Induction hobs are rapidly replacing gas and traditional electric cooktops in UK kitchens. Driven by energy efficiency goals, safety benefits, and modern design, induction cooking is now seen as the future of domestic kitchens. However, many homeowners still misunderstand how induction hobs work and what they require electrically.
This blog breaks down the technical side of induction hobs, their electrical demands, and what UK households need to know before installation.
How Induction Hobs Work
Unlike conventional electric hobs that heat the surface, induction hobs use electromagnetic fields to heat cookware directly. When a compatible pan is placed on the hob, an electric current passes through a copper coil beneath the glass surface, creating a magnetic field. This field induces heat directly in the pan base.
Because energy is transferred straight to the cookware, very little heat is wasted.
Electrical Requirements in UK Homes
Induction hobs are high-power appliances. Most UK models operate between 3.5 kW and 7.4 kW, with larger or professional-grade units exceeding this.
Key electrical considerations include:
- Dedicated circuit: Induction hobs must be connected to a dedicated cooker circuit.
- Cable size: Typically 6 mm² or 10 mm², depending on power rating.
- MCB or RCBO protection: Required to comply with BS 7671 wiring regulations.
- Double-pole isolator switch: Must be accessible and within two metres of the appliance.
Many older UK homes may need consumer unit upgrades or load assessments before installation.
Energy Efficiency Benefits
Induction hobs are among the most energy-efficient cooking appliances available. They convert around 85–90 percent of electricity into usable heat, compared to:
- Gas hobs: approx. 40 percent efficiency
- Ceramic electric hobs: approx. 65 percent efficiency
This efficiency translates into faster cooking times and lower overall energy waste, especially when paired with smart meters or time-of-use tariffs.
Common Myths About Induction Cooking
“Induction hobs are expensive to run”
While they draw high power momentarily, shorter cooking times often balance energy usage.
“They are unsafe”
Induction hobs are safer than gas. There are no open flames, and the surface cools quickly once cookware is removed.
“All pans work on induction”
Only ferromagnetic cookware works. Aluminium or copper pans need a magnetic base.
Impact on the UK’s Electrification Goals
As the UK moves away from gas appliances, induction hobs align perfectly with all-electric home strategies, especially in properties using heat pumps and solar panels.
They also reduce indoor air pollution, a growing concern linked to gas cooking.
Installation and Compliance
UK law requires that induction hobs be installed by a qualified electrician. Incorrect installation can lead to overheating, nuisance tripping, or long-term cable damage.
With proper installation, induction hobs offer long service life, high efficiency, and safer kitchens.
