UL 464A
Standard for Audible Signal Appliances for General Signaling Use

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2016-02-03DOD Approved: --
Price Code:AANSI Approved: 2016-02-03
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover electrically and electronically operated bells, buzzers, horns, and similar audible signal appliances, rated 300 volts or less, for commercial general signaling service and intended for indoor or outdoor locations or both in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements cover audible signal appliances for use in ordinary locations. Audible signal appliances for use in hazardous locations, as defined in the National Electrical Code, NFPA 70, are judged on the basis of their compliance with these requirements and further appropriate examination and tests to determine if they are acceptable for such use.

    1.3 These requirements do not cover door bells, buzzers, and chimes used in household and similar applications and intended for operation on Class 2 signal circuits as defined in the National Electrical Code, NFPA 70.

    1.4 These requirements do not cover audible signaling appliances intended for fire alarm or emergency communications use as defined by the National Fire Alarm and Signaling Code, NFPA 72.

    1.5 A supplemental visual signal incorporated as part of an audible signal appliance shall also comply with the requirements of this Standard.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
        • CONSTRUCTION
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
            • 2.4 Electrical circuits terminology
          • 3 Enclosures
            • 3.1 General
            • 3.2 Cast metal
            • 3.3 Sheet metal
            • 3.4 Nonmetallic
            • 3.5 Ventilating openings
          • 4 Electric Shock
          • 5 Protection Against Corrosion
          • 6 Field Wiring System Connections
            • 6.1 General
            • 6.2 Compartment
            • 6.3 Terminals or leads
            • 6.4 Grounding terminals and leads
            • 6.5 Grounded supply terminals and leads
          • 7 Internal Wiring
            • 7.1 General
            • 7.2 Wireways
            • 7.3 Splices
            • 7.4 Barriers
            • 7.5 Bushings
            • 7.6 Strain relief
          • 8 Bonding for Grounding
          • 9 Components
            • 9.1 Mounting
            • 9.2 Operating parts
            • 9.3 Current carrying parts
            • 9.4 Coil windings
            • 9.5 Connectors and receptacles
            • 9.6 Electrical insulating material
            • 9.7 Motors
          • 10 Spacings
        • PERFORMANCE
          • ALL APPLIANCES
          • 11 General
            • 11.1 Test samples
            • 11.2 Test voltages
            • 11.3 Temperature measurements
            • 11.4 Additional tests
          • 12 Current Input Test
          • 13 Overvoltage and Undervoltage (Current) Test
            • 13.1 Overvoltage (current) test
            • 13.2 Undervoltage (current) test
          • 14 Variable Ambient Temperature Test
          • 15 Polarity Reversal Test
          • 16 Component Temperature Test
          • 17 Electric Shock Current Test
          • 18 Endurance Test
          • 19 Transient Test
            • 19.1 General
            • 19.2 Supply-line transients (high-voltage appliances)
          • 20 Jarring and Vibration Tests
            • 20.1 Jarring Test
            • 20.2 Vibration test
          • 21 Dielectric Voltage-Withstand Test
          • 22 Burnout Test
          • 23 Polymeric Materials Test
            • 23.1 General
            • 23.2 Temperature test
            • 23.3 Flame test
            • 23.4 Impact test
          • 24 Locked Rotor Test
            • 24.1 General
            • 24.2 Thermal or overcurrent protection
            • 24.3 Impedance protection
          • 25 Elastomeric Materials Tests
            • 25.1 General
            • 25.2 Accelerated aging by oven-conditioning method
            • 25.3 Accelerated aging of flexible cellular materials
          • INDOOR USE APPLIANCES
          • 26 Humidity Test
          • OUTDOOR USE APPLIANCES
          • 27 General
          • 28 Rain Test
          • 29 Variable Ambient Temperature Test
          • 30 Humidity Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 31 Production-Line Dielectric Voltage-Withstand Test
          • 32 Production-Line Grounding-Continuity Test for High-Voltage, Cord-Connected Products
        • RATING
          • 33 General
        • INSTALLATION AND OPERATING INSTRUCTIONS
          • 34 General
        • MARKING
          • 35 General
    • APPENDIX A