A single-phase supply will have one fuse, while a three-phase electricity supply will have three 100-amp fuses. Here is an overview of the typical domestic installations: Three-pin plug : 2.3kW (slow) ...

For example, if you you need to plug your car in to a standard single-phase wall socket, there are 230 volts running through a 10-amp circuit generating a maximum of 2300 watts (2.3kW).