Class 1 Div 2 Lighting
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Our Class 1 Division 2 LED Lights for Hazardous Locations include LED fixtures for classified areas involving flammable gases or vapors. Available fixture specifications cover Class I gas Groups A, B, C, and D, multiple T-ratings, ambient temperature ranges, voltages, lumen outputs, optics, and environmental ratings. Mounting configurations include pendant, ceiling, wall, yoke, and surface options. Depending on the model, fixtures may carry UL, ETL, CSA, or other applicable listings and certifications, along with wet-location or IP ratings, corrosion-resistant construction, and controls compatibility.
Common applications for these fixtures include classified areas associated with fuel storage and transfer, petroleum processing, chemical handling, aircraft maintenance, marine and offshore facilities, paint and finishing operations, and natural gas facilities. They are also used in documented Class I Division 2 locations within refineries, chemical plants, fuel-storage facilities, aircraft hangars, wastewater facilities, and manufacturing plants. Product configurations accommodate classified areas where flammable gases or vapors are normally contained within closed systems but may be released during leakage, equipment failure, system rupture, malfunction, or ventilation failure.
What Is Class I Division 2 LED Lighting?
Class I Division 2, commonly shortened to Class 1 Div 2 or C1D2, applies to hazardous locations involving flammable gases or vapors where ignitable concentrations are not normally present during normal operation, but may occur because of abnormal conditions such as leakage, equipment failure, closed-system rupture, or ventilation failure.
These conditions may occur where flammable materials are normally contained within closed systems or where ventilation helps prevent hazardous concentrations from developing. Classification applies to the specific installation area, not automatically to an entire refinery, fuel facility, aircraft hangar, chemical plant, or similar operation.
Class I Division 2 also does not mean every luminaire uses the same enclosure design or protection method. Select the fixture from its actual hazardous-location markings, listing, environmental ratings, and the requirements established for the project.
Area classification should come from facility documentation, engineering or classification drawings, project specifications, the AHJ, or another qualified source. LED Lighting Supply can then help match those requirements to appropriate fixture options.
Gas Groups and Temperature Rating
Class I locations may involve Groups A, B, C, and D. The Group identifies the gas or vapor characteristics relevant to hazardous-location equipment.
| Gas Group | Common Examples |
|---|---|
| A | Acetylene |
| B | Hydrogen and gases or vapors of equivalent classification |
| C | Ethylene and gases or vapors of equivalent classification |
| D | Propane, methane, gasoline vapors, benzene, and similar materials depending on classification |
The fixture also needs a temperature rating appropriate for the hazardous material. A correct Division and Group marking does not make a luminaire suitable if its permitted surface temperature is too high. Review the T-rating together with the fixture’s marked ambient range.
Arizona Algae Products New Explosion-Proof Workspace Case Study
The Backstory
Arizona Algae Products LLC was moving its warehouse operation to a newly constructed building and needed lighting for the center section of the space, which included two platforms, a walkway, and equipment that could create shadowing issues. They initially had only a rough estimate of what they might need and were seeking guidance on lighting for hazardous locations, wattage, fixture count, placement, and overall layout. The Director of Facilities and Maintenance, Christopher Knizeski, reached out to LED Lighting Supply and was paired up with Product Specialist Jake Hoffman for expert support in these areas.
The Customer Challenge
The customer knew they needed Class 1 Division 2 (C1D2) rated lighting for the area. This means flammable gases, vapors, or liquids could be present under abnormal conditions, such as equipment leaks or ventilation failures. Due to these factors, the area required an explosion-proof lighting solution. The fixtures needed to meet the safety demands of the environment while delivering strong, uniform illumination for a functional work area.
As the conversation developed, it became clear this wasn't a simple fixture installation. The customer needed to light a new warehouse workspace in a building that was still being constructed. The section being lit was obstructed by equipment and piping, all of which created the potential for shadowing and dark spots. The customer needed an expert's guidance to ensure the final lighting plan would support visibility, safety, and day-to-day work in the warehouse.
Lighting Plan We Created for the Customer
Lighting Plan Metrics
- Mounting Height: 20 ft
- Foot Candles Achieved: 62 average
- Product(s) Used: MLLG-E-LED-EXPLA-200-50-[V]-C1D2
What Matters When Selecting the Light?
Once the classification is established, start with the gas or vapor requirement and T-rating. Then consider the actual operating environment: moisture, corrosion, washdown, chemicals, vibration, outdoor exposure, ambient temperature, voltage, and mounting method can all affect product choice.
Lighting performance is a separate part of the decision. Lumens, optics, fixture spacing, mounting height, foot-candles, and uniformity determine whether the selected fixtures will adequately illuminate the space. A hazardous-area photometric plan can address those questions without being used as a substitute for hazardous-area classification.
Common Class I Division 2 Lighting Applications
Class I Division 2 lighting is used in specific areas where flammable gases or vapors are not normally present in ignitable concentrations but may be released under abnormal conditions. A facility can contain Division 1, Division 2, and unclassified areas, so use the documented classification for the exact fixture location rather than the industry name alone.
- Oil, gas, and fuel operations: C1D2 areas may occur around production, processing, storage, transfer, pumping, metering, and related equipment where flammable gases or vapors are normally contained but could be released through leakage, equipment failure, or other abnormal conditions. See guidance for oil and gas facilities, refineries, oil fields, pipeline facilities, and offshore oil rigs.
- Chemical, solvent, and flammable-vapor processes: Classified Division 2 locations may also occur in chemical plants, paint and finishing areas, distilleries, hydrogen facilities, biofuel facilities, and hazardous material storage areas where gases or vapors are normally contained but abnormal releases are possible.
- Energy, utility, and marine facilities: Certain areas within battery energy storage systems, water and wastewater treatment plants, ship engine rooms and marine facilities, and power generation facilities may also require C1D2 lighting when the documented classification identifies a Division 2 gas or vapor hazard.
For any of these applications, confirm the required gas Group, T-rating, ambient range, environmental conditions, voltage, mounting method, and product listing for the specific installation area.
Electrical Installation and Product Listings
The complete electrical installation matters. The permitted wiring method, conduit or cable system, boxes, fittings, seals where required, grounding, bonding, switches, controls, and other components must be appropriate for the classified location.
Hazardous-location lighting should be installed by qualified electrical professionals in accordance with applicable codes, product listings, manufacturer instructions, and local requirements. Do not alter listed equipment or use components or connection methods that are not permitted by the listing.
Safety and Performance Certifications: Hazardous-location markings and certifications are model-specific. Products may carry UL, ETL, CSA, or other applicable listings depending on the fixture and project. Review the exact model for its hazardous-location suitability, gas or vapor requirements, T-rating, ambient range, environmental ratings, voltage, mounting, and controls.
Warranty and Product Support
Many Class I Division 2 LED fixtures include a 5-year warranty unless otherwise specified, with warranty support based in the USA.
If your project’s classification is already documented, LED Lighting Supply can help narrow fixture options and provide a hazardous-area lighting design for fixture placement, quantity, mounting height, foot-candles, and uniformity.
If the area instead requires Division 1 equipment, see our Class I Division 1 LED Lighting options.
Class 1 Div 2 Lighting FAQs
Can Class I Division 2 Lighting Be Selected Based On Facility Type Alone?
No. Classification applies to the specific fixture location, and a single facility can include Division 1, Division 2, and unclassified areas. Use documented area classification rather than the industry or facility name alone.
What Should Be Confirmed Before Choosing A Class I Division 2 Fixture?
Confirm the required gas Group, T-rating, ambient range, environmental conditions, voltage, mounting method, and product listing for the exact installation area. Lighting output, optics, spacing, mounting height, foot-candles, and uniformity should then be evaluated separately.
Why Do Gas Group And T-Rating Matter For Class I Division 2 Lighting?
The fixture must match the applicable gas or vapor Group and have a temperature rating suitable for the hazardous material. A correct Division and Group marking alone is not sufficient if the permitted fixture surface temperature is too high.
Can A Hazardous-Area Photometric Plan Help With Class I Division 2 Lighting?
Yes. A hazardous-area photometric plan can help determine fixture placement, quantity, mounting height, foot-candles, and uniformity. It does not replace the documented hazardous-area classification for the installation location.