I am sizing a fused main disconnect for several motors. Total sum of the FLA of all motors is 441 Amps including a 100hp motor. The 100hp is the largest motor (all run continuously). My question is sizing the service. My understanding is I add 25% of the largest motor FLA to the sum of the motor FLA's. See 430-24. Any help would be appreciated.
Which of the following formula's are correct:
(Sum of all motors FLA + (0.25 * largest motor FLA)) = Minimum size of service OR (Sum of all motors FLA + (1.25 * largest motor FLA))
Which of the following formula's are correct:
(Sum of all motors FLA + (0.25 * largest motor FLA)) = Minimum size of service OR (Sum of all motors FLA + (1.25 * largest motor FLA))