UL 813
Standard for Commercial Audio Equipment

DETAILS
Edition Number:7SCC Approved:--
Edition Date:1996-12-13DOD Approved: --
Price Code:DANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover power-operated audio equipment and accessories, rated 300 volts or less, that are intended for use in commercial enterprises or establishments and other locations such as churches, schools, theaters, and factories. This equipment is for use on supply circuits in accordance with the National Electrical Code, NFPA 70 .

    1.2 Commercial audio equipment includes amplifiers, preamplifiers, mixers, signal processors, public address and centralized sound systems, intercommunicating devices and systems, phonographs, tape players, and recorders, radio receivers, tuners, and tuner-amplifiers, power supplies intended for use with commercial sound systems, special effects units, and integral amplifier-speakers.

    1.3 These requirements also cover accessories for use with commercial audio equipment such as tape erasers and head demagnetizers.

    1.4 These requirements do not cover equipment that is covered by individual requirements separate from this standard such as:

    a)    Dictating and transcribing machines for office use;

    b)    Musical instruments and accessories for non-professional use;

    c)    Household type amplifiers, tuner-amplifiers, phonographs, radio receivers, and recorders; and

    d)    Amateur radio equipment.

    1.5 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.


    1.5 revised December 7, 1999

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Foreword
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
        • CONSTRUCTION
          • 4 General
          • 5 Enclosures
            • 5.1 General
            • 5.2 Corrosion resistance
          • 6 Mechanical Assembly
          • 7 Supply Connections – Permanently Connected Equipment
            • 7.1 General
            • 7.2 Separation of circuits
            • 7.3 Wiring terminals
          • 8 Supply Connections – Cord- and Plug-Connected Equipment
            • 8.1 General
            • 8.2 Power supply cords and cord sets
            • 8.3 Appliance coupler
            • 8.4 Cord strain relief
            • 8.5 Cord push-back relief
            • 8.6 Cord-bearing surface
            • 8.7 Cord and wire routing
            • 8.8 Attachment plug
            • 8.9 Bushings
          • 9 Audio Output Connections
          • 10 Auxiliary Power Connections
          • 11 Lampholders
          • 12 Receptacles
          • 13 Switches
            • 13.1 General
            • 13.2 Switch current rating
          • 14 Protective Devices
            • 14.1 General
            • 14.2 Circuits
            • 14.3 Fuses
            • 14.4 Battery circuit protection
          • 15 Capacitors
          • 16 Batteries
            • 16.1 General
            • 16.2 Automotive-type battery cord connections
          • 17 Motors
          • 18 Coil Windings
          • 19 Sleeving, Tape, Tubing, and Wire Insulation
            • 19.1 General
            • 19.2 Mechanical protection
            • 19.3 Primary wiring
            • 19.4 Types of wire
          • 20 Remote Control and Interconnecting Cables
          • 21 Splices and Connections
            • 21.1 General
            • 21.2 Wire-wrapped connections
            • 21.3 Aluminum terminations
          • 22 Friction-Fit Electrical Connectors
          • 23 Connector and Component Displacement
          • 24 Integrated Circuits
          • 25 Materials
            • 25.1 General
            • 25.2 Guard and barrier insulating material (to render live parts inaccessible)
          • 26 Spacings
            • 26.1 Field-wiring terminals
            • 26.2 Primary circuits
            • 26.3 Secondary circuits
            • 26.4 Barriers and liners
          • 27 Grounding
            • 27.1 General
            • 27.2 Cord connected equipment
            • 27.3 Permanently connected equipment
          • 28 Separation of Circuits
          • 29 Live Parts
          • 30 Electric Shock
            • 30.1 Shock current and voltage
            • 30.2 Leakage current
            • 30.3 Transient electric shock
            • 30.4 Antenna connections
          • 31 Risk of Fire
          • 32 Low-Voltage, Limited-Energy Circuits
          • 33 Nonhazardous Secondary Circuits
          • 34 Accessibility of Live Parts
            • 34.1 General
            • 34.2 Adjustment opening
            • 34.3 Top opening
            • 34.4 Protective screens and barriers
            • 34.5 Control shaft
            • 34.6 Captive part
            • 34.7 Octal base tube socket
            • 34.8 Interlocks
          • 35 User Servicing
          • 36 Field-Installed Accessories
          • 37 Protection Against Injury To Persons
            • 37.1 General
            • 37.2 Power-operated moving parts
            • 37.3 Enclosures and guards
            • 37.4 Sharp edges and projections
        • PERFORMANCE
          • 38 General
            • 38.1 Alternating-current and direct-current equipment
            • 38.2 Voltmeters
            • 38.3 Cheesecloth indicators
            • 38.4 Supply circuit voltage and frequency
          • 39 Operation Test
          • 40 Leakage Current and Shock Current Tests
            • 40.1 Leakage current
            • 40.2 Electric shock current
            • 40.3 Electric shock at audio output under fault conditions
          • 41 Power Output and Power Input Tests
            • 41.1 Power output
            • 41.2 Power input
          • 42 Temperature Test
            • 42.1 General
            • 42.2 Rack-mounted equipment
            • 42.3 Portable equipment
          • 43 Audio Output Maximum Voltage Test
          • 44 Maximum Voltage Test
          • 45 Dielectric Voltage-Withstand Test
            • 45.1 General
            • 45.2 Primary circuits
            • 45.3 Isolating power transformer
            • 45.4 Primary insulation
            • 45.5 Output circuit
            • 45.6 Power transformer secondary
            • 45.7 Direct-connected power supply
            • 45.8 Printed wiring assembly
          • 46 Test For Low-Voltage, Limited-Energy Circuits
          • 47 Test For Nonhazardous Secondary Circuits
          • 48 Abnormal Operation Test
            • 48.1 General
            • 48.2 Power supply tests
            • 48.3 Short-circuit test
            • 48.4 Abnormal temperature test
            • 48.5 Protective devices
          • 49 Battery Test
            • 49.1 Battery supply test
            • 49.2 Battery overcharge test
            • 49.3 Battery discharge test
            • 49.4 Battery drop test
            • 49.5 Battery oven test
            • 49.6 Test results
          • 50 Switching Device Test
          • 51 Solid State Switch Test
            • 51.1 Abnormal operation test
            • 51.2 Voltage surge test
          • 52 Tests For Remote Control and Interconnecting Cables
            • 52.1 Cable short circuit
            • 52.2 Cable arcing test
          • 53 Strain Relief and Connectors Test
          • 54 Pushback Relief Test
          • 55 Flexing Test
          • 56 Strength of Enclosure Test
            • 56.1 General
            • 56.2 Enclosure loading test
            • 56.3 Pressure test
            • 56.4 Impact test
            • 56.5 Back cover impact and bending test
            • 56.6 Drop test
            • 56.7 Handle strength test
            • 56.8 Mounting means test
            • 56.9 Stability test
          • 57 Test for Permanence of Markings
          • 58 Grille Cloth Test
          • 59 Field-Installed Accessory Test
        • MANUFACTURING AND PRODUCTION-LINE TESTS
          • 60 Production-Line Dielectric Voltage-Withstand Test
          • 61 Production-Line Grounding Continuity Test
        • RATINGS
          • 62 General
        • MARKINGS
          • 63 Marking Type and Size
          • 64 Identification and Ratings
            • 64.1 General
            • 64.2 Accessory identification
            • 64.3 User serviceable components
            • 64.4 Factory identification
            • 64.5 Parallel slot receptacle
            • 64.6 Nonstandard type receptacle
            • 64.7 Auxiliary power connections
            • 64.8 Protective devices replacement
            • 64.9 Audio output
            • 64.10 Input voltage selector
            • 64.11 Multiple input voltage
            • 64.12 Wire temperature
            • 64.13 Equipment rack system
          • 65 Cautionary and Warning Markings
            • 65.1 User serviceable parts
            • 65.2 Interlock warning
            • 65.3 Fuse replacement
            • 65.4 Battery replacement
            • 65.5 Exposure warning
            • 65.6 Graphical symbols
          • 66 Instructions
            • 66.1 General
            • 66.2 Accessory installation instructions
    • APPENDIX A