SolutionProblem13_11

SolutionProblem13_11 - Solution Problem 13-11: Given: 100...

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Solution Problem 13-11: Given: 100 hp, 460 V, 60 hz, 120 A motor a. Find the required wire size. The NEC only allows us to use 80% of the stated ampacity in table 310.16; therefore, the motor current must be increased to 125% (the inverse of 0.8). Further, the motor current must be obtained from table 430.150. From that table, the motor current full load amps (FLA) is 124 A. Required ampacity = 1.25 * 124 A = 155 A From table 310.16, using copper wire, we will need a 3/0 if 60 insulation is used, a 2/0 if 75 oo
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