Hazardous Location Motors

Hazardous location

Locations where the atmosphere either does or could contain dust, gas or vapor in quantities large enough to be explosive are classified as hazardous locations. Nidec Corporation manufactures sturdy, efficient hazardous location motors under our LEROY-SOMER™ and U.S. MOTORS® brands. Motors for equipment in such locations must be designed to stand up to harsh conditions and contain sparks, flashing and explosions as much as possible. Our hazardous location motors are manufactured to contain explosions inside the motor casing component, helping prevent outside ignition.



Our LEROY-SOMER brand began in 1919 when Marcellin Leroy founded a motor-manufacturing company in France. This brand now boasts nearly 10,000 employees worldwide and sells its motors and drives on a global scale. LEROY-SOMER produces several motors designed for corrosive, harsh environments. Our hazardous location motors stand up to high temperatures and extreme conditions while maintaining the efficiency and quality long associated with this brand’s name. Several of these rugged motors are non-sparking; and others provide flameproof, cast-iron frames that can keep your hazardous location applications running even under the toughest of conditions.



We’ve been crafting top-quality products under the U.S. MOTORS® brand since 1908. Our hazardous location motors are designed in compliance with industry regulations. We understand just how important the health and safety of your workers is, and you can depend on our motors. Not only do they conform to energy and safety requirements, but they’re also cost-effective and long-lasting. We can also customize motors to your specifications if you require something unique. Our engineering teams are experienced and innovative – something you can see in the hazardous location motors we develop.

The National Electrical Code (NEC®†) divides hazardous locations into certain classes and groups depending on the specific explosive agent that could be present. To view the entire list, consult the NFPA (National Fire Protection Association) publication 487M. Underwriters’ Laboratories (UL®†), which tests motors and other devices for use in such explosive atmospheres, publishes its list of motors that conform to its standards in each class and group. Keep in mind, however, that utilizing a UL®†-listed device does not automatically result in complete compliance with the NEC®† or local codes. Please see Chapter 5 of the NEC®† local building codes, OSHA requirements and insurance inspectors to see complete information for the appropriate hazardous location motor procedures to follow.