RCD tripping in wet weather at your Perth home? Why rain and moisture trip your safety switch, and how to fix it. Help from ACS Electrical.
RCD tripping in wet weather is a common and frustrating problem in Perth, especially after heavy rain or a storm. When you get RCD tripping in wet weather, it is almost always moisture finding its way into a circuit it should not. Here is why rain trips your safety switch, what to check, and when to call an electrician.
Why does rain trip my safety switch?
Your RCD, or safety switch, trips when it senses electricity leaking to earth. Water is a conductor, so when moisture gets into an outdoor outlet, light fitting or junction, it creates a leakage path and the RCD cuts power. That is why RCD tripping in wet weather is so common, it is the switch catching a genuine fault.
6 causes of RCD tripping in wet weather
- Moisture in outdoor power points or their seals
- Water in garden, path or feature lighting
- A pool, spa or pump circuit letting water in
- Damaged or perished outdoor cabling
- A faulty outdoor appliance left plugged in
- Cracked or unsealed weatherproof covers
Find the wet circuit
To narrow down RCD tripping in wet weather, unplug outdoor appliances and switch off outdoor lighting, then reset the safety switch. If it holds, the fault is in something you turned off or unplugged. If it trips again with everything off, moisture has likely reached the wiring or a fitting, which needs an electrician.
Outdoor outlets and covers
Outdoor power points should have weatherproof covers that seal when in use. Over time these crack or perish, letting water in, which is a frequent cause of RCD tripping in wet weather. A cracked cover, a loose fitting, or a point mounted where rain hits it directly will keep tripping until it is properly sealed.
Pools, gardens and alfresco
Pool and spa equipment, garden lighting and alfresco areas are common sources, because they live outside in the weather. If your RCD tripping in wet weather lines up with a sprinkler cycle or a downpour, one of these circuits is the likely culprit and should be checked and sealed by an electrician.
What not to do
Do not tape or wedge the safety switch on to stop it tripping, that removes the protection that prevents a shock, exactly when wet conditions make a shock more dangerous. If you cannot find and dry out the cause safely, leave the affected circuit off and call a licensed electrician.
When to call an electrician
If RCD tripping in wet weather keeps happening after you have unplugged the obvious culprits, the fault is in the wiring or a fitting and needs professional fault finding. An electrician can trace where water is getting in, reseal or replace the fitting, and make your outdoor circuits safe again.
Preventing it next time
Once the fault is fixed, a few steps reduce the chance of it returning: weatherproof covers on every outdoor point, fittings rated for outdoor use, and cabling in good condition. An electrician can weatherproof your outdoor setup so the next storm does not leave you resetting the board.
Storms and power surges
Heavy storms can also cause trips through brief surges or a nearby network fault, not just water. If a trip lines up with a thunderstorm and resets cleanly once the storm passes, a surge was likely the trigger. Persistent trips afterwards, though, still point to moisture that needs finding.
Why use a licensed electrician
Wet-weather faults often hide in outdoor wiring and fittings, so tracing them is licensed work. A licensed electrician finds where moisture is entering, fixes it, and confirms your protection works. The state’s Building and Energy sets the safety standards involved.
Dealing with RCD tripping in wet weather in Perth?
ACS Electrical finds the leak and fixes it across the metro. Explore our safety switch tripping guide, RCD requirements guide or common electrical faults guide. Call 0419 967 838.
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