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Class I Div 2 Exit Signs – LED, 90-Min Backup (UL 844/924, NEMA 4X/IP66)

Shop Class I Division 2 exit signs (C1D2) for hazardous locations where flammable gases or vapors may be present under abnormal conditions. These UL 844 (hazloc) and UL 924 (egress) listed LED fixtures use sealed, explosion-resistant enclosures to maintain compliant EXIT visibility in refineries, fuel depots, wastewater plants, and chemical processing sites. Explore related categories: hazardous location exit signs, Class I Div 2 exit signs, and C1D2 exit sign combos.

UL 844 / UL 924 Class I Div 2 NEMA 4X / IP66 LED Legend 90-Min Backup Tamper-Resistant
Buyers Guide Tips

What to Look for in Class I Div 2 Exit Signs

  • Hazardous listing: UL 844 Class I, Division 2 with the correct gas group (IIA/IIB/IIC).
  • Temperature code: Appropriate T-rating (e.g., T4/T6) for the classified atmosphere.
  • Enclosure rating: NEMA 4X / IP66 sealing for wash-down, dust, and corrosion resistance.
  • Construction: Die-cast aluminum or FRP body, impact-rated lens, corrosion-resistant hardware.
  • Legend visibility: Even LED illumination, high-contrast background, field-selectable chevrons.
  • Power & runtime: Universal 120/277 VAC input and ≥90-minute battery backup (lithium or Ni-Cd).
  • Mounting: Wall/ceiling/pendant/conduit options; verify hub size and accessories.
  • Diagnostics: Self-testing availability for automated monthly/annual checks.
What is Class I Division 2?
C1D2 is a hazardous location classification for areas where flammable gases/vapors are present only under abnormal conditions (e.g., leaks). Fixtures limit arcs, sparks, and surface temperature to avoid ignition while maintaining compliant EXIT visibility.

Enclosures are heavy-duty die-cast aluminum exit signs or fiberglass-reinforced polycarbonate with full gaskets, impact-rated lenses, and corrosion-resistant hardware. The NEMA 4X / IP66 seal guards against dust, water, and wash-down in harsh industrial environments.

Legends are LED illuminated in field-selectable red or green with high contrast and field-selectable chevrons. Most models provide dual 120/277 VAC input and maintenance-free batteries (sealed Ni-Cd or lithium) for at least 90 minutes of emergency illumination. Mounting options typically include wall, ceiling, or pendant/conduit—verify hub size and accessories per submittal. Optional self-testing diagnostics automate monthly/annual checks to simplify inspections.

Need dust protection instead of gas/vapor? Compare Class II Div 2 exit signs. For outdoor exposure without classified hazards, see wet-location exit signs.

Specification tip: Confirm gas group (IIA/IIB/IIC), temperature code (e.g., T4/T6), ambient rating, and exact ingress protection in each product’s submittal before installation.

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Class I Div 2 Exit Signs Spec Guide

Spec Snapshot

  • Compliance & Markings: Dual-listed UL 844 (hazardous location) and UL 924 (egress). Nameplate should state Class I, Division 2, gas Group(s) (A/B/C/D), and T-code (e.g., T4/T6). Confirm on submittal with the AHJ.
  • Enclosure & Ingress: Gasketed NEMA 4X / IP66 housings with corrosion-resistant hardware and impact-rated lenses for wash-down, dust, and outdoor exposure.
  • Housing Materials: Heavy-duty die-cast aluminum or fiberglass-reinforced construction with sealed conduit entries and stainless fasteners suited to hazloc environments.
  • Legend & Readability: Uniform LED legend in red/green with high contrast; field-selectable chevrons. Typical 6" letters rated to ~100 ft viewing distance—verify model rating and local rules.
  • Power & Electronics: Dual-voltage 120/277 VAC; solid-state charger/automatic transfer with low-voltage disconnect, AC lockout, brownout detection, test button & status LED. Self-testing diagnostics available on select models.
  • Battery Backup: Sealed Ni-Cd or lithium packs providing ≥90 minutes per UL 924; check ambient rating, emergency lumen level, and recharge time on the cut sheet.
  • Mounting & Conduit: Wall/ceiling/end or pendant/conduit mounting using sealed NPT hubs (commonly 1/2" or 3/4"). Use hazloc-rated glands/fittings and follow conduit sealing practices per code to maintain enclosure integrity.
  • Temperature & T-Code: Confirm ambient range (e.g., −20 °C to +40 °C, model-dependent) and ensure the fixture’s T-code remains below the process gas auto-ignition temperature.
  • Options & Finish: Cold-weather packages; marine/chemical-resistant coatings; bilingual legends where required by site policy.

FAQs About Class I Division 2 Exit Signs

What does Class I, Division 2 (C1D2) mean?

It designates areas where flammable gases or vapors are present only under abnormal conditions (e.g., leaks). C1D2 exit signs are designed so normal operation won’t ignite the atmosphere.

Are C1D2 exit signs “explosion-proof”?

Not necessarily. Many C1D2 products are nonincendive rather than flameproof “explosion-proof,” which is more typical of Class I, Division 1. Always verify the nameplate and UL listing to confirm construction type.

Which listings and markings should I confirm?

Look for UL 844 (hazardous location) and UL 924 (egress). The nameplate should show Class I, Division 2, gas Group(s) A/B/C/D, and the T-code (e.g., T4/T6).

What is a T-code and why does it matter?

The T-code is the fixture’s maximum external surface temperature. It must be lower than the auto-ignition temperature of your process gas to avoid ignition risk.

Do I need NEMA 4X or IP66?

In wash-down, dusty, or outdoor zones, NEMA 4X/IP66 protects against water/particulates and corrosion. Match the enclosure rating to site conditions and the submittal.

What legend options are typical?

Most C1D2 exit signs offer red or green LED legends with high contrast and field-selectable chevrons. Acceptable color may be jurisdiction-specific—confirm with the AHJ.

How long is emergency runtime?

Per UL 924, compliant units provide at least 90 minutes of emergency operation. Check the cut sheet for emergency lumen output and recharge time.

What mounting and power options are available?

Wall, ceiling, end, and pendant/conduit mounting are common. Most units accept 120/277 VAC input. Use hazloc-rated glands/fittings and sealed NPT hubs per code to maintain enclosure integrity.

Are self-testing diagnostics available?

Many models include self-diagnostic electronics (or magnetic test access) to automate monthly and annual tests and indicate faults via a status LED.

Any installation tips for classified areas?

Verify ambient range and T-code, maintain gasket integrity, torque fasteners to spec, and follow conduit sealing practices. Ensure all accessories (hubs, cable glands) carry