Use a DPST - A two pole switch.
If you mean 110/240, yes, but there may be a hidden switch to switch it to 240 volt mode. Check the manual.
No, unless the motor was wound for dual voltage operation, which it will state on the motor nameplate, a 110 volt motor run on 240 volts will be damaged.
No, the receptacle's rating is 240 volt and that is the maximum voltage allow to be applied to that device. To prevent this condition from happening 277 volt receptacles and switches have a larger box that they fit into. The retaining screws are set apart further that a 240 volt device which makes it impossible to install a 240 volt device in a 277 volt junction box.
No, the voltage rating of the switch is too low.
If you mean a dual voltage motor 120/240 then yes these will operate on a 240 volt home distribution system.
It could if you don't get the terminals and motor wires on the correct terminals.
2304w
You need to find the wattage of the pump motor. This is found by multiplying the voltage of the motor by the amperage of the motor. Once you have this figure use it to find an inverter that can handle this wattage load at a 240 volt output.
Unless the switch has a pilot light on it there is need for a neutral connection to the switch.
Yes, if the motor is rated 240 volts 3 phase.There is such a thing as 240 volt 3 phase power.However if you are asking if you can use 240 volts single phase on a three phase motor, then the answer is no.
No, but if you ever switch to an electric stove you will have problems getting a 240 volt circuit to that location. I would go ahead and install a 240 volt outlet at that location if this is new construction. Costs very little and you will be all set for the future.
No. Not safe to do so. The distances between contacts may not be sufficient.