UL 844 Certified Lighting

What UL 844 Certification Means

UL 844 is the standard specifically covering electric lighting fixtures for hazardous (classified) locations under the North American Class/Division system, addressing Class I (gas), Class II (dust), and Class III (fibers) hazards. It's the specific standard that governs Explosion Proof Lighting and other hazardous-location-rated luminaires, distinct from the general luminaire safety standard, UL 1598.

UL 844 certification verifies a fixture's construction — including flame paths, enclosure integrity, and component ratings — meets the requirements for its specific classification (class, division, group, and temperature code), ensuring it won't become an ignition source in the hazardous atmosphere it's rated for.

UL 844 vs. UL 1598

These standards apply to different use cases:

• UL 844 covers fixtures specifically intended for hazardous (classified) locations.
• UL 1598 covers general-purpose luminaires not intended for classified hazardous environments.

A fixture intended for a hazardous location needs UL 844 certification specifically — general UL 1598 listing alone doesn't qualify a fixture for installation in a classified area.

Where UL 844 Applies

• Oil & gas and LNG facilities — Class I hazardous locations
• Grain and agricultural processing — Class II dust hazard locations
• Textile and fiber processing facilities — Class III fiber and flyings hazard locations
• Any facility with a classified hazardous location — per NEC Class/Division requirements

Confirming the Right Certification

For any installation in a classified hazardous location, confirm the fixture carries UL 844 certification specifically matched to the site's class, division, group, and temperature code — not just general UL listing. A facility hazard assessment determines these specifics for each area of a site.