UL 1310
Standard for Class 2 Power Units

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2011-08-26DOD Approved: --
Price Code:BANSI Approved: 2017-01-30
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover indoor and outdoor use Class 2 power supplies and battery chargers. These units utilize an isolating transformer and may incorporate components to provide an alternating- or direct-current output. Each output provides Class 2 power levels in accordance with the National Electrical Code, ANSI/NFPA 70. Maximum output voltage does not exceed 42.4 V peak for alternating current, 60 V for continuous direct current. These products are intended primarily to provide power to low voltage, electrically operated devices. These requirements apply to:

    a)    Portable and semipermanent mounted direct plug-in units provided with 15 A blade configurations for use on nominal 120 or 240 V alternating current branch circuits with a maximum potential of 150 V to ground;

    b)    Cord- and plug-connected units provided with a 15 or 20 A attachment plug configuration for use on nominal 120 or 240 V alternating current branch circuits with a maximum potential of 150 V to ground; and

    c)    Units permanently connected to the input supply for use on nominal 600 V or less alternating or direct current branch circuit.

    Direct plug-in and cord-connected units may also be provided with an integral cigarette lighter connector assembly, or a direct current input jack for being powered from a vehicle battery adapter or from a data port associated with information technology equipment. These units utilize an isolating transformer and may incorporate components to provide an alternating- or direct-current output. Each output provides Class 2 power levels in accordance with the National Electrical Code, ANSI/NFPA 70. Maximum output voltage does not exceed 42.4 V peak for alternating current, 60 V for continuous direct current. These products are intended primarily to provide power to low voltage, electrically operated devices.

    1.2 These requirements cover direct plug-in and cord-connected products whose input power does not exceed 660 W under any possible condition of output loading.

    1.3 These requirements do not cover the effect that a power unit may have on the equipment or system to which it is connected.

    1.4 A product marked for a specific end-use involving additional considerations may be subject to additional requirements found in the applicable end-product standard. See 51.4. Examples include considerations related to:

    a)    Mechanical risks such as those presented by tools;

    b)    Build up of static charges such as those of radio equipment with external antennae connections;

    c)    Special shock limits such as those for medical equipment; and

    d)    Fire risks such as those posed by decorative lighting products.

    1.5 These requirements do not cover products intended to charge batteries for starter motors used to start engines. Products of this type are covered by the Standard for Battery Chargers for Charging Engine-Starter Batteries, UL 1236.

    1.6 These requirements cover Class 2 products, as defined in this standard, intended for use with toys. Products of this type shall also comply with the Standard for Toy Transformers, UL 697.

    1.7 These requirements do not cover products with outputs other than Class 2, nor battery chargers intended to charge batteries employed in wheel chairs or similar types of mobility aids. Products of this type are covered by the Standard for Power Units Other Than Class 2, UL 1012.

    1.8 Products without a rectifier may be covered by the Standard for Low Voltage Transformers – Part 1: General Requirements, UL 5085-1, and the Standard for Low Voltage Transformers – Part 3: Class 2 and Class 3 Transformers, UL 5085-3.

    1.9 These requirements do not cover products powered solely by a dc source. Products of this type are covered by the Standard for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Craft, UL 458, or by other requirements appropriate for the intended application.

    1.10 These requirements do not cover products intended for supplying low voltage landscape lighting. Products of this type are covered by the Standard for Low Voltage Landscape Lighting Systems, UL 1838.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
          • 6 Terminology
        • CONSTRUCTION
          • 7 Mechanical Assembly
          • 8 Enclosure
          • 9 Protection Against Corrosion
          • 10 Switches
          • 11 Protective Devices
          • 12 Components
          • 13 Coil Insulation
            • 13.1 General
            • 13.2 Insulation for transformers
          • 14 Input Connections
            • 14.1 Direct plug-in units
            • 14.2 Cord-connected units
            • 14.3 DC input units
          • 15 Output Connections
            • 15.1 General
            • 15.2 Output wiring
            • 15.3 Output terminals
            • 15.4 Output connectors
            • 15.5 Bushings
          • 16 Accessibility of Live Parts
            • 16.1 General
            • 16.2 Live parts other than exposed wiring terminals
            • 16.3 Exposed wiring terminals
          • 17 Live Parts
          • 18 Strain Relief
          • 19 Internal Wiring
          • 20 Separation of Circuits
          • 21 Insulating Materials
          • 22 Printed-Wiring Boards
          • 23 Grounding
            • 23.1 General
            • 23.2 Bonding conductor
          • 24 Spacings
        • PERFORMANCE
          • 25 General
          • 26 Leakage Current Test
          • 27 Leakage Current Test and Dielectric Voltage Withstand Test After Humidity Exposure
          • 28 Maximum Output Voltage Test
          • 29 Maximum Input Test
          • 30 Output Current and Power Test
            • 30.1 General
            • 30.2 Inherently limited
            • 30.3 Not inherently limited
          • 31 Calibration of Overcurrent Protection Devices Test
          • 32 Full-Load Output Current Test
          • 33 Normal Temperature Test
          • 34 Dielectric Voltage Withstand Test
            • 34.1 General
            • 34.2 Induced potential
          • 35 Endurance Test on Overcurrent- and Overtemperature-Protective Devices
          • 36 Overload and Endurance Tests on Switches and Controls
          • 37 Overload Test on Secondary Switches
          • 38 Operation Test
          • 39 Abnormal Tests
            • 39.1 General
            • 39.2 Output loading
            • 39.3 Output loading – alternate method
            • 39.4 Transformer burnout
            • 39.5 Reverse polarity
            • 39.6 Switch position
            • 39.7 Component breakdown
            • 39.8 Printed-wiring board abnormal operation test
            • 39.9 Backfeed protection
          • 40 Tests on Insulating Materials
          • 41 Strain Relief Test
          • 42 Push-Back Relief Test
          • 43 Direct Plug-In Blade Secureness Test
          • 44 Direct Plug-In Security of Input Contacts Test
            • 44.1 General
            • 44.2 Removable, folding, and retractable blade units
          • 45 Security of Output Connectors Test
          • 46 Abuse Tests
            • 46.1 General
            • 46.2 Impact on direct plug-in units
            • 46.3 Impact on cord connected units
            • 46.4 Rod pressure on direct plug-in units
            • 46.5 Resistance to crushing on direct plug-in units
          • 47 Bonding Conductor Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 48 Dielectric Voltage Withstand Test
          • 49 Grounding Continuity Test
        • RATING
          • 50 General
        • MARKING
          • 51 General
          • 52 Cautionary and Warning Markings
          • 53 Application of Labeling
        • INSTRUCTIONS
          • 54 Instruction Manual
        • OUTDOOR USE
          • 55 General
          • 56 Enclosures
          • 57 Protection Against Corrosion
          • 58 Gaskets
          • 59 Supply Connections
          • 60 Output Connections and Wiring
          • 61 Spacings
          • 62 Accessibility of Live Parts
          • 63 Ground-Fault Circuit-Interrupters
          • 64 Performance
            • 64.1 General
            • 64.2 Abuse tests
            • 64.3 Rain test
            • 64.4 Standing water immersion test
          • 65 Markings
          • 66 Instructions
        • PERMANENTLY-CONNECTED UNITS FOR CONNECTION TO A WIRING SYSTEM
          • 67 General
          • 68 Construction
          • 69 Wiring Terminals and Leads
          • 69A Strain Relief Test
          • 70 Markings
          • 71 Installation Instructions
        • PERMANENTLY-CONNECTED UNITS FOR INSTALLATION IN AN OUTLET BOX
          • 71A General
          • 71B Construction
          • 71C Polymeric Enclosures
          • 71D Spacings
          • 71E Performance
            • 71E.1 General
            • 71E.2 Assembly test
          • 71F Installation Instructions
          • 71G User Instructions
          • 71H Markings
        • POWER UNITS FOR INSTALLATION IN AIR-HANDLING SPACES
          • 72 General
          • 73 Marking
        • POWER UNITS SUPPLIED FROM INFORMATION TECHNOLOGY EQUIPMENT DATA PORTS
          • 74 General
          • 75 Glossary
          • 76 Supply Connections
          • 77 Enclosure
          • 78 Performance
            • 78.1 General
            • 78.2 Abnormal temperature test
            • 78.3 Strain relief test
          • 79 Markings
          • 80 Instructions
        • FLUSH DEVICE COVER PLATES WITH INTEGRAL POWER SUPPLY
          • 81 General
          • 82 Construction
          • 83 Polymeric Enclosures
          • 84 Spacings
          • 85 Configurations
          • 86 Class 2 Output Power Supply Testing
          • 87 Assembly Test
          • 88 Installation Instructions
          • 89 Markings
    • APPENDIX A