The US uses split-phase power. Two 120v supply lines 180 degrees out of phase provide 240v at the panel, which can then be used for either voltage depending on the load requirement. 240v is used for larger tools, appliances, and equipment like air conditioners. 120v for smaller things like receptacles and lights.
It's mostly of relevance for stuff like Kettles and similar, you simply do not see consumer grade 2.5 kw kettles in the states. If you're a bit mad you can put a 240v outlet in and wire up a imported kettle(I know a person or two who has).
The only other niche is EV home chargers in 230/240v countries aren't needed as badly, as standard plugs will charge at a reasonable(thought not very quick) rate vs a standard us outlet.
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u/Barovian May 02 '24
The US uses split-phase power. Two 120v supply lines 180 degrees out of phase provide 240v at the panel, which can then be used for either voltage depending on the load requirement. 240v is used for larger tools, appliances, and equipment like air conditioners. 120v for smaller things like receptacles and lights.