Safety Switches

A safety switch (RCD) measures the current going out on the active wire against the current coming back on the neutral. If those don't match — because some current is leaking through a person, water or damaged insulation — it cuts power within milliseconds, often before a serious shock can occur. They're a critical second line of defence behind circuit breakers, which only protect against overload and short circuits.

Yes. Queensland regulations require safety switches on all power, lighting and air conditioning circuits in homes. Older homes with rewireable fuses or shared RCDs on only some circuits don't meet the current standard. The team can assess what's installed today and quote on bringing the board up to current legislation, prioritised by where the risk is highest.

Every three months by pressing the test button on each RCD, which simulates a fault and confirms the device trips. If it doesn't trip when tested, ring straight away — a non-tripping RCD is the same as not having one at all. A more thorough electrical test is recommended every five to ten years and can be combined with a periodic inspection if you'd like one.

Sometimes — it depends on whether the existing enclosure has space and bus-bar capacity to accept new RCD breakers. In many older Brisbane homes the right answer is a switchboard upgrade because adding to an undersized board is a short-term fix. The team will inspect what's there and give you both options on the quote so you can choose.

Modern installs use one RCD per circuit (an RCBO) so only the affected circuit drops out. Older shared-RCD installs take out several circuits at once, which is why a single fault can suddenly knock out half the house. Replacing a shared RCD with RCBOs is a common upgrade that makes faults much easier to locate.

Frequent tripping means either a faulty appliance is leaking current to earth or there's degradation in the wiring or accessories on that circuit. Don't reset and ignore — that's the safety switch doing its job. Ring through and the team will trace the cause systematically with a clamp meter and insulation resistance tester rather than guessing.

Yes. Current Queensland regulations require RCD protection on lighting circuits as well as power circuits — lighting was historically excluded but the rule changed because lighting faults in damp areas have the same shock potential. New work meets this standard automatically; older boards may need lighting RCDs added during an upgrade.