Thinking about making the switch to induction cooking? You’re not alone.
Thousands of Australian households are ditching gas cooktops and traditional electric cooktops for the speed, safety, and efficiency of induction. But before you start shopping for your new cooktop, there’s one thing that trips people up more than anything else – the power supply. Getting it right means a smooth install and years of happy cooking. Getting it wrong can mean delays, extra costs, or worse. Let’s walk through everything you need to know.
How Induction Cooktops Use Power (and Why It Matters for Wiring)
Induction cooktops heat the cookware directly using a magnetic field rather than heating the glass surface first. This makes induction cooking fast and energy efficient.
But that performance also means induction cooktops can use a fair amount of power. Most models draw between 3 kW and 7.4 kW, depending on the number of cooking zones in use and whether boost mode is turned on.
For example, Goldline induction cooktops can boost a single cooking zone to around 3,000–3,600 W for faster boiling or searing.
For a typical higher-powered cooktop, you may need:
- 20–32 amps of available power
- A dedicated circuit for the cooktop
- A correctly sized circuit breaker and cable
You don’t need to work these details out yourself. A qualified electrician can check the cooktop’s total power requirements and make sure the right wiring and circuit are installed.
Goldline installation manuals also list the maximum power draw and connection requirements, giving your electrician the information needed to install the cooktop correctly.
Electrical Requirements and Standards in Australia
Most Australian homes have 230–240 V single-phase power, which is suitable for most residential induction cooktops, including Goldline models.
Generally, an induction cooktop will need:
- A dedicated circuit connected to the switchboard
- A correctly sized circuit breaker and wiring
- Appropriate electrical safety protection
Larger or more powerful cooktops may require three-phase power, although this is uncommon in standard Australian homes.
All installations must comply with AS/NZS 3000 Wiring Rules and be completed by a licensed electrician. Your electrician will determine the correct circuit, wiring and safety requirements for your chosen cooktop and provide the required compliance certificate after installation.
Dedicated Circuit, Circuit Breaker, and Isolation Switch
The heart of a safe power supply for an induction cooktop is three things working together: a dedicated circuit, a correctly sized circuit breaker, and an isolation switch.
A dedicated circuit is simply a run of electrical wiring from your switchboard that serves only the induction cooktop. No dishwashers, ovens, or shared power points. A dedicated circuit for induction cooktops must not share power with other appliances. Here’s why that matters:
- A dedicated circuit prevents nuisance tripping when other appliances start up.
- It ensures the cooktop always has enough current at full power or boost, delivering stable power and optimal performance.
- It reduces overheating risk in cables and connections.
Circuit breaker sizing:
- Many 60 cm induction cooktops fall in the 20–25 A range.
- Larger 75–90 cm units around 7.4 kW often require a 32-amp circuit breaker.
- Most cooktops require a dedicated circuit rated for 32 amps, and most high-power induction cooktops need a hard-wired connection.
- Induction cooktops usually require a circuit rated between 20 A and 50 A, so final sizing must follow the manufacturer’s instructions and AS/NZS 3000 calculations.
Higher amperage breakers and larger cable size may be needed for powerful multi-zone cooktops or long cable runs. Heavy-gauge copper wiring is needed for induction cooktops to handle these loads safely.
The isolation switch (sometimes called a “kill switch”) is another non-negotiable. An accessible isolation switch is required for induction cooktops so power can be shut off quickly in an emergency.
- A dedicated isolation switch must be installed within two meters of the cooktop but not directly above the cooking surface.
- It needs to be clearly visible, labelled, and easy to reach.
- It can sometimes replace or be combined with an existing nearby outlet position if suitable.
Wiring, Switchboards, and When You Need an Upgrade
Here’s the reassuring part: many Australian homes can support a new induction cooktop with relatively minor changes. But older wiring and small switchboards sometimes need attention first.
The basics of electrical wiring for a cooktop:
- Cable runs from the switchboard to the isolation switch, then to the induction cooktop.
- Cable size is chosen based on amperage, length, installation method (in wall, in ceiling, in conduit), and allowable voltage drop under Australian standards.
For many residential induction cooktops, a 6 mm² copper cable is common. Longer runs or higher-load models might need 10 mm² to stay within the 5% voltage drop limit. Voltage drop considerations must be made for long cable runs – if voltage drop is excessive, your cooktop may not reach full boost output, or your lights flicker when it’s running.
Home electrical panel capacity must be assessed before installing an induction cooktop. Switchboard upgrades may be necessary for older homes.
Common signs your existing switchboard needs a switchboard upgrade:
- Old ceramic fuses with no safety switches (RCDs), or limited spare capacity on the board.
- Frequent breaker tripping or flickering lights when multiple appliances run together.
- Plans to add other big loads like an EV charger, large air-conditioning, or pool heat pumps alongside your new cooktop.
Your electrician will assess the main supply capacity by checking the main switch rating (e.g., 63 A or 80 A), looking at existing circuits’ load and available additional space for a new dedicated circuit, and recommending electrical upgrades to consumer mains or meter if total household load is increasing.
Goldline’s electrical wiring guide provides clear requirements so your electrician can quote accurately on any needed cabling or safety switch upgrades.
Choosing & Installing a Goldline Induction Cooktop
Now that you understand the power side of things, choosing your new cooktop becomes a lot less stressful.
Matching size and power to your kitchen:
- Common Australian sizes include 60 cm, 75 cm, and 90 cm. Benchtop cut-outs are usually slightly smaller than overall dimensions.
- If you’re replacing an old cooktop – whether gas or electric – measure your current cut-out before ordering.
Reading the spec sheet: when you look at a Goldline induction cooktop product page, check for:
- Total connected load in kW (this tells you how much more power the unit can draw at peak).
- Whether the unit is single-phase only or multi-connect (single or three-phase).
- Recommended circuit breaker size and cable size notes, plus any additional features.
The typical installation journey in a few hours:
- Choose your Goldline induction cooktop model and confirm fit in your bench and cabinetry, checking required clearances.
- Send the model number and a photo of your switchboard to your electrician for a firm quote on the new dedicated circuit and any switchboard work.
- Have a licensed electrician disconnect and cap any old gas line (with a gasfitter if needed) and remove the old appliance.
- The electrician runs the new circuit, installs the isolation switch, connects the cooktop, and tests all zones and safety devices. A Certificate of Compliance is issued once everything checks out.
Ventilation and clearances: while induction cooktops don’t produce combustion fumes like gas, they still need ventilation for steam and odours. Goldline manuals specify minimum clearances under and around the cooktop (typically 50 mm underneath) for cooling the cooktop’s electronics and compliance with Australian standards.
Why Goldline?
- Induction cooktops engineered for Australian conditions and phase power supplies.
- Clear installation instructions that make it easy for electricians to comply with legal requirements.
- Modern safety features and efficient operation that compare favourably with older electric cooktops and gas cooktops.
Ready to cook smarter? Explore Goldline’s range of induction cooktops, then have a chat with your electrician about the dedicated circuit and power supply you’ll need. A smooth installation starts with the right cooktop – and the right sparky.
