How Often Should I Test My RCDs?
RCDs (Safety Switches) are designed to save lives by cutting power in milliseconds if an imbalance is detected. But like any mechanical device, they can seize up if not exercised regularly.
Important Safety Warning
A faulty RCD offers zero protection against electric shock. If it fails the push-button test, replace it immediately.
Common Signs & Symptoms
- Button feels very stiff when pressed
- Switch doesn't trip immediately when 'Test' is pressed
- Power doesn't restore when turned back on
- You can't remember the last time you tested them
Potential Causes
Why is this happening? Here are the most common reasons we see in WA homes:
- Dust and moisture build-up
- Internal mechanical wear
- Old 'Type AC' RCDs that don't detect modern DC faults
- Lack of regular maintenance
Troubleshooting Steps (DIY Safe)
- 1Press the 'Test' or 'T' button on each RCD every 3 months.
- 2The switch should snap to the 'Off' position instantly with a loud clunk.
- 3Reset the switch to the 'On' position and check that power is restored.
- 4If the switch does not trip, trips sluggishly, or won't reset, call an electrician immediately.
DIY vs Professional
In Western Australia, it is illegal to perform your own electrical work. While you can change a lightbulb or reset a switch, anything involving wiring or removing fittings must be done by a licensed electrician.
How we can help
If you haven't been able to resolve the issue with the steps above, it's time to call in the experts. Sparky Local carries the necessary diagnostic tools to identify the root cause quickly and safely.
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