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For Cable design we use these two formulas::
For Single-phase
VD =2 x K x I x D/CM
For Three-phase
VD =1.732 x K x I x D/CM
VD ===> voltage drop, from code:3% -5%
K =12 for copper21 for Aluminum
D = Length in feet
CM = Circular mil
I = Load current
I dont think the given parameters are sufficient for the selection of cable for a3p motor. the length between the motor and power supply is to be known to calculate the voltage drop on the cable..as distance increase, voltage drop also increases. Standards can be what that is followed according to the country in which you do the work, most preferred IEC. but im not sure
The Power Supply :50Hz 415V 3P+N
Abhilash Eapen Joseph IS CORRECT.
IF U HAV THE CURRENT RATING OF THE MOTOR AND VOLTAGE DROP BETWEEN THE SUPPLY AND THE POINT OF UTILIZATION,D REST IS EASY.