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Class I Division 1, Class I Division 2, Zone 1, Zone 2 — spec the wrong enclosure and you fail inspection (or worse). Here’s exactly what to specify for oil & gas, chemical, refinery, and any hazardous environment.
The North American (NEC / CEC) hazardous location system in one table.
| Class | Division 1 (present continuously) | Division 2 (present only under abnormal conditions) |
|---|---|---|
| Class I — Gases / vapors | Refineries, gasoline dispensing, spray booths | Storage areas next to Div 1 zones, closed containers |
| Class II — Dusts | Grain elevators, coal handling, powder mills | Storage adjacent to Div 1 dust areas |
| Class III — Fibers / flyings | Textile mills, sawmills, cotton gins | Storage of easily-ignitable fibers |
Groups (A, B, C, D for Class I; E, F, G for Class II) further refine the substance being protected against. Ask us if unsure.
Wellhead pumps, pumping units, tank battery equipment.
Process pumps, cooling water, blowers, agitators — almost every rotating asset.
Reactor mixers, transfer pumps, ventilation blowers in flammable atmospheres.
Bucket elevators, augers — Class II Div 1/2 dust hazard.
Automotive, industrial coating — exhaust fans, conveyor motors.
Methane atmosphere — mixers, pumps, blowers all require XP rating.
Send us the area classification + spec — we’ll quote a certified motor within one business day.
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