Wow, that's a lot. I wonder why they allow so much power per outlet?
Here in the US, the main outlets are only 1.8kW (per circuit), but for high-power circuits, like a water heater, stove, HVAC, etc., they get their own special 240V circuits (current depends on the circuit, usually 30A I think, though HVAC is hard-wired and probably gets 50A or 100A depending on the house). Also, the refrigerator and washing machine usually get their own separate circuits which are 120V/20A each. So the regular wall outlets that normal people plug stuff into on a regular basis are lower voltage and current, but for the devices that need more, they have their own special circuits with higher current and/or voltage.