How to reset a circuit breaker after a power overload
Learn how to reset a circuit breaker after a power overload safely. Follow Australian switchboard safety guidelines, unplug loads, and restore power.
Quick answer
To reset a tripped circuit breaker, unplug all appliances on the affected circuit, locate the switchboard, push the breaker switch fully to OFF, and then flick it to ON. Under AS/NZS 3000, persistent tripping signals a short circuit or dangerous overload requiring inspection by a licensed electrician.
- Skill level
- Beginner
- Time
- 5-15 minutes
- Trade
- Electrical
- Updated
- 4 November 2026
Tools you will need
- Ledlenser P7 Core - LED Inspection Torch
- Milwaukee 2011R - Rechargeable Headlamp
- Fluke 1AC-II VoltAlert - Non-Contact Voltage Detector
- Cabac K10 - Switchboard Enclosure Key
- Stanley 1000V VDE - Insulated Slotted Screwdriver (for panel inspection only)
⚡ Resetting a Circuit Breaker After a Power Overload
How do you reset a circuit breaker after a power overload in Australia?
This guide explains how to safely identify and reset a circuit breaker that has tripped due to a power overload. A tripped breaker is a safety mechanism designed to protect your electrical system from damage and prevent fires when too many appliances draw power simultaneously on a single circuit. Understanding this process can help restore power quickly and safely.
What skill level do you need to reset a tripped circuit breaker safely?
Beginner — Estimated time: 5-15 minutes
What tools do you need to reset a circuit breaker after it trips?
Torch/Flashlight: For visibility in potentially dark areas (e.g., garage, cupboard where the switchboard is located). Non-contact Voltage Tester (NCVT): To confirm power is off before touching anything, though not strictly necessary for resetting a breaker, it's good practice for any interaction with electrical systems.Materials Required
None (unless replacing a faulty appliance, which is outside the scope of this guide).What safety rules apply before you reset a circuit breaker?
⚠️ Safety First: Electrical work in Australia must be performed by a licensed electrician. This guide is for understanding the process and selecting the right tools and materials. Isolation: Never attempt to bypass or force a circuit breaker back on if it immediately trips again. This indicates a persistent fault that requires professional attention. Water: Ensure the area around the switchboard is dry. Do not touch electrical components with wet hands or while standing in water. Lock-out/Tag-out: While not typically applicable for a simple breaker reset in a residential setting, the principle of ensuring power is off and cannot be accidentally re-energised is paramount for any electrical work. AS/NZS 3000: All electrical installations in Australia must comply with AS/NZS 3000:2018 Electrical Installations (known as the Wiring Rules).What are the steps to reset a circuit breaker after an overload?
How do you identify which circuit breaker has tripped?
1️⃣ Locate your main switchboard (fuse box). This is typically found in a garage, laundry, hallway cupboard, or outside wall.
2️⃣ Open the switchboard door. Inside, you'll see a row of switches.
3️⃣ Look for a switch that is in the "OFF" or "TRIPPED" position. Circuit breakers usually have an "ON" and "OFF" position. A tripped breaker will often be in an intermediate position, or clearly in the "OFF" position, different from the others. Some may have a small indicator window that changes colour.
4️⃣ Note the label next to the tripped breaker. This label indicates which part of your home the circuit supplies (e.g., "Kitchen Power," "Lights Downstairs," "Hot Water"). This helps identify which appliances caused the overload.
Step 2: 🔌 Unplug Overloading Appliances
1️⃣ Before attempting to reset the breaker, unplug or switch off appliances on the affected circuit. If the label indicated "Kitchen Power," unplug the kettle, toaster, microwave, etc. If it was "Bedroom Power," unplug heaters, hair dryers, or multiple chargers.
2️⃣ Reduce the load. The goal is to remove the cause of the overload before resetting the breaker.
Step 3: 🔄 Reset the Circuit Breaker
1️⃣ Firmly push the tripped breaker completely to the "OFF" position first. This ensures the internal mechanism is fully reset.
2️⃣ Then, firmly push the breaker to the "ON" position. You should feel a distinct click.
3️⃣ Check if power has been restored. Look for lights coming back on or appliances powering up.
Step 4: 💡 Gradually Reintroduce Appliances
1️⃣ Once power is restored, plug in and switch on appliances one by one.
2️⃣ Monitor the circuit. If the breaker trips again immediately, you still have an overload, or there's a fault with one of the appliances or the circuit itself.
3️⃣ If it trips again, unplug the last appliance you connected. This indicates that appliance is likely faulty or was the one that caused the overload.
Common Mistakes to Avoid
Pro Tips
💡 Label Your Switchboard: Clearly label each circuit breaker with the areas or appliances it controls. This saves significant time during fault-finding. 💡 Understand Your Circuits: Learn which circuits power which parts of your home. This helps you distribute high-wattage appliances (like heaters, kettles, microwaves) across different circuits to prevent overloads. 💡 Investigate Repeated Trips: If a breaker trips frequently without an obvious overload, it could indicate a faulty appliance, a wiring issue, or an undersized circuit. Contact a licensed electrician. 💡 RCD vs. Circuit Breaker: Understand the difference. A Residual Current Device (RCD or safety switch) trips due to an earth leakage fault (e.g., electric shock risk), while a circuit breaker trips due to overload or short circuit. Both are crucial safety devices.Recommended Tools
Fluke 1AC II VoltAlert Non-Contact Voltage Tester: Reliable and easy to use for quick voltage checks. LED Headlamp: Keeps your hands free while working in dark switchboard areas.🔒 Licensing: Remember, any electrical work beyond simply resetting a breaker, such as replacing a faulty breaker, installing new circuits, or investigating persistent faults, must be performed by a licensed electrician. Refer to your state's regulatory body for licensing requirements: NSW Fair Trading, VIC ESV, QLD ESO, WA EnergySafety, SA Consumer and Business Services, TAS Consumer, Building and Occupational Services, NT Building Practitioners Board, ACT Access Canberra.
Frequently asked questions
- How do you reset a tripped circuit breaker in Australia?
- To reset a tripped circuit breaker, disconnect or switch off appliances on the affected circuit, then push the breaker handle firmly to the full OFF position before flipping it back to ON. If the toggle does not latch or trips immediately, disconnect power and engage a licensed electrician.
- What does a tripped circuit breaker look like on an Australian switchboard?
- A tripped circuit breaker sits in an intermediate neutral position or points toward OFF, breaking alignment with adjacent active switches on the switchboard DIN rail. Modern Clipsal or Hager miniature circuit breakers often display a mechanical trip indicator window shifting from green or black to red upon disconnection.
- Why does my circuit breaker keep tripping immediately after resetting?
- A circuit breaker that trips instantly indicates an unresolved electrical overload, an internal short circuit, or a grounded neutral fault within the circuit wiring. Never force the breaker handle into the ON position. Repeated tripping activates the thermal-magnetic protection specified under AS/NZS 3000 to prevent cable overheating and structure fires.
- Is resetting a circuit breaker considered illegal unlicensed electrical work?
- Resetting an external switchboard breaker toggle is classified as basic consumer operation and is legal for homeowners and trades across all Australian states. However, removing switchboard escutcheon panels, replacing breakers, or altering fixed wiring is regulated electrical work that requires an electrical licence under state Electrical Safety Acts.
- What is the difference between a tripped circuit breaker and a safety switch?
- A circuit breaker trips to protect electrical cabling from thermal overloads and short circuits, whereas a safety switch or Residual Current Device detects current leakage to earth to prevent electrocution. Safety switches feature an integrated mechanical test button, while standard thermal-magnetic circuit breakers have a single reset toggle switch.
- Which Australian standard applies to circuit breaker installations?
- Switchboard circuit breakers and overload protection devices are governed by AS/NZS 3000:2018, known as the Australian/New Zealand Wiring Rules. This standard mandates appropriate current ratings, fault-interruption capacities, and selective coordination across domestic and commercial switchboards to safeguard sub-circuits against sustained thermal overload damage.
Written by Sparky, the Electrical specialist at Aus.Tools.