UL 844
Standard for Luminaires for Use in Hazardous (Classified) Locations

DETAILS
Edition Number:13SCC Approved:--
Edition Date:2012-06-29DOD Approved: 1989-06-06
Price Code:CANSI Approved: 2016-03-11
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover fixed and portable luminaires for installation and use in hazardous (classified) locations, Class I, Divisions 1 and 2, Groups A, B, C, and D; Class II, Division 1, Groups E, F, and G; Class II, Division 2, Groups F and G; and Class III, Divisions 1 and 2, in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements also cover luminaires for installation and use in Class I, Zones 1 and 2, Groups IIA, IIB, IIB plus Hydrogen, and IIC, and Zone 20, 21 and 22 hazardous (classified) locations in accordance with the National Electrical Code, NFPA 70.

    1.3 These requirements cover luminaires for use only under the following atmospheric conditions:

    a)    A minimum ambient temperature of minus 25°C (minus 13°F);

    b)    An oxygen concentration not greater than 21 percent by volume; and

    c)    A nominal barometric pressure of one atmosphere.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • Part
          • INTRODUCTION
          • 1 Scope
          • 2 General
          • 3 Components
          • 4 Units of Measurement
          • 5 Undated References
          • 6 Class, Zone, and Group Equivalency
            • 6.1 Class I, Zone 1, Group IIA
            • 6.2 Class I, Zone 1, Group IIB
            • 6.3 Class I, Zone 1, Group IIB plus hydrogen
            • 6.4 Class I, Zone 1, Group IIC
            • 6.5 Class I, Zone 2, Group IIA
            • 6.6 Class I, Zone 2, Group IIB
            • 6.7 Class I, Zone 2, Group IIB plus hydrogen
            • 6.8 Class I, Zone 2, Group IIC
            • 6.9 Zone 20 and 21
            • 6.10 Zone 22
          • 7 Luminaires Subject to Deposits of Combustible-Paint Residue
          • 8 Enclosure Types
        • PART I – LUMINAIRES FOR CLASS I, DIVISION 1, GROUPS A, B, C, AND D, AND CLASS II, DIVISION 1, GROUPS E, F, AND G LOCATIONS
          • CONSTRUCTION
          • 9 Enclosure Material
          • 10 Enclosure Thickness
            • 10.1 Enclosures for Class I locations
            • 10.2 Enclosures for Class II locations
          • 11 Joints in Enclosures for Class I Locations
            • 11.1 General
            • 11.2 Luminaires for Class I, Groups C and D locations
            • 11.3 Luminaires for Class I, Group B locations
            • 11.4 Luminaires for Class I, Group A locations
          • 12 Joints in Enclosures for Class II, Groups E, F, and G Locations
          • 13 Holes in Enclosure
            • 13.1 Luminaires for Class I locations
            • 13.2 Luminaires for Class II locations
          • 14 Shaft Openings
            • 14.1 General
            • 14.2 Luminaires for Class I locations
            • 14.3 Luminaires for Class II locations
          • 15 Guards of Luminaires for Classes I and II Locations
          • 16 Nonmetallic External Parts
          • 17 Supply Connections
            • 17.1 Luminaires for Class I locations
            • 17.2 Luminaires for Class II locations
            • 17.3 Leads
          • 18 Disconnecting Means
          • 19 Protection Against Corrosion
          • 20 Materials Applied to Joint Surfaces
          • 21 Fuses
          • 22 Grounding and Bonding
          • 23 Porosity in Enclosure Materials
          • 24 Luminaires for Wet Locations
          • PERFORMANCE
          • 25 Temperature Test
          • 26 Explosion Tests
          • 27 Tests on Luminaires with Fuses
          • 28 Hydrostatic Pressure Test
          • 29 Dust-Penetration Test
          • 30 Thermal Shock Test
          • 31 Rust-Resistance Test
          • 32 Test for Secureness of Conduit Hubs
            • 32.1 General
            • 32.2 Pullout
            • 32.3 Bending
          • 33 Vibration Test
          • 34 Electrical Resistance Test
          • 35 Non-Metallic Enclosure Materials Tests – Class I
            • 35.1 General
            • 35.2 Chemical compatibility by material samples
            • 35.3 Chemical compatibility by complete end product tests
            • 35.4 Test for Accumulation of Static Electricity
          • 36 Tests on Sealing Compounds
          • 37 Non-Metallic Enclosure Tests – Class II
          • 38 Leakage Test on Factory-Installed Conduit Seals
        • PART II – LUMINAIRES FOR CLASS I, DIVISION 2, GROUPS A, B, C, AND D LOCATIONS
          • GENERAL
          • 39 Details
          • CONSTRUCTION
          • 40 Enclosure
            • 40.1 General
            • 40.2 Supply connections
            • 40.3 Luminaires for wet locations
            • 40.4 Protection against corrosion
          • 41 Arcing and Sparking Parts
          • PERFORMANCE
          • 42 Temperature Test
        • PART III– LUMINAIRES FOR CLASS II, DIVISION 2, GROUPS F AND G AND CLASS III LOCATIONS
          • GENERAL
          • 43 Details
          • CONSTRUCTION
          • 44 Enclosure
          • 45 Supply Connections
          • 46 Control Devices
          • 47 Protection Against Corrosion
          • PERFORMANCE
          • 48 Temperature Test
          • 49 Dusttight Enclosure Test
            • 49.1 General
        • PART IV – PORTABLE LUMINAIRES
          • GENERAL
          • 50 Details
          • 51 Protection of Glass Parts
          • 52 Seal Between Lamp and Terminal Compartments
          • 53 Supply Connections
            • 53.1 Cords, plugs, and provision for connection
          • 54 Terminal enclosure
            • 54.1 Class I
            • 54.2 Class II
          • 55 Cord Clamp and Strain Relief
          • 56 Attachment of Parts
          • 57 Hook and Handle
          • 58 Casters and Wheels
          • 59 External Metal Parts
          • 60 Switches
          • 61 Spacings
          • PERFORMANCE
          • 62 Temperature Test
          • 63 Accelerated Aging Test of Bushing
          • 64 Thread-Wear Test
          • 65 Strain-Relief Test
          • 66 Rough-Usage Test
          • 67 Drop Test
          • 68 Impact Test
          • 69 Overturning Test
          • 70 Stability Test
          • 71 Resistance Test
        • PART V – MANUFACTURING AND PRODUCTION TESTS
          • 72 Bonding Test on Portable Luminaires
          • 73 Hydrostatic Pressure Test
        • PART VI – MARKING
          • 74 Details
    • LUMINAIRES INTENDED FOR FLUSH MOUNTING IN PAINT SPRAY AREAS