UL 826
Standard for Household Electric Clocks

DETAILS
Edition Number:11SCC Approved:--
Edition Date:2007-11-29DOD Approved: --
Price Code:CANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover electrically operated household clocks having an input rating of not more than 30 watts and 250 volts to be used in ordinary indoor locations in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements do not cover clocks intended primarily for industrial or commercial installations, clocks that form part of a master clock system, outdoor clocks, time stamps, job card recorders, timers, and similar time-indicating and -recording appliances, nor do they cover illuminated clocks intended for use as portable electric lamps or for other illuminating purposes.

    1.3 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
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
        • CONSTRUCTION
          • 4 Frame and Enclosure
            • 4.1 General
            • 4.2 Accessibility of live parts
            • 4.3 Mounting means
            • 4.4 Servicing
          • 5 Corrosion Resistance
          • 6 Mechanical Assembly
          • 7 Supply Connections – Cord-Connected Clocks
            • 7.1 Cords and plugs
            • 7.2 Grounding
            • 7.3 Strain relief
            • 7.4 Bushings
          • 8 Supply Connections – Permanently Connected Clocks
            • 8.1 General
            • 8.2 Grounding
            • 8.3 Terminals
            • 8.4 Leads
          • 9 Live Parts
          • 10 Insulating Material
          • 11 Internal Wiring
          • 12 Coil Windings
          • 13 Spacings
          • 14 Secondary Circuits
            • 14.1 General
            • 14.2 Connections to frame
            • 14.3 Separation of circuits
        • PERFORMANCE
          • 15 Leakage Current Test
          • 16 Leakage Current Test Following Humidity Conditioning
          • 17 Current Input Test
          • 18 Temperature Test
          • 19 Dielectric Voltage-Withstand Test
            • 19.1 General
            • 19.2 Primary circuits
            • 19.3 Secondary circuits
          • 20 Transformer Abnormal Operation Test
            • 20.1 General
            • 20.2 15-day abnormal operation
          • 21 Secondary Circuit Component Failure, Abnormal Operation Test
          • 22 Stability Test of Floor-Standing Clocks
          • 23 Enclosure Abuse (Drop) Test
          • 24 Mounting Means Test
          • 25 Strain Relief Test
          • 26 Impact Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 27 Production-Line Dielectric Voltage-Withstand Test
          • 28 Grounding Continuity Test
            • 28.1 Continuity of grounding connection
            • 28.2 Electrical indicating device
        • RATINGS
          • 29 General
        • MARKINGS
          • 30 General
    • APPENDIX A