4mm cable is a versatile workhorse in the electrical world. At 240V, it comfortably handles loads up to in most domestic scenarios, making it ideal for cookers, garage supplies, and heavy appliances.
The cable’s amp rating is not the circuit’s protective device rating. A 32A MCB/RCBO is fine for 4mm² in most methods. A 40A breaker is not allowed unless 4mm² XLPE and clipped direct — and even then, many inspectors reject it. 4mm cable amp rating 240v
If your appliance pulls more than 30 Amps, ensure your installation method allows for heat dissipation. 4mm cable is a versatile workhorse in the electrical world
However, electrical safety is precise. Always measure your cable run to check for voltage drop, and ensure your breaker matches your installation method. If in doubt, always consult a Part P registered electrician. A 32A MCB/RCBO is fine for 4mm² in most methods