AFAIK (and i could be totally wrong here; 3 phase is where my knowledge of electricity takes a sharp dip!) you can get up to 480V total on a 3 phase circuit in the US… 3 phase is what a lot of dedicated car charging circuits would run off

i had heard that US properties get 3 phase power by default and a lot of your circuits are split between the phases, where a lot of 230/240V countries get a single phase, and that you have certain 240V circuits for speciality things like clothes driers that operate somehow using multiple phases at once? or that could be total nonsense misremembering

… but also, houses in 240V countries (i’m in australia for example and we have 240) can also get 3 phase, and that’s often what’s added for electric vehicles