Given: A 10 horsepower, 230 volt, 3 phase squirrel cage motor is fed by the largest allowable inverse time circuit breaker and the smallest allowable type TW branch circuit conductor in flexible metal conduit. What is the minimum size copper equipment grounding conductor that can be used ?

Given: A 10 horsepower, 230 volt, 3 phase squirrel cage motor is fed by the largest allowable inverse time circuit breaker and the smallest allowable type TW branch circuit conductor in flexible metal conduit. What is the minimum size copper equipment grounding conductor that can be used ?