What is a Safety Switch?
A safety switch, also known as a Residual Current Device (RCD), is a device designed to protect against electrical shocks by quickly cutting off the electricity supply if an imbalance is detected between the active (live) and neutral wires, indicating a potential leakage of current.
Types of safety switches
Residual Current Devices (RCDs)
Residual Current Circuit Breakers with Overcurrent Protection (RCBOs)
Earth Leakage Circuit Breakers (ELCBs)
Portable Safety Switches
How does an Electrical Safety Switch work?
An electrical safety switch, or Residual Current Device (RCD), works by continuously monitoring the electrical current flowing through the active (live) and neutral wires of a circuit. If it detects an imbalance, such as when current leaks through a faulty appliance or through a person’s body, the RCD immediately cuts off the power supply to the circuit within milliseconds. This rapid disconnection prevents electric shocks and reduces the risk of electrical fires, ensuring the safety of individuals and property.
How to reset the Safety Switch?
Before attempting to reset a safety switch, identify and address the cause of the trip (a faulty appliance, overloaded circuit, etc.). Once the issue is resolved:
Turn off all appliances on the circuit controlled by the safety switch.
Locate the safety switch, usually in your switchboard.
Flip the switch to the “off” position.
Wait a few seconds.
If the problem is fixed, try flipping the safety switch back to the “on” position. It should hold. If it trips again immediately, there’s likely a persistent electrical fault requiring professional attention.
Are safety switches compulsory in nsw rental properties?
Yes, safety switches are compulsory in rental properties in New South Wales (NSW), Australia. According to the NSW government regulations, safety switches must be installed on all power and lighting circuits in rental properties to ensure tenant safety.
Safety switch vs Circuit breaker
Safety switches protect you from electric shock by turning off the electricity within milliseconds when a current leak is detected. This can occur if there is a faulty power point, wiring, or electrical appliance in use. In contrast, circuit breakers and fuses protect the circuitry by cutting the power when too much current flows through the electrical wiring. Excessive current, such as from a surge or lightning strike, can overheat appliances or wiring and cause electrical fires. While circuit breakers and fuses do not directly protect people, safety switches save lives by providing personal protection against electric shock.
