Determining a motor classification

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joseph12341800

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We have a motor for fire supression to numerous buildings coming off of a water tank Im trying to learn how to classify it and figure out the conductor sizing for my personal benefit. Just trying to get an understanding of calculations and I have a good example at work right now. I can give more details on the motor tomorrow when I get to work. I know its a 3 phase 480 volt fla is 225(150) 200 hp I believe.

It says that pumps are intermitent duty in table 430.22(E) but Im not sure whether this is correct in my application. Thanks for any assistance.
 
joseph12341800 said:
We have a motor for fire supression to numerous buildings coming off of a water tank Im trying to learn how to classify it and figure out the conductor sizing for my personal benefit. Just trying to get an understanding of calculations and I have a good example at work right now. I can give more details on the motor tomorrow when I get to work. I know its a 3 phase 480 volt fla is 225(150) 200 hp I believe.

It says that pumps are intermitent duty in table 430.22(E) but Im not sure whether this is correct in my application. Thanks for any assistance.
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If this is an electric-motor-driven fire-suppression-pump application, refer to Article 695. I don't believe 430.22(E) is applicable here. The motor is continuous duty, even though it may (and hopefully will) never run for its designated purpose.
 
Be advised that on 12/19 all the motor ratings will change when the new DOE requirements kick in. The new high efficiency motors will cost more and may be a different dimmension than current motors with the same ratings.
 
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