I have a new induction cooktop Bosch PIF645BB1E rated at 7.4 kW. According to its documentation it should be connected with 5 wires (2 phases, 2 neutrals and 1 PE wire). From a former flat renter I have a power outlet with 5 dedicated 2.5 mm2 wires (3 phases, 1 neutral wire and 1 PE wire). I think that I can connect 2 phases to 2 phases, PE wire to PE wire and 2 neutrals to just 1 neutral wire, but I am not sure that just one 2.5 mm2 neutral wire is enough in this case. Is it OK to connect it like this or I need thicker wires for this cooktop?
Thank you for your answers!