fire pump disconnect

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wyboy

Senior Member
Two questions on fire pump disconnects: 695.4 allows disconnects AND associated over current protection to be installed between the fire pump source and fire pump controller.

1st question: Is overcurrent protection required (sized at locked rotor amps) or may it be a simple service rated switch without overcurrent protection.

2th question: If the disconnect is allowed without overcurrent protection, and is located away from the fire pump controller, is it allowed to bond the grounded conductor from the utility with a main binding jumper at the disconnect or does the grounded conductor from the utility need to go all the way to the fire pump controller.
 
My opinion would be that due to the requirements of 230.91, any disconnect without OCP would not be considered the prime service disconnect.
250.142 would allow the grounded conductor to bond such a switch.
 
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