Hazardous Location Classifications UL 844 Electric lighting fixtures for use in hazardous (classified) locations Class 1, Division 2 (Groups A, B, C, D) Class 1 (Hazardous Material in Surrounding Atmosphere): Flammable vapors or gases may be present Division 2 (Presence...
| Hazardous Location Classifications | |
| UL 844 | Electric lighting fixtures for use in hazardous (classified) locations |
| Class 1, Division 2 (Groups A, B, C, D) | Class 1 (Hazardous Material in Surrounding Atmosphere): |
| Flammable vapors or gases may be present | |
| Division 2 (Presence of Hazardous Materials): | |
| Ignitable concentrations of hazards exist only under accidental system breakdowns or abnormal operating conditions | |
| Groups A, B, C, D (Hazardous Material in Surrounding Atmosphere): | |
| A = Acetylene | |
| B = Hydrogen, butadiene, ethylene oxide, propylene oxide and acrolein | |
| C = Ethylene, cyclopropane and ethyl ether | |
| D = Acet
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