What Size Cable Do You Need for an Induction Hob?

For an induction hob rated 7-7.4kW (32A at 230V), use 6mm² cable on a dedicated 32A radial circuit under BS 7671. Larger hobs rated 9-11kW require 10mm² on a 45A circuit. Under NEC, 8 AWG on a 40A circuit covers most induction cooktops per Table 310.16. Diversity can be applied as not all zones operate simultaneously.

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Quick Reference: Cable Size for Induction Hob / Cooktop by Standard

Standard	Cable Size	Conditions	Reference
BS 7671	6mm²	32A dedicated radial circuit, Method C	Table 4D1A
NEC	8 AWG	40A circuit, NEC 220.55 demand factors	Table 310.16
AS/NZS 3008	6mm²	32A dedicated circuit, AS/NZS 3000	Table 13
IEC 60364	6mm²	32A dedicated circuit	Table B.52.4

Values shown are for copper conductors in typical domestic/commercial conditions. Actual size depends on installation method, ambient temperature, and cable length. Use our free cable sizing calculator for your exact scenario.

Typical Applications for a Induction Hob / Cooktop

Induction cooktop
Induction hob unit
Combined induction and oven
Commercial induction range

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These are general guidelines. Your specific installation needs exact calculation accounting for cable route length, installation method, ambient temperature, and cable grouping.

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Frequently Asked Questions

Is 4mm² enough for an induction hob?▼

For small 4-zone hobs rated under 5kW (22A), 4mm² on a 32A circuit may suffice. However, most modern induction hobs are rated 7-7.4kW (32A), making 6mm² the standard recommendation under BS 7671.

Can an induction hob share a circuit with an oven?▼

No. An induction hob should have its own dedicated radial circuit. If you have a separate built-in oven, it requires its own circuit as well. A combination cooker unit may share one circuit if the total demand allows.

What is the actual power draw of an induction hob?▼

While rated at 7-11kW total, induction hobs rarely draw full power simultaneously. Diversity means typical simultaneous load is 60-70% of the rated maximum. BS 7671 Appendix A allows diversity for cooking appliances.

Does an induction hob need special wiring?▼

No special cable type is needed, but induction hobs require a dedicated high-current circuit (32A or 45A) with appropriate cable sizing. The rapid power cycling of induction elements means cable must handle intermittent full-load current.

What connection type does an induction hob use?▼

Induction hobs are hardwired via a terminal block — there is no plug. The connection is made at a cooker outlet plate or junction box near the hob location. A qualified electrician should make the final connection.

Related Cable Sizing Guides

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What Size Cable Do You Need for an Electric Oven?6mm² (BS 7671)

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What Size Cable Do You Need for a 45 Amp Circuit?10mm² (BS 7671)

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What Size Cable Do You Need for a 32 Amp Circuit?4mm² (radial) or 2.5mm² (ring) (BS 7671)

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What Size Cable Do You Need for an Electric Shower?6mm² (8.5kW) or 10mm² (10.5kW) (BS 7671)

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