What Size Cable Do You Need for an Electric Oven?
For a standard electric oven (2-3kW), 2.5mm² on a 20A circuit is sufficient. For a full electric cooker (8-12kW), use 6mm² on a 32A circuit. Double ovens or combination cooker-hobs drawing over 12kW need 10mm² on a 45A or 50A circuit.
Quick Reference: Cable Size for Electric Oven / Cooker by Standard
| Standard | Cable Size | Conditions | Reference |
|---|---|---|---|
| BS 7671 | 6mm² | Dedicated 32A or 40A circuit, Method C | Table 4D1A |
| NEC | 8 AWG or 6 AWG | 40A or 50A circuit, NEC 220.55 | Table 310.16 |
| AS/NZS 3008 | 6mm² | Dedicated circuit, AS/NZS 3000 | Table 13 |
| IEC 60364 | 6mm² | 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 Electric Oven / Cooker
- Built-in electric oven
- Freestanding electric cooker
- Double oven
Calculate Your Exact Cable Size
These are general guidelines. Your specific installation needs exact calculation accounting for cable route length, installation method, ambient temperature, and cable grouping.
Frequently Asked Questions
Can I use 2.5mm² for an electric oven?▼
For a single built-in oven (2-3kW, 10-13A), yes — 2.5mm² on a 20A circuit is adequate. But for a freestanding cooker with hob and oven (8-12kW), you need 6mm² on a 32A circuit.
What size cable for a double oven?▼
A double oven typically draws 5-7kW (22-30A). Use 6mm² on a 32A circuit. If the combined rating exceeds 30A, use 10mm² on a 40A or 45A circuit.
Does an electric oven need its own circuit?▼
Yes. Electric ovens and cookers should have a dedicated radial circuit from the consumer unit. This ensures the circuit is not overloaded by other appliances.
What is a cooker control unit?▼
A cooker control unit (CCU) is a switched fused connection unit with a 13A socket, installed adjacent to the cooker. It provides isolation and a convenient socket for small appliances like kettles.
Can I connect a cooker to a ring main?▼
No. Cookers must have a dedicated radial circuit. A ring final circuit (32A, 2.5mm²) is designed for socket outlets, not fixed appliances drawing high current.
Related Cable Sizing Guides
🔌
What Size Cable Do You Need for a 32 Amp Circuit?4mm² (radial) or 2.5mm² (ring) (BS 7671)
🔌What Size Cable Do You Need for a 40 Amp Circuit?6mm² (BS 7671)
🔌What Size Cable Do You Need for an Electric Shower?6mm² (8.5kW) or 10mm² (10.5kW) (BS 7671)
🔌What Size Cable Do You Need for an Immersion Heater?2.5mm² (BS 7671)
Need a different calculation?
Browse all 27 free calculators →