on a modern switchboard fixes this, and also means one fault does not black out the whole home.
Never bypass a safety switch
It is tempting to stop a safety switch tripping by moving appliances to another circuit, or worse, having it bypassed. Don't. A safety switch that keeps tripping is protecting you from a fault that could cause an electric shock. The fix is to find the fault, not to remove the protection.
Test your safety switch
Press the "Test" button on each safety switch every few months. It should trip straight away. If it doesn't, it needs replacing. Reset it after the test and check that your clocks and appliances come back on.
When to call us
- It trips again immediately with everything unplugged
- It trips every time it rains
- You smell burning or see scorch marks
- You've had to reset it more than a couple of times
Don't keep resetting it. Call 0421 772 661 and we'll find the fault. More on our fault finding service.
Keeping beachside electrics healthy
Choose outdoor fittings and power points rated for weather exposure, keep covers closed, and replace corroded fittings rather than patching them. Having outdoor circuits checked every few years helps catch corrosion before it causes a trip in the middle of the night.