Fire pump fed from two sources

[gwood]

I have a fire pump controller with integrated transfer switch. Do I need to size OCP for the generator feed to locked rotor,also does the normal power feed need to be sized for locked rotor

 

[RUWired]

I have a fire pump controller with integrated transfer switch. Do I need to size OCP for the generator feed to locked rotor,also does the normal power feed need to be sized for locked rotor

gwood, the OCP on the generator needs to be sized for normal starting and running currents of the motor plus any other loads on the gen set that it might have per article 695.3(B)1.

The service and feeder conductors are sized at 125% of motor(s) loads per 695.(C)1 or 2.

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