Fire Pump Motor Connection

Wiring from the fire pump controller to the fire pump motor not installed through a building as covered in 695 6 b must be in rigid metal conduit intermediate metal conduit electrical metallic tubing liquidtight flexible metal conduit liquidtight flexible nonmetallic conduit type b listed type mc cable with an impervious covering or.

Fire pump motor connection.

Terminals are rated 75ºc. In this lesson we ll learn to read and interpret motor connection diagrams and determine the electrical relationship of the stator windings using motor conne. Here s a 3 phase example. A 25 hp 208v 3 phase fire pump motor is 175 ft from the service.

When designing or installing electrical power supplies for fire pumps and their accessories you must apply special rules as listed in nfpa 70 the national electrical code nec and the standard for centrifugal fire pumps cfp nfpa 20. The overcurrent devices may be set as normally required by the code nec table 450 3 a and table 450 3 b and must be set for indefinite time for lrc of all of the fire pump motors lrc of the jockey pump fla of the associated fire pump accessory equipment and 100 of the remaining loads. Designing electrical systems for fire pumps since fire pumps are considered life safety equipment they must be reliable. Always use wiring diagram supplied on motor nameplate.