Fire Pump Motor Nema Code

Three phase open dripproof odp energy efficient motors ul.

Fire pump motor nema code.

Nema premium csa ce iso9001 certified. Three phase modifiable nema horizontal motors catalog pb202. Fire pump motors overview 512kb. Since fire pumps are considered life safety equipment they must be reliable.

Branch circuit conductors to a single fire pump motor must have a rating of not less than 125 of the motor flc as listed in tables 430 248 or 430 250. Designing electrical systems for fire pumps. Usage service guidelines. Nema close coupled pump motors are specifically designed for use on industrial and commercial pumping units.

Titan horizontal motors catalog pb210. The nameplates of alternating current ac motors built to national electrical manufacturers association nema standards reference a system of alphabetical letters that designate the principal characteristics of each motor code design and insulation class. The starting kva required by a motor starting at full voltage is determined from the nameplate on the motor or from the manufacturer. Motor type code search.

The overload protection provided in the fire pump controller is the only overload protection permitted in the normal supply to the fire pump and is the only device permitted to open the motor circuit under locked rotor conditions 10 4 4 so the circuit s ocpd provides protection only for short circuit or ground faults. An odp enclosure can protect the motor s interior from water falling on top of the motor but not from water coming from the sides. A a fire pump motor should be in accordance with nfpa 20 9 5 1 1 which states that it must comply with nema design b standards and be listed for fire pump service. Though critical to proper motor selection these designations are easy to misinterpret.

Standard 3 phase motors often have these locked rotor codes. In general it is accepted that small motors requires higher starting kva than larger motors. 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.