Overview
Explosion Proof exit signs are available in Class 1 division 1 and Class 1 division 2 conditions. Designed for hazardous locations that produce combustible gases and vapors, these fixtures have airtight housings to protect internal circuitry, which pose a sparking hazard that could cause an explosion. Hence the name 'explosion proof.'
Divisions refer to the likelihood of such gases being present in day-to-day operations. Division 1 is the most serious environment, as these gases are always present. Division 2 areas don't usually contain flammable agents, though sudden introduction could occur at any time.
Features
- For Class 1 Division 1 & 2 hazardous locations
- UL 844, 924, and 1604 Listed for use in the United States
- NEMA 3, 4, 4x, and 12 Rated
- Vandal proof polycarbonate faceplate
- 5 year warranty
- Sealed push-to-test button with LED charging indicator
- Cast-aluminum housing
External Specifications
Explosion proof exit signs have flame and impact-resistant cast aluminum housings with a gasketed access panel that creates a hermetic seal over the inner circuitry. The 'exit' lettering is protected by a clear shatter-resistant polycarbonate faceplate and fastened by stainless steel screws.
Internal Specifications
Explosion proof exit signs are lit by an LED (Light Emitting Diode) strip and uses only 5 watts of electricity. They are available in red or green options. These models include an automated self-diagnostic that greatly reduces maintenance time and cost. An LED display gives a visual readout of the unit's battery and overall readiness.
Electrical Specifications
- 120/277v AC power
- Surge-protected, solid-state circuitry for charging the battery
- 220v, 240v and other voltages available upon request
- Low voltage disconnect, AC lockout, and brownout protection
- Sealed test-button for manual diagnostic
Battery Specifications
Nickel Cadmium (NiCad) battery will light these exit signs for a minimum of 90 minutes during a power failure. The expected lifespan of NiCad batteries is 5-7 years.
AC-only models have no battery at all and are available for facilites with external emergency battery power.
Code Compliance
- Class 1 Division 1 & 2 for groups A, B, C, and D
- UL 924, 844 and 1604 Listed in the United States
Warranty
PARTS - Three-year warranty on parts
BATTERY - four-year prorated warranty on lead calcium battery, five-year for nickel cadmium
Maintenance Profile
Periodic testing must be performed at monthly and yearly intervals if the self-diagnostic option is waived. This ensures the lamps and battery will work properly during a power failure.
Lifespan
8-10 year expected lifespan. Replacement components are available.
Options
Internal Battery Heater - Enables the battery backup to operate in below-freezing temperatures.
Self-Diagnostic - This option drastically reduces maintenance needs. An LED display gives constant status reports on the unit.
