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Class Number Description
3428-83
FIXTURES AND FITTINGS - For Hazardous Locations-Certified to U.S. Standards

COVERAGE:
Lighting fixtures for illumination purposes, designed specifically to prevent the ignition of gases,
vapours, dusts or flyings in the surrounding atmosphere or dust or flyings on the luminaire. Any
of the various types of light sources are used, such as incandescent (including tungsten-halogen),
fluorescent, high intensity discharge, etc.

REQUIREMENTS:

UL 50E Enclosures for Electrical Equipment, Environmental Considerations
UL 844 Luminaires for Use in Hazardous (Classified) Locations
UL 60079-0 Explosive Atmospheres – Part 0: Equipment – General Requirements
UL 60079-1 Explosive Atmospheres – Part 1: Equipment Protection by Flameproof
Enclosures "d"
UL 60079-7 Explosive Atmospheres – Part 7: Equipment Protection by Increased
Safety "e"
UL 60079-15 Explosive Atmospheres – Part 15: Equipment Protection by Type of
Protection "n"
UL 60079-18 Explosive Atmospheres – Part 18: Equipment Protection by
Encapsulation "m"
UL 60079-31 Explosive Atmospheres – Part 31: Equipment Dust Ignition Protection
by Enclosure "t"
FM 3600 Electrical Equipment for Use in Hazardous (Classified) Locations –
General Requirements
FM 3615 Explosionproof Electrical Equipment, General Requirements
FM 3616 Dust-Ignitionproof Electrical Equipment, General Requirements

MARKING:

  • Submittor's identification;
  • Model designation or equivalent;
  • Electrical rating, where applicable;
  • Maximum lamp-wattage and lamp type caution where legible during lamp replacement, where
    applicable;
  • Temperature code or equivalent, where applicable;
  • Applicable hazardous locations Class, Group and sometimes Division. Equipment not marked
    to indicate a Division, or marked "Division 1" or "Div 1" is certified for both Divisions 1 and 2
    locations. Equipment marked "Division 2" or "Div 2" is certified only for Division 2 locations;
  • Date code;
  • Cautions, warnings and additional markings as may be required by the applicable Standards;
  • CSA Mark and "US".

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