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Hazardous Location Emergency Lights, Exit Signs & Exit Sign Combos

Shop Hazardous Location Emergency Lights, Hazardous Location Exit Signs, and Hazardous Location Exit Sign Combos for classified (hazardous) areas. These are also known as explosion‑proof emergency lighting and signage. Use in areas classified as Class I/II/III, Division/Zone per NEC; select models listed to UL 844 (haz‑loc) and UL 924 (emergency egress).

UL 844 Haz-Loc UL 924 • 90-Min Egress Class I/II/III • Div/Zone Explosion-Proof Self-Testing 120/277 VAC

Hazardous‑Location Buying Tips
  • Start with classification: Confirm Class / Division (or Zone) / Group and match the fixture’s haz‑loc listing and temperature code.
  • UL listings: Haz‑loc luminaires/signs should carry UL 844 for the classification and UL 924 for emergency performance (illumination/transfer/90‑min).
  • Enclosure integrity: Explosion‑proof housings use flame‑path joints and threaded/sealed entries. NEMA/IP ratings improve durability but do not replace haz‑loc certification.
  • Egress illumination: Aim lamp heads/optics to maintain about 1 fc average and 0.1 fc minimum for the full 90 minutes.
  • Power & battery: Universal 120/277 VAC; select Ni‑Cd or lithium packs sized for accessories and ambient while preserving runtime.
  • Exit legend specs: 6" LED letters (red/green), single/double‑face with field chevrons; confirm viewing distance for your sightlines.
  • Wiring methods: Use approved conduit, sealing fittings, and gasketed entries per NEC to protect flame paths and prevent gas/dust migration.

Summary: For classified spaces, specify explosion‑proof hazardous location emergency lights, exit signs, and exit sign combos listed to UL 844 and UL 924; match the exact Class/Division (or Zone/Group). Treat NEMA/IP ratings as supplemental environmental protection.

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Hazardous Location (Explosion‑Proof) Lights, Exit Signs & Combos — UL 844 & UL 924 • Class/Division • 90‑Minute — Features & Specs

  • Certifications: Carry UL 844 for the classified environment and UL 924 for emergency egress performance (illumination, transfer, 90‑min).
  • Classification match: Specify by Class I/II/III, Division/Zone, and Group; verify temperature code and ambient rating.
  • Explosion‑proof construction: Flame‑path joints, threaded covers, and sealed entries contain any internal ignition and prevent external ignition.
  • Ingress & corrosion protection: Weather/wash‑down resistance (e.g., NEMA 4/4X, IP65/66) is common for durability; use in addition to the haz‑loc listing.
  • Egress photometrics: Design for about 1 fc average / 0.1 fc minimum at the 90‑minute mark; aim adjustable heads to cover stairs, doors, and turns.
  • Exit legend visibility: 6" LED letters (red/green), single/double‑face with field chevrons; select viewing distance for long industrial sightlines.
  • Power & electronics: Universal 120/277 VAC, brownout/surge protection; optional self‑testing for automated monthly/annual checks.
  • Battery systems: Ni‑Cd or lithium packs sized for load and ambient; cold‑weather kits as needed; maintain ≥90 minutes for sign + heads on combo units.
  • Wiring methods: Use approved conduit and sealing fittings per NEC to maintain enclosure integrity and contain gases/vapors/dusts.

FAQs About Hazardous Location Emergency Lights, Exit Signs & Combos

What’s the difference between “hazardous‑location listed” and “explosion‑proof”?

“Hazardous‑location listed” means the equipment is certified (e.g., UL 844) for a specific Class/Division/Zone and Group where flammable gases, vapors, dusts, or fibers may be present. “Explosion‑proof” describes an enclosure designed to contain an internal ignition and cool escaping gases so they don’t ignite the surrounding atmosphere. Most haz‑loc emergency lights, exit signs, and combos use explosion‑proof construction to satisfy the listing.

Do these products need both UL 844 and UL 924?

Yes—UL 844 covers suitability for the classified environment (Class/Division/Group). UL 924 covers the egress role—illumination levels, transfer behavior, indicators, and the required 90‑minute operation.

Are NEMA/IP ratings the same as hazardous‑location ratings?

No. NEMA/IP indicate water/dust/corrosion protection and mechanical durability. They are often present on haz‑loc gear (e.g., NEMA 4X, IP66), but they do not replace hazardous‑location certification. Always match the Class/Division/Zone and Group first; use NEMA/IP as additional environmental protection.

How do I size light output for large industrial areas?

Plan for roughly 1 fc average and 0.1 fc minimum at the end of the 90‑minute discharge. Select optic packages, mounting height, and head aiming to maintain these levels along the egress path (stairs, doors, intersections).

What wiring/sealing steps are critical in classified spaces?

Follow NEC hazardous‑location methods: use approved conduit, sealing fittings, and gasketed entries. Proper seals protect flame paths and prevent gas or dust migration into enclosures and raceways.

When should I choose a combo unit instead of separate sign + lights?

Use a Hazardous Location Exit Sign Combo when you need both an EXIT legend and emergency illumination at the same point (e.g., at an exit door in a classified area) and want to minimize devices, penetrations, and maintenance. Ensure the combo’s battery budget supports both the sign and lamp heads for the full 90 minutes.

Hazardous Location Glossary (Quick Reference)

Hazardous Location Emergency Lights — Battery‑backed luminaires listed to UL 844 (haz‑loc) and UL 924 (egress) that provide 90‑minute illumination in classified areas. Typical use: egress paths in process rooms, paint booths, tank farms.
Hazardous Location Exit Signs — “EXIT” fixtures for classified spaces, with 6" LED letters (red/green) and 90‑minute backup per UL 924; the enclosure is explosion‑proof and listed to the area classification per UL 844.
Hazardous Location Exit Sign Combos — A single enclosure combining an exit sign and emergency lamp heads; listed to UL 844 and UL 924. Ideal at exit doors/intersections in classified zones to minimize devices and penetrations.
Class / Division / Zone — NEC/IEC schemes describing the type of hazard (Class I gases/vapors, Class II dusts, Class III fibers) and likelihood of presence (Division 1/2 or Zones 0/1/2). Always match the product’s rating to the location.
NEMA / IP Ratings — Environmental protection grades (water, dust, corrosion). Useful for wash‑down/weather exposure but do not indicate suitability for explosive atmospheres; haz‑loc certification is separate.