Induction cooktop power requirements

Why induction is popular

Induction cooktops heat the pan directly using a magnetic field, rather than heating the glass and then the pan. They're fast, precise, easy to clean and the surface cools quickly. More households around the Illawarra are switching from gas or older ceramic cooktops, particularly during kitchen renovations.

The catch is that an induction cooktop can draw a lot of power, and not every home is ready for it.

How much power they need

Full-size induction cooktops are commonly rated at around 7 kW or more, though the exact figure varies by model. That's far more than a standard power point can supply. Most need to be hardwired to their own dedicated circuit from the switchboard, often a 32 amp circuit, with cable sized for the load.

Smaller two-zone or portable induction units can plug into a standard outlet, but they're limited in power and not a replacement for a full cooktop.

Always check the installation manual for your model. It will state the circuit rating and cable size required. Have it handy before an electrician quotes.

Replacing a ceramic or electric cooktop

If you already have an electric cooktop, there's likely a circuit there. The question is whether it's rated high enough for the new induction unit. An older circuit might be sized for a lower-power cooktop, and in that case the cable and circuit breaker may need upgrading.

Replacing gas

Switching from gas means there's no existing electrical circuit to the cooktop. A new circuit needs to be run from the switchboard to the kitchen. The gas line needs to be capped off by a licensed gasfitter, which is a separate trade.

The switchboard

This is often the deciding factor. A new cooktop circuit needs space on the switchboard and safety switch protection. Older homes with ceramic fuses, or switchboards that are already full, may need upgrading first. Our switchboard upgrades page explains the signs a board has reached its limit.

The total load on your home

Your home's main supply can only deliver so much power at once. An induction cooktop, oven, air conditioners, hot water and a pool pump all running together can add up. Most homes cope fine, but in some older homes it's worth assessing the total load before adding major appliances.

Cookware

Induction only works with magnetic cookware. A fridge magnet that sticks firmly to the base of a pan means it'll work. Aluminium, copper and glass pans generally won't, unless they have a magnetic base. It's worth testing your favourite pans before the old cooktop goes, so replacing cookware doesn't come as a surprise.

Ventilation still matters

Induction doesn't produce combustion fumes like gas, but cooking still creates steam, grease and smells. A good range hood is still worth having, and it's often installed at the same time as the new cooktop.

Planning a kitchen renovation

If you're renovating, decide early whether you're going induction. Running the circuit while walls and cabinets are open is simpler. Customers have told us we fitted a range hood with a clear quote up front, and that clarity matters when you're juggling a whole kitchen budget. Our renovation electrical work fits in with builders and cabinetmakers.

Installation

Once the circuit is in place, the cooktop is connected to an isolating switch or directly to the circuit as the manufacturer specifies, then tested. The benchtop cut-out needs to match the cooktop, which is the cabinetmaker's or stonemason's job.

Let's check your kitchen

See our range hood and cooktop installation page for more.

Call or text Kalani on 0424 400 346. Send the model of the cooktop you're considering and a photo of your switchboard, and we'll tell you what's needed.