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This is a specialized area of the electrical code different than normal domestic circuitry. Large motors (3HP and greater) often need supply panel circuit breakers about double the name plate amperage rating. But then they also need properly rated time delay fuses or "heater" type motor starters (contactors). Often a circuit for multiple motors or machines will be rated for the expected total draw of the motors with the exception of simultaneous start up load (not expected) and then have individual motor starter switches rated for each motor. Research it before wiring your shop. Also remember that high voltage circuits use less amperage per HP and thus smaller wire size.