UL 2108
Standard for Low Voltage Lighting Systems

DETAILS
Edition Number:2SCC Approved:--
Edition Date:2015-12-07DOD Approved: --
Price Code:BANSI Approved: 2017-05-30
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements apply to low voltage lighting systems and components intended for permanent installation and for use in locations in accordance with the National Electrical Code, NFPA 70, Article 411.

    1.2 These requirements cover:

    a) Power units in which output is limited to 25 A and below the risk of electric shock voltage levels as defined in 3.19; and

    b) Class 2, exposed bare conductor, POE, and other low-voltage luminaires and lighting systems.

    1.3 These requirements do not cover low-voltage luminaires with integral power supplies or luminaires covered by other standards such as, but not limited to, the Standard for Portable Electric Luminaires, UL 153, the Standard for Track Lighting Systems, UL 1574, or the Standard for Luminaires, UL 1598.

    1.4 Light emitting diode (LED) components and subassemblies integral to a low voltage luminaire or power unit covered by this standard shall comply with the applicable requirements of the Standard for Light Emitting Diode (LED) Equipment for Use in Lighting Products, UL 8750.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • Part
          • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Glossary
          • 4 Components
          • 5 Undated References
          • 6 Organization and Application
        • PART I – POWER UNITS
          • GENERAL
          • 7 General
          • CONSTRUCTION – MECHANICAL
          • 8 General Construction
          • 9 Enclosure
          • 10 Openings
          • 11 Recessed Housings
          • 11A Equipment for Use in Environmental Air-Handling Spaces (Plenums)
          • 12 Corrosion Protection
          • 13 Damp and Wet Locations
          • CONSTRUCTION – ELECTRICAL
          • 14 Current-Carrying Parts
          • 15 Conductors and Cords
          • 16 Splices and Connections
          • 17 Transformer
          • 18 Electronic Power Supply
          • 19 Protective Devices
          • 20 Electronic Circuits
          • 21 Switches
          • 22 Accessibility to Live Parts
          • 23 Electrical Spacings
          • 24 Electrical Barriers
          • 25 Electrical Insulation
          • 26 Separation of Circuits
          • 27 Grounding and Bonding
          • 28 Supply Connections
          • 29 Secondary Connections
          • 30 Exposed Bare and Insulated Conductors
          • 31 Mounting Means
          • PERFORMANCE
          • 32 General
          • 33 Input and Output Tests
            • 33.1 Input test
            • 33.2 Maximum output test
          • 34 Normal Temperature Test
            • 34.1 General
            • 34.2 Power units
            • 34.3 Additional test conditions
          • 35 Abnormal Recessed Temperature Test
          • 36 Overload Test
          • 37 Dielectric Voltage Withstand Test
          • 38 Exposed Bare Conductor Abnormal Operation Test
          • 39 Component Fault Test
          • 40 Grounding Continuity Test
          • 41 Strain Relief for Flexible Cord Test
          • 42 Mounting Means Test
            • 42.1 Tension loading
            • 42.2 Gravity loading
            • 42.3 Test Results
          • 43 Insulated Conductor Dielectric Withstand Test
          • 44 Loose Luminaire/Connection Test
          • 45 Insulation-Piercing Terminal Temperature Test
          • MANUFACTURING AND PRODUCTION TESTS
          • 46 Dielectric Voltage Withstand Test
          • 47 Continuity of Grounding Connection Test
          • MARKING
          • 48 Details
            • 48.1 General
            • 48.2 Power units
            • 48.3 Wall and ceiling surface mount
            • 48.4 Under-cabinet and cabinet mount
            • 48.5 Recessed mounting
            • 48.6 Pictograph type markings
          • INSTALLATION INSTRUCTIONS
          • 49 Power Units
          • 50 Exposed Bare Conductors
        • PART II – EXPOSED BARE CONDUCTOR LUMINAIRES AND CLASS 2 LUMINAIRES
          • GENERAL
          • 51 General
          • CONSTRUCTION – MECHANICAL
          • 52 General Construction
          • 53 Enclosure
          • 54 Mounting Means
          • 55 Glassware
          • 56 Tungsten-Halogen Lamp Containment Barrier and UV Filter
          • CONSTRUCTION – ELECTRICAL
          • 57 Leads and Conductors
          • 58 Splices
          • 59 Supply Connections
          • PERFORMANCE
          • 60 Normal Temperature Test
          • 61 Abnormal Recessed Temperature Test
          • 62 Luminaire Drop Impact Test
          • 63 Strain Relief for Conductor Test
          • 64 Mounting Means Test
          • 65 Abnormal Operations Test
          • 66 Luminaire Component Fault Test
          • MARKINGS
          • 67 Details
            • 67.1 General
            • 67.2 Exposed bare conductor luminaires
            • 67.3 Class 2 luminaires
          • INSTRUCTIONS
          • 68 General
        • PART III – OTHER LUMINAIRES
          • GENERAL
          • 69 General
          • CONSTRUCTION
          • 70 Mechanical Construction
          • 71 Electrical Construction
          • PERFORMANCE
          • 72 General
          • MARKING AND INSTRUCTIONS
          • 73 General
          • SUPPLEMENTARY REQUIREMENTS
          • 74 Incandescent Luminaires
          • 75 Fluorescent Luminaires
          • 76 Surface Mounted Luminaires
          • 77 Recessed Mounted Luminaires
    • APPENDIX A