the author of this app says:
MotorData CE is a utility designed for electrical engineers, electricians and safety inspectors. It calculates the full load current, maximum recommended fuses, starter-NEMA size, wire size, conduit size and other data. It includes information related to electric motors and their feeders, based on the National Electrical Code (NEC99).
Simply select the motor type, size, voltage, speed and Code Letter. The program returns with the calculated information you need.