A balanced, 4 wire, 3 phase, 120/208 volt system supplies a 25 KW resistive load. Each of the underground conductors must have an ampacity of at least _____ amps.

A balanced, 4 wire, 3 phase, 120/208 volt system supplies a 25 KW resistive load. Each of the underground conductors must have an ampacity of at least _____ amps.