I am in India. We have 3 phase power coming in from the grid. They don't do single phase for anything over 3 kVA. 4 wires from the pole to a fuse box. 415V, 3 wires each going to a separate fuse and neutral. All appliances are single phase. They are distributed across all 3 phases. All sockets have a ground, neutral and live. Is this a 3 phase wye? That would mean 240V at each socket which sounds correct.

Now if you were to get a generator would you do a single phase or 3 phase generator? 3 phase is slightly cheaper. How would the single phase generator be connected in this scenario?