Ben Trueblood
Member
I have a 200 Amp breaker feeding a 200 Amp fused disconnect for an elevator.
the elevator is a 25 HP 208 V 3 Phase. According to the motor table the FLA for sizing conductors and overcurrent protection is approx. 75 Amps before adding the 125%.
According to my understanding if I use time delay fuses at a starting % of 175% of the FLA I would need way less than 200 A more like 150A fuses.
Originally the elevator was going to be sized larger and that is why the 200Amp breaker was originally considered.
My question is what size conductors am I required to run from my panelboard to the disconnect if i leave the 200Amp breaker in? Do I have to run 200Amp rated wire even though I am only feeding a motor?
Thanks
the elevator is a 25 HP 208 V 3 Phase. According to the motor table the FLA for sizing conductors and overcurrent protection is approx. 75 Amps before adding the 125%.
According to my understanding if I use time delay fuses at a starting % of 175% of the FLA I would need way less than 200 A more like 150A fuses.
Originally the elevator was going to be sized larger and that is why the 200Amp breaker was originally considered.
My question is what size conductors am I required to run from my panelboard to the disconnect if i leave the 200Amp breaker in? Do I have to run 200Amp rated wire even though I am only feeding a motor?
Thanks