# Circuit breaker vs safety switch: what’s the difference? 1. [Home](https://arlite.co/) 2. [Support](https://arlite.co/support/) 3. [Electrical](https://arlite.co/support/electrical/) 4. Circuit breaker vs safety switch: what’s the difference? **Browse support** [Support home](https://arlite.co/support/) [Solar](https://arlite.co/support/solar/)[View all](https://arlite.co/support/solar/) - [How does a solar power system work in a Brisbane home?](https://arlite.co/support/solar/how-does-a-solar-power-system-work-in-a-brisbane-home/) - [How do I turn off a solar inverter safely?](https://arlite.co/support/solar/turn-off-solar-inverter-safely/) - [Do solar panels work during a blackout?](https://arlite.co/support/solar/solar-during-power-outage/) - [Can I add a battery to my existing solar system?](https://arlite.co/support/solar/add-battery-to-existing-solar-system/) - [Hail or storm damage to solar panels: what to do](https://arlite.co/support/solar/hail-storm-damaged-solar-panels-what-to-do/) [Air conditioning](https://arlite.co/support/air-conditioning/)[View all](https://arlite.co/support/air-conditioning/) - [Why is my air conditioner not cooling or heating properly?](https://arlite.co/support/air-conditioning/air-conditioner-not-cooling-or-heating/) - [Why is my air conditioner leaking water inside?](https://arlite.co/support/air-conditioning/air-conditioner-leaking-water-inside/) - [Why does my air conditioner smell musty or like dirty socks?](https://arlite.co/support/air-conditioning/air-conditioner-smells-musty-dirty-socks/) - [Can solar panels run my air conditioner at night?](https://arlite.co/support/air-conditioning/can-solar-panels-run-my-air-conditioner/) - [What should I ask before getting an air conditioner installed?](https://arlite.co/support/air-conditioning/questions-to-ask-before-air-conditioner-installation/) [Electrical](https://arlite.co/support/electrical/)[View all](https://arlite.co/support/electrical/) - [Circuit breaker vs safety switch: what’s the difference?](https://arlite.co/support/electrical/circuit-breaker-vs-safety-switch/) - [Why does my circuit breaker keep tripping?](https://arlite.co/support/electrical/circuit-breaker-keeps-tripping/) - [Why does my safety switch keep tripping?](https://arlite.co/support/electrical/safety-switch-keeps-tripping/) - [Burning smell or hot power point: what to do right now](https://arlite.co/support/electrical/burning-smell-hot-power-point/) - [Why is there no hot water? Electrical faults explained](https://arlite.co/support/electrical/no-hot-water-electrical-checks/) [Costs and finance](https://arlite.co/support/costs-and-finance/)[View all](https://arlite.co/support/costs-and-finance/) - [How does interest-free finance work for home energy upgrades?](https://arlite.co/support/costs-and-finance/interest-free-finance-home-energy-upgrades/) - [What affects the cost of a home battery in Brisbane?](https://arlite.co/support/costs-and-finance/what-affects-home-battery-cost-brisbane/) - [Can I get compensation for a power outage in Queensland?](https://arlite.co/support/costs-and-finance/power-outage-compensation-energex/) - [How much does an electrician cost per hour in Brisbane?](https://arlite.co/support/costs-and-finance/electrician-cost-brisbane/) - [What affects switchboard upgrade cost?](https://arlite.co/support/costs-and-finance/switchboard-upgrade-cost/) [Electrical](https://arlite.co/support/electrical/) A circuit breaker protects wiring from overload while a safety switch protects people from electric shock; having breakers does not mean you have one. By Casey Midgley, Arlite Energy Last reviewed 30 October 2026 4 minute read **No DIY.** Electrical work must be done by a licensed electrician. Never open, repair, test or modify electrical equipment yourself, even if it looks simple. This guide explains what is happening; it is not a how-to. **On this page** 1. What does a circuit breaker do? 2. What does a safety switch do? 3. Why does having breakers not mean you are protected from shock? 4. How can I tell what I have? 5. Why does it matter? 6. Who can add or change them? 7. What does a licensed electrician check? 8. Frequently asked questions A circuit breaker protects the wiring in your home from overload and short circuits, while a safety switch protects people from electric shock by cutting power when it senses current leaking to earth. Having breakers does not mean you have a safety switch. A licensed electrician can confirm what your switchboard has. ## What does a circuit breaker do? Every circuit in your home is wired with cable designed for a limited amount of current. A circuit breaker cuts the power if too much current flows, so the cable does not overheat. It protects the building and the wiring, and it can reduce fire risk, but it is not designed to protect a person who is receiving a shock. ## What does a safety switch do? A safety switch, also called a residual current device, compares the current going out with the current coming back. If a small amount goes missing, for example through a person or through damp wiring, it cuts the power very quickly. Its job is to reduce the risk of serious electric shock. ## Why does having breakers not mean you are protected from shock? A person can receive a dangerous shock at a current far too small to trip a circuit breaker. That is why both devices exist, and why they are not interchangeable. Some modern devices combine both functions in one unit, and older boards may have ceramic fuses and no safety switch at all. If you are unsure what your home has Do not try to investigate inside the switchboard. If you notice a burning smell, buzzing, scorch marks, smoke or sparks, or anyone has had a shock, leave the area and call 000. If you are unsure whether your home has a safety switch, ask a licensed electrician to confirm it. ## How can I tell what I have? If you can see your switchboard without opening any cover, a safety switch usually has its own label and a test button, while circuit breakers are the narrow switches for individual circuits. If the cover is closed, leave it closed. Renters can ask the property manager or owner, and anyone can ask a licensed electrician to check and explain the board. The Electrical Safety Office describes safety switches at [electricalsafety.qld.gov.au](https://www.electricalsafety.qld.gov.au/electrical-safety-home/safety-switches). ## Why does it matter? Safety switches are widely recognised as an important protection against electric shock in homes. In Queensland, there are rules about safety switches in rental properties, which our article on rentals explains in general terms. If your board has no safety switch, or you are not sure, it is worth asking for a check. ### Who can add or change them? Installing or changing a safety switch or breaker is electrical work. In Queensland it must be done by a licensed electrician, and the Electrical Safety Office Queensland is the regulator. What you can safely check Look at, but do not touch or open, your switchboard. Note whether you can see labels, and take a photo to show an electrician. Check your property records, quotes or inspection reports for any mention of safety switches. ## What does a licensed electrician check? If you ask an electrician to look over your switchboard, they can tell you which protection devices you have, whether they are suitable for the circuits they serve, and whether the board is in good condition. They can also advise whether adding a safety switch or upgrading the board makes sense, for example before adding major new equipment such as air conditioning or an EV charger. Ask for documentation of any work done and keep it with your property records. If you only remember one thing, remember this: a breaker looks after the wiring, a safety switch looks after you, and your home should ideally have the right protection for both. If you are unsure, asking is far better than assuming. ## Frequently asked questions - Yes. Safety switch is the common Australian name for a residual current device, often shortened to RCD. - Not reliably. A breaker responds to large currents, while a dangerous shock can happen at a much smaller current, which is what a safety switch detects. - Not always. Older switchboards may have fuses or breakers only, so it is worth having a licensed electrician check. - They do different jobs, and homes commonly have both. A licensed electrician can tell you what your home needs. [Learn about Electrical](https://arlite.co/services/electrical/) ## Official guidance For the rules and safety information that apply to your home, go to the regulators and industry bodies directly. - [Electrical Safety Office Queensland](https://www.electricalsafety.qld.gov.au/) - [Energex](https://www.energex.com.au/) Was this helpful? Written by the team at Arlite Energy, a Brisbane business that designs and installs solar, air conditioning and electrical work for homes and businesses. We write these guides in plain English so you know what is happening in your home. ## Related articles - [ElectricalHow often should a safety switch be tested?A safety switch should be checked regularly. Have a licensed electrician test it, so you are not working inside or on the switchboard.](https://arlite.co/support/electrical/how-often-should-a-safety-switch-be-tested/) - [ElectricalWhy does my safety switch keep tripping?A safety switch keeps tripping when it detects current leaking to earth, such as from a faulty appliance or moisture; never bypass it.](https://arlite.co/support/electrical/safety-switch-keeps-tripping/) - [ElectricalDo rental properties need a safety switch in Queensland?Queensland rental owners generally must have safety switches protecting power point circuits; check the RTA and ESO for current rules.](https://arlite.co/support/electrical/safety-switch-rental-property-queensland/) - [ElectricalDo I need a switchboard upgrade?Old fuses, frequent tripping, burn marks, no safety switches or new solar, EV or air conditioning loads are reasons to ask about an upgrade.](https://arlite.co/support/electrical/do-i-need-a-switchboard-upgrade/) ## Still stuck? Tell us what is going on and we can arrange a call-out. [Book a call-out](https://arlite.co/contact/) On this page 1. What does a circuit breaker do? 2. What does a safety switch do? 3. Why does having breakers not mean you are protected from shock? 4. How can I tell what I have? 5. Why does it matter? 6. Who can add or change them? 7. What does a licensed electrician check? 8. Frequently asked questions --- **Arlite Energy**, Unit 1, 1468 Anzac Avenue, Kallangur QLD 4503. Phone [(07) 3062 9299](tel:+61730629299), email [info@arlite.co](mailto:info@arlite.co). Monday to Friday, 7am to 5pm. Page: https://arlite.co/support/electrical/circuit-breaker-vs-safety-switch/ Site index for agents: [llms.txt](https://arlite.co/llms.txt), [sitemap](https://arlite.co/wp-sitemap.xml), [developer resources](https://arlite.co/developers/).