UL 935
Standard for Fluorescent-Lamp Ballasts

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2001-05-21DOD Approved: 1983-02-17
Price Code:CANSI Approved: 2014-08-07
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover ballasts of the resistance, reactance, and electronic (high frequency) types for use with fluorescent lamps involving a potential of 2500 volts or less in accordance with the National Electrical Code, ANSI/NFPA 70.

    1.2 A fluorescent-lamp ballast may be determined by investigation to be acceptable for use, in a fixture or other device, with electric-discharge lamps of other than the fluorescent type.

    1.3 Fluorescent self ballasted lamps and ballast adaptors are evaluated using the Standard for Self-Ballasted Lamps and Lamp Adapters, UL 1993. The component ballast is evaluated to requirements in this Standard.

    1.4 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Foreword
      • Body
        • PART 1 – ALL PRODUCTS
          • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Components
          • 4 Units of Measurement
          • 5 Undated References
          • CONSTRUCTION
          • 6 General
          • 7 Mechanical Assembly
          • 8 Enclosure
            • 8.1 General
            • 8.2 Raintightness
          • 9 Means for Mounting
          • 10 Protection Against Corrosion
            • 10.1 General
            • 10.2 Outdoor ballasts
            • 10.3 Weatherproof ballasts
          • 11 Compound
          • 12 Insulating Materials
          • 13 Supply and Load Connections
            • 13.1 Terminal and lead wire compartments
            • 13.2 Lead wires
            • 13.3 Flexible cords
            • 13.4 Bushings
            • 13.5 Strain relief
            • 13.6 Terminals
          • 14 Live Parts
          • 15 Capacitors
          • 16 Protective Devices Provided in Class P Protected Ballasts
          • 17 Protective Devices Provided in Other Than Class P Protected Ballasts
          • 18 Printed Wiring Boards
          • 19 Spacing of Electrical Parts
            • 19.1 General
            • 19.2 Alternate method
          • 20 Polymeric Materials
          • PERFORMANCE
          • 21 General
          • 22 Input/Output Measurements
          • 23 Leakage-Current Test
          • 24 Risk of Electric Shock Measurements
            • 24.1 General
            • 24.2 Ballast lead and lamp pin measurements
            • 24.3 Foil measurement (electronic ballasts)
          • 25 Normal-Temperature Test
          • 26 Abnormal-Temperature Test
          • 27 Fault Condition Test – Conventional Magnetic Ballast – Class P Protection
          • 28 Increased-Ambient Temperature Test for Ballasts – Class P Protection
          • 29 Fault-Condition Test – Electronic Ballasts – Class P Protection
          • 30 Arcing Test
          • 31 Voltage Measurement – Power Capacitors
          • 32 Dielectric Voltage-Withstand Test
          • 33 Insulation-Resistance Test
          • 34 Limited Short-Circuit Test
          • 35 Foil Trace Calibration
          • 36 Metallic-Coating-Thickness Test
          • 37 Water-Spray Test
          • 38 Humidity-Conditioning Test
          • 39 Strain-Relief Test
          • 40 Tests on Push-In Terminals
            • 40.1 Pullout
            • 40.2 Temperature
          • 41 Rod Pressure Loading Test
          • 42 Volume Method of Measurement
          • MANUFACTURING AND PRODUCTION TESTS
          • 43 Dielectric Voltage-Withstand Test
          • RATING
          • 44 General
          • MARKING
          • 45 Details
            • 45.1 General
            • 45.2 Ratings
            • 45.3 High power factor
            • 45.4 Lamps
            • 45.5 Application
            • 45.6 Thermal protection
            • 45.7 Field connection
        • PART 2 – DIRECT PLUG-IN, AND THROUGH CORD BALLASTS
          • CONSTRUCTION
          • 46 Direct Plug-In, and Through Cord Ballasts
            • 46.1 General
            • 46.2 Enclosure integrity
            • 46.3 Weight and moment
            • 46.4 Plug face dimensions
            • 46.5 Wiring details
            • 46.6 Thermal protection
          • 47 Blade Configuration
          • 48 Strain Relief
          • PERFORMANCE
          • 49 Moment and Weight Test
          • 50 Blade Secureness Test
            • 50.1 Pull
            • 50.2 Push
          • 51 Abuse Tests
            • 51.1 General
            • 51.2 Impact
            • 51.3 Rod pressure
            • 51.4 Resistance to crushing
            • 51.5 Accessibility
    • TYPE CC BALLASTS
    • APPENDIX A
    • Appendix B
    • Superseded List