Open Drip Proof Motor

National Motors’ NM Series consists of motors designed for fire pump applications as specified in NFPA 20. These three-phase horizontal low-voltage squirrel-cage medium induction motors are constructed and manufactured as per the requirements of NEMA MG 1 standard Design B.

With Open Drip Proof enclosures, they provide the best possible ventilation suitable for environments having minimal airborne contaminants and better cooling that contribute to the most efficient performance available from these motors.


SERIES: NM, ODP ENCLOSURE 2 POLE

Rated Output 15 HP - 500 HP
Rated Voltage

380-400-415v (50Hz), 208-230v* (60Hz),

380-400v (60 Hz), 440-460v (60Hz) & 575 (60Hz)

Rated Speed
 2861 - 2985 RPM (50Hz) & 3429 - 3585 RPM (60Hz)

*Motors rated at this voltage are available only for power ratings from 15 to 100 Hp.

4 POLE

Rated Output
 15 HP - 400* HP
 Rated Voltage

80 - 415V (50Hz), 208 - 230v** (60Hz),

380-400v (60Hz), 460v (60Hz) & 575v (60 Hz)

Rated Speed
 1440 - 1485 RPM (50Hz) & 1728 - 1785 RPM(60Hz)

* Up to 450 Hp for 60 Hz

** Motors rated at this voltage are available only for power ratings from 15 to 100 Hp.

  • Frequency: 50 & 60 Hz
  • 1.15 Service Factor
  • 50°C Ambient Temperature rating
  • High Quality Ball Bearing
  • UL File No. EX26863
  • Stainless Steel name plate
  • RAL 3000 Standard red painted
  • IP23 Degree of Protection
  • Altitude rating of 1000 meters above sea level
  • F1 foot mounting
  • Suitable for various standard starters such as across the line, wye-delta, soft starter etc.

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