Can anyone tell me what size wire I need for a 3 phase, 240V, 30A AC electric motor?

 

are u talking about windind wires? if connecting wires
i think specifying the current shud be good enough to buy a wire.

 

Right from this site - http://www.allaboutcircuits.com/vol_5/chpt_3/2.html.

 

This is stranded wire.

 

Beenthere: the chart does not indicate the wire voltage.

 

Wire voltage is limited by insulation type and thickness, not by wire size. Regular THHN insulation is good for around 600 Volts

 

as far as voltage wiresize is not figured on wattage it is figured on amps. No matter what voltage you are using the wire size is per amps. your wire size will also figure in for start current and pf of the motor, as well as distance from the panel. No matter how short the distance from the panel use the wire size in your chart. Calculate the wire size if over the distance limit.

 

Rule of thumb is 700 circular mils per Ampere