Explosion Proof Motors

General Specifications: Explosion-Proof motors are designed and approved for application in hazardous environments having certain explosive gases or materials present.

Application Notes: These motors must be applied in accordance with the National Electrical Code, Article #500. A partial listing of explosive agents is noted below. Please consult NFPA Publication 497M for a complete listing. Please note application notes for each explosion-proof motor in the motor listings.

Features: 
• Rugged mechanical construction meeting all requirements for safety. 
• UL and CSA listed. 
• Double shielded, pre-lubricated ball bearings are standard. 
• All motors have inherent automatic overload protection and NEMA 1.00 service factor except as noted. 
• Explosion-proof conduit box included at no extra charge. 
• Normally closed thermostats are standard on cast iron motors. 
• Capacitors on single phase designs are mounted inside the motor frame.

EXCEPT AS NOTED IN APPLICATION NOTES, STEEL FRAME EXPLOSION-PROOF MOTORS ARE NOT INVERTER RATED AND MUST NOT BE USED WITH AN INVERTER.

Divisions: 
Division I Areas are environments where a hazard is present continuously or would be subject to fire or explosion if the hazard was present as a result of accident or uncommon occurrence.
Division II Areas are environments where the threat of fire or explosion is not normally present and not likely to result in the event of an abnormal occurrence.

CLASS I: (Gases, Vapors)
Group A: Acetylene
Group B: Butadiene, ethylene oxide, hydrogen, propylene oxide, gases containing more than 30% hydrogen.
Group C: Acetaldehyde, cyclopropane, diethyl ether, ethylene.
Group D: Acetone, acrylonitrile, ammonia, benzene, butane, ethanol, ethylene dichloride, gasoline, hexane, isoprene, methane (natural gas), methanol, naptha, propane, propylene, styrene, toluene, vinyl acetate, vinyl chloride, xylene.

NOTE: No LEESON motors are listed for Class I, Group A or B.

CLASS II: (Combustible Dusts)
Group E: Aluminum, magnesium and other metal dusts with similar characteristics. 
Group F: Carbon black, coke or coal dust.
Group G: Flour, starch or grain dust.