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For MTI customer, it is not allowed to use any MTI product in any hazardous location, especially prohibit from using in Class I environments (flammable gases & vapor)

 Typical customer applications that are in Class I environments
(flammable gases & vapors) include:
Typical customer applications that are in Class II environments (combustible dust) include:

–Spray painting and finishing areas
– Utility gas plants
– Petroleum refining plants
– Petroleum dispensing locations
– Dry cleaning facilities
– Dip tanks containing combustible or flammable fluids
– Plant facilities extracting solvents
– Inhalation anesthetic areas
– Process facilities manufacturing or using nitro-cellulose
(class II as well).
– Aircraft hangars and fuel servicing areas.
– Gas stations

– Flour mills
– Feed mills
– Grain elevators and grain handling facilities
– Firework plants and storage areas
– Aluminum manufacturing and storage areas
– Magnesium manufacturing and storage areas.
– Magnesium manufacturing and storage areas.
– Coal preparation and handling facilities
– Starch manufacturing and storage areas
– Confectionary plants – Pulverized sugar and cocoa manufacturing plants. Packaging and storage plants.
– Spice grinding and storage plants
– Spice grinding and storage plants

But If you are going to put MTI PRODUCT in the hazardous location, you must have the Explosion Protection at your own risk. And it is recommended to pass Underwriters Laboratories (U.L.) and the Canadian Standards Association (CSA) certificate at your cost.

Please learn NFPA70 National Electric Code (NEC) and C22.1 for use in Division based hazardous locations and
 information NEMA explosion proof motors.

                                                                                                                                                    NEMA explosion proof AC and DC motors

Motors misapplied in hazardous environments can cause a fire or explosion resulting in the destruction of property, serious injury or death. Only the end user or a qualified underwriter is to identify and select the proper class, group, division, and temperature code motor to meet the requirements of each installation.

1,  Hazardous area classifications

Division - defines how often the potentially explosive materials are present during normal operating conditions.
Division 1: Ignitable concentrations are present all or most of the time
Division 2: Ignitable concentrations are not likely to be present during normal operation

2. Classes and groups - define the type of potentially explosive atmosphere and the specific materials it contains. 

Hazard Class Groups per NEC 500 Substance
Class I Flammable gases / vapors / liquids Group A Acetylene
Group B Hydrogen
Group C Ethylene
Group D Propane
Class II Combustible dusts Group E Metal Dust
Group F Coal Dust
Group G Grain Dust
Class III Ignitable fibers and flyings

Not divided into Groups.165ºC maximum temperature limit for all Class
equipment not subject to overloading. 120ºC maximum temperature limit for all equipment subject to overloading

3. Surface temperatures

The “T” Code identifies the maximum absolute motor surface temperature that will be developed under all conditions of operation  and is chosen to be below the ignition temperature of the potentially explosive material in the hazardous area. Surface temperatures of explosion proof motors will not exceed the following UL and CSA maximums under fault conditions.

T Code Maximum motor surface temperature T Code
Surface temperature
°C °F °C °F
T1 450 842 T3A 180 356
T2 300 572 T3B 165 329
T2A 280 536 T3C 160 320
T2B 260 500 T4 135 275
T2C 230 446 T4A 120 248
T2D 215 419 T5 100 212
T3 200 392 T6 85 185
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