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IEC 60079 Zone Classification
IEC 60079 Zone Classification
IEC 60079 guidelines for classifying hazardous areas
RIG-A-LITE hazardous location lighting is classified according to National Electrical Code (NEC) standards. For international projects, these classifications align with IEC (International Electrotechnical Commission) Zones, ensuring compatibility and safety.
Zone 0
An area where an explosive gas-air mixture is continuously present or present for long periods. Comparable to Class I, Division 1 areas (NEC). Most industrial users avoid electrical equipment in Zone 0, except for intrinsically safe equipment.
Zone 1
An area where an explosive gas-air mixture is likely to occur in normal operations. Comparable to Class I, Division 1 applications.
Zone 2
An area where an explosive gas-air mixture is not likely to occur, and if it does, it is only for a short period. Comparable to Class I, Division 2 locations (NEC).
Zone 20
An area where an explosive dust atmosphere is continuously present. Comparable to Class II, Division 1 and Class III, Division 1 locations (NEC).
Zone 21
An area where an explosive dust atmosphere is likely to occur occasionally during normal operations. Comparable to Class II, Division 2 and Class III, Division 1 locations (NEC).
Zone 22
An area where an explosive dust atmosphere is not likely to occur in normal operations, and if it does, it is only for short periods. Comparable to Class III, Division 2 locations (NEC).
Classification Comparison
| Hazardous Material | NEC U.S. Standards | IEC Standards |
|---|---|---|
| Gas or Vapor | Class 1 Division 1 | Zones 0, 1 |
| Class 1 Division 2 | Zone 2 | |
| Dust | Class 2 Division 1 | Zone 20 |
| Class 2 Division 2 | Zones 21, 22 | |
| Fibers or Flyings | Class 3 Division 1 | Zones 20, 21 |
| Class 3 Division 2 | Zones 22 |
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