Fun fact: In some large apartment buildings in America, kitchen stoves cook 14% percent slower than single family homes.

These buildings use 208 volt wye, which provide on each leg 120 volts to ground. Which is economical for wiring purposes but leaves 240 volt electric stoves with only 208 volts or 14% less heating ability. Not a big deal but slower boiling of a pot of water or more time bringing the oven up to temperature.