Frequently Asked Questions about RCD Safety Switches

A Residual Current Device (RCD) safety switch is a critical electrical safety device required in all Australian homes built since 2000. Its primary role is to protect against electrocution, electrical shocks, and fires, making it an essential feature for every home.

RCDs monitor the flow of electrical current in a circuit. If the device detects a leak in the current − such as when someone touches a live wire − it trips and cuts the power within milliseconds. This quick action prevents serious injuries and helps safeguard electrical equipment from potential fire hazards.

RCD switches trip when they detect an imbalance in the circuit. Common causes include:

  • Overloaded power boards or outlets
  • Faulty appliances (e.g., fridge, oven, charging cables)
  • Wiring damage caused by water leaks or faulty installations
  • Lightning strikes or power surges
  • Malfunctioning safety switches

If your RCD trips, try resetting it at the switchboard. If it stays on, the issue may have resolved itself. If it trips again, check for faulty appliances or damaged wiring. Unplug devices one at a time to identify the problem. If the issue persists, call Mr Emergency for professional electrical assistance to restore safety to your home.