Why would you need 3 phase for induction cooktop? You just need 220v for that, which is L+L (split phase) for U.S and N+L for the majority of the world, probably for the car charger?

So most homes around the globe will have two wires, N and L, where the voltage between the two is 220v to 240v.

When we talk 3 phase there are two different setups

1- Three-Wire

Just 3 L wires no N, the voltage between each two phases is 380-400v ( not sure what that is in the U.S) but google tells me it is 460v which won't work on the hydro miners if the number is correct, such setup only exists in industrial areas.

2- Four-wire Wye

3 L + 1N , the voltage between L and L is 380-400v , between L and N is 220-240v, these 4 wires will run along the street and then house one gets L1+N , house two gets L2+N and so on, so despite having 4 wires running under or above your house, you get only 2 since as a normal house all you need is that, when it is a business or a factory they give them the 4 wires because while most of their machines would require only L1+L2+L3 , they would still the N to get 220v for the lights, TV and what not.


So in the average country, residential buildings won't get 3 phase wiring, electric car chargers might change that concept, might have already changed that in some places.

Back to weird U.S numbers, Phill's numbers match the result I got from Google, 460v is probably too much for the hydro miner given that the specs clearly state 380v-415v, I am sure you can find transformers in the U.S that can get you 400v instead of 460v, just not sure how popular those are.