I have an installation where the utility is providing a dedicated 480V service for a fire pump the fuse is required to be 1000A (6xFLA) and my conductors are required to be 125% but does the fact that this is now a service entrance conductor effect the size of the incoming feeders?
Fire Pump Service / Entrance
- Thread starter Mike01
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charlie
Senior Member
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- Indianapolis
No. It may help to conceptualize fire pump installations in this manner. Size everything the same as you would for a motor installation. Then, up-size the overcurrent protection only to permit locked rotor to be held for an indefinite period. This is a general statement but the concept is sound. Also, if the controller is SUSE rated, you are not required to provide overcurrent protection since it is integral with the controller.
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