UL 1492
Audio-Video Products and Accessories

DETAILS
Edition Number:2SCC Approved:--
Edition Date:1996-04-30DOD Approved: --
Price Code:BANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover audio and video products intended for use on supply circuits in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements, where applicable, cover:

    a)    Audio products and accessories intended for household use and involved with the reproduction or processing of audio signals. Examples of such products include amateur radio products, amplifiers, intercommunicating devices, phonographs, radio clocks, radio-phonographs, radio receivers, record players, tape players, tape recorders, transceivers, tuners, tuner-amplifiers, and similar products.

    b)    Video products that are intended for household or commercial use, and that receive signals in ways such as off the air, through a CAT/MATV cable system, from a video-recorded medium, or from image-producing units. Examples of such products are video tape recorders; video-receiving, -processing, -recording, -producing, and -amplification products; television-antenna amplifiers; cable television (CAT) converters; television tuners; television receivers and monitors; television cameras; and similar products.

    c)    Auxiliary products and accessories intended for use with audio or video products wherein the auxiliary and accessory products are separate and do not perform the desired function, but are used in addition to or as a supplement to products according to (a) and (b). Examples of such products include character generators, editing controllers, video switches and encoders, CRT degaussers, video tape rewinders, head demagnetizers, tape erasers, and similar products.

    d)    Video products intended for entertainment purposes in ordinary locations of health-care facilities.

    e)    Cellular telephones and similar transceiving devices used on a vehicle, boat, or the like where the telephone interconnects to the telephone network through a radio transmitter and receiver.

    f)    Portable audio or video products of the types described in (a) – (c) and (e) that are intended for use with a marine or any other battery circuit as the power supply means.


    1.2 revised effective December 1, 1998

    1.3 Battery chargers and power supplies, whether portable or for permanent installation and not packaged with or specifically referenced in literature packaged with a product but intended for use with audio or video products, are categorized as battery chargers or power supplies and are not covered by these requirements.

    1.4 These requirements do not cover products that are covered by the Standard for Commercial Audio Equipment,UL 813.

    1.5 Audio or video products intended for use by children are covered by these requirements, but shall also comply with the applicable requirements in the Standard for Electric Toys,UL 696.

    1.6 Video products intended for use at mercantile and banking premises to provide a means of recording holdup attempts or similar activities in the area shall also comply with the applicable requirements in the Standard for Surveillance Camera Units,UL 983.

    1.7 Circuits in audio or video products intended to connect directly to a telecommunication network shall comply with the applicable requirements in the Standard for Information Technology Equipment Safety – Part 1: General Requirements,UL 60950-1.


    1.7 revised June 18, 2010

    1.8 A separately enclosed non-powered loudspeaker that is not intended for connection to a specific audio amplifying source shall comply with the requirements in the Electronic Industries Association (EIA) Interim Standard IS-33, Recommended Loudspeaker Safety Practices – An Industry Guideline, dated May 1987.

    1.9 Deleted August 16, 2001

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
    • UL Foreword
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Undated references
          • 3 Glossary
        • CONSTRUCTION
          • ALL PRODUCTS
          • 4 General
          • 5 Combination Units
          • 6 Double Insulated Products
          • 7 Undercabinet Products
          • 8 Outdoor-Use and Wet-Location Products
          • 9 Multiple-Supply-Circuit-Voltage Products
          • 10 In-Wall Mounted Product
          • 11 Fire
          • 12 Electric Shock
            • 12.1 Product leakage current
            • 12.2 Electric shock during user-servicing
          • 13 Injury to Persons
            • 13.1 General
            • 13.2 Power-operated moving parts
            • 13.3 Carts
          • 14 Product and Accessory Assembly
          • 15 User-Servicing
          • 16 Spacings
            • 16.1 General
            • 16.2 Insulating barrier in lieu of spacings
            • 16.3 Fuse and fuse clip
            • 16.4 Picture tube conductive coating
            • 16.5 Field-wiring terminals
          • 17 Enclosures
            • 17.1 General
            • 17.2 Glass dial window
            • 17.3 Polymeric enclosure
            • 17.4 Special construction option for other than high-voltage products
          • 18 Accessibility of Parts
            • 18.1 Articulated probe
            • 18.2 Protective screens and barriers
            • 18.3 Chassis-mounting bolts
            • 18.4 Coin probe
            • 18.5 Adjustment opening
            • 18.6 Control shaft
          • 19 Top Opening
          • 20 Materials
            • 20.1 General materials
            • 20.2 Small parts
            • 20.3 Exempted parts
            • 20.4 Molded-material insulation
            • 20.5 Insulation materials
            • 20.6 Barrier insulating material
          • 21 Corrosion Protection
          • 22 Metallized Plastic Parts
          • 23 Conductive Internal Mechanical Parts
          • 24 Supply Connections – Cord-Connected Products
            • 24.1 Power-supply cord
            • 24.2 Power-supply-cord length measurement
            • 24.3 Attachment plug
            • 24.4 Cord connector (appliance coupler)
            • 24.5 Cord strain relief
            • 24.6 Power-supply cord exit
            • 24.7 Cord-bearing surface
            • 24.8 Bushing
            • 24.9 Cord push-back relief
          • 25 Supply Connections – Permanently Connected Products
            • 25.1 General
            • 25.2 Separation of circuits
            • 25.3 Wiring terminals
          • 26 Auxiliary Power Connections
          • 27 Polarization
            • 27.1 General
            • 27.2 Polarized product receptacle
          • 28 Grounding, Grounding Impedance, and Continuity
            • 28.1 General
            • 28.2 Basic insulation
            • 28.3 Supplementary insulation
            • 28.4 Reinforced insulation
            • 28.5 Commercial products
            • 28.6 Household or commercial products
            • 28.7 Grounding interconnected products
            • 28.8 Grounding conductor identification and connection
            • 28.9 Grounding-type cord connector (appliance coupler)
            • 28.10 Grounding adapters
            • 28.11 Grounded product receptacle
            • 28.12 Permanently connected products
            • 28.13 Optional grounding
          • 29 Current-Carrying Parts
            • 29.1 General
            • 29.2 Contact material
          • 30 Electrical Connections
            • 30.1 General
            • 30.2 Misalignment of parts
            • 30.3 Wire-wrapped connections
            • 30.4 Wire-wrapped wire
            • 30.5 Wire-wrapped terminals
          • 31 Securement
            • 31.1 Friction-fit electrical connectors
            • 31.2 Component handling
            • 31.3 Evaluation consideration
            • 31.4 Adhesive securement
            • 31.5 Telescoping or rod antennas
            • 31.6 Lead-wire connection terminals
          • 32 Captive Parts
            • 32.1 General
            • 32.2 Captive knobs
          • 33 Interlocks
            • 33.1 General
            • 33.2 User-servicing guard
          • 34 Electronic Components
            • 34.1 Tube interchange and substitution
            • 34.2 Standardized pin/socket arrangement
            • 34.3 Octal-base tube socket
            • 34.4 Picture-tube-base pins
          • 35 Sleeving, Tape, Tubing, Wire Insulation, and Flexible Printed Wiring
            • 35.1 General
            • 35.2 Primary wiring to convenience receptacle
            • 35.3 Small-gauge wire
            • 35.4 Wire handling
            • 35.5 Accessibility of internal wiring
            • 35.6 Low-energy circuit wiring
            • 35.7 Cable and wiring subject to motion
            • 35.8 Wiring subject to handling
            • 35.9 Openings in conductive material
            • 35.10 Remote or interconnecting cable
            • 35.11 Audio amplifier circuit output connections– external speaker connection wire and terminals
          • 36 Devices and Applications
            • 36.1 Mounting
            • 36.2 Securing means
            • 36.3 Unused receptacle
            • 36.4 Receptacle separation
            • 36.5 Receptacle configuration
            • 36.6 Receptacle mounting clearance – conductive surface clearance
            • 36.7 Receptacle mounting clearance – small outlet surface clearance
            • 36.8 Receptacle insertion clearance
            • 36.9 Lampholder construction
            • 36.10 General switch and relay applications
            • 36.11 Receptacle switch or relay
            • 36.12 Double-pole, TV-rated switches controlling two circuits
            • 36.13 Transfer switch
            • 36.14 Solenoids and motors
          • 37 Protective Devices
          • 38 Transformers
            • 38.1 General
            • 38.2 Transformer enclosure
          • 39 Capacitors, Varistors, and Suppressors
            • 39.1 Isolating components
            • 39.2 Across-the-line component
            • 39.3 Electrolytic capacitor
            • 39.4 Capacitor employing liquid or wax dielectric medium
          • 40 Line-Connected or Direct-Connected Series Resistors
          • 41 Lasers
          • 42 Batteries and Battery Circuits
            • 42.1 General
            • 42.2 Battery connections
            • 42.3 Battery terminals
            • 42.4 Automotive or marine battery cord connections
            • 42.5 Battery-circuit fuse
          • 43 Antenna Discharge Path
          • 44 Double Protection
          • 45 Accessories
            • 45.1 Accessory installation procedure
            • 45.2 Tripods
            • 45.3 Accessory jumper plug
            • 45.4 Accessory connection
          • LIQUID CRYSTAL DISPLAY (LCD) VIDEO PRODUCTS
          • 46 General
          • 47 Overtemperature-Protective Device
          • 48 Lamp Compartment
          • 49 Ultraviolet Radiation Interlock
          • HIGH-VOLTAGE PRODUCTS
          • 50 General
            • 50.1 Details
            • 50.2 Degaussing coil insulation
            • 50.3 Picture-tube enclosure opening
            • 50.4 Picture-tube neck protection
            • 50.5 Picture-tube implosion protection
            • 50.6 High-voltage component
            • 50.7 High-voltage part
          • 51 Overload-Protective Device for High-Voltage Products
          • 52 Double Protection for High-Voltage Products
          • VIDEO PRODUCTS INTENDED FOR USE IN HEALTH-CARE FACILITIES
          • 53 General
          • 54 Cords and Plugs
            • 54.1 Attachment plug
            • 54.2 Flexible cord
            • 54.3 Supply cord length
          • 55 Grounding
            • 55.1 Product grounding
            • 55.2 Double insulation
            • 55.3 Accessible conductive parts
            • 55.4 Isolated, accessible conductive parts
            • 55.5 Grounding conductor
          • 56 Separation of Circuits
            • 56.1 Parts touched by patient
          • 57 Pendant Controls
            • 57.1 Pendant-control enclosure
            • 57.2 Pendant-control cord strain relief
            • 57.3 Holders and hooks
          • 58 Switches
          • 59 Transformers
          • 60 Products Having Signaling and Nurse-Call Feature
          • 61 Wheels and Casters
          • 62 Cleaning and Disinfecting
            • 62.1 General
            • 62.2 Entry of spilled materials
        • PERFORMANCE
          • ALL PRODUCTS
          • 63 General
            • 63.1 Details
            • 63.2 Voltmeters
            • 63.3 Leads, connectors, and components
            • 63.4 Cheesecloth indicators
            • 63.5 Supply-circuit voltage and frequency
          • 64 Power Input Test
          • 65 Peak Inrush Current Test
            • 65.1 General
            • 65.2 Test circuit
            • 65.3 Product operating condition
            • 65.4 Test procedure
            • 65.5 Calculation of peak inrush current
            • 65.6 Qualification tests for peak inrush-current measuring circuit
          • 66 Grounding Path Test
          • 67 Product-Leakage and Shock-Current Test
            • 67.1 General
            • 67.2 Product leakage current
            • 67.3 Electric shock at audio output circuit terminations
            • 67.4 Electric shock at an audio output circuit under fault conditions
            • 67.5 Product shock-current
            • 67.6 Stored-energy electric shock
            • 67.7 Component electric shock
            • 67.8 Picture-tube anode lead
          • 68 Temperature Test
            • 68.1 General
            • 68.2 Thermal equilibrium
            • 68.3 Ambient temperatures
            • 68.4 Product test conditions
            • 68.5 Product operating conditions
            • 68.6 Thermocouples
            • 68.7 Winding temperature measurement
          • 69 Maximum Voltage Measurement
            • 69.1 General
            • 69.2 Maximum voltage – V
            • 69.3 Maximum voltage – V
          • 70 Audio Output Power Limitation Measurement Test
          • 71 Dielectric Voltage-Withstand Tests
            • 71.1 General
            • 71.2 Primary circuit when factory dielectric voltage-withstand test potential exceeds 1300 V, 50 or 60 Hz, or is applied for more than 2 seconds
            • 71.3 Primary circuit when factory dielectric voltage-withstand test potential exceeds 2000 V, 50 or 60 Hz, or 2828 V DC, or is applied for more than 4 seconds
            • 71.4 Requirements for AC test equipment
            • 71.5 Requirements for dc test equipment
            • 71.6 Accessible part
            • 71.7 Elevated-voltage system
            • 71.8 High-voltage isolating component
          • 72 Primary Insulation Voltage Test
          • 73 Special Option Tests
            • 73.1 Limited-power determination
            • 73.2 Limited-power fire tests
            • 73.3 Limited power
            • 73.4 Maximum power
          • 74 Abnormal Operation Test Method
            • 74.1 General
            • 74.2 Supply-circuit fuse rating
            • 74.3 Product supporting surface
            • 74.4 Cheesecloth indicator
            • 74.5 User-removable parts
            • 74.6 Fuse indicator
            • 74.7 Polarization
            • 74.8 Inherent overheating protection
            • 74.9 Test duration
            • 74.10 Unacceptable conditions
            • 74.11 Circuit interruption
          • 75 Component Abnormal-Operation Test
          • 76 Receptacle Overload Test
          • 77 Power Supply Tests
            • 77.1 General
            • 77.2 Measurement procedure
            • 77.3 Power measurement tolerance
            • 77.4 Referee procedures
            • 77.5 Additional test details
            • 77.6 Conduction of dielectric voltage-withstand test
            • 77.7 Multiple-pin integrated circuits (ICs)
          • 78 Picture-Tube Filament Short-Circuit Test
          • 79 Unenclosed Transformer Short-Circuit Test
          • 80 Multiple-Voltage Product Test
          • 81 Part Disconnection and Component Handling Arcing
          • 82 Cable Arcing Test
          • 83 Relay Endurance Test
          • 84 Test on Solid-State Switches
            • 84.1 Abnormal operation
            • 84.2 Voltage surge
          • 85 Loudspeakers and Loudspeaker-Crossover Combinations
          • 86 Leakage Current Test After Humidity Conditioning
          • 87 Voltage Surge Test
          • 88 Battery and Battery-Circuit Tests – Electrical
            • 88.1 Battery overcharge
            • 88.2 Battery discharge test
          • 89 Battery Tests – Mechanical
            • 89.1 Battery drop
            • 89.2 Battery oven
            • 89.3 Battery test results
          • 90 Battery Supply Short-Circuit Test
          • 90A Ground Printed-Wiring Board (PWB) Trace Test
          • 91 Strain Relief Test
            • 91.1 Power-supply cord
          • 92 Power-Supply Cord Push-Back Relief Test
          • 93 Interlock Strain Relief Test
          • 94 Separable-Connector Cycling Test
          • 95 Solderless Wire Wrap Connections Test
            • 95.1 General – contact points
            • 95.2 Unwrapping test
            • 95.3 Strip force
          • 96 Injury to Persons Test
            • 96.1 General
            • 96.2 Use of polymeric materials
            • 96.3 Product, cart, or stand temperature stability
            • 96.4 Wheel or caster securement
            • 96.5 Mechanical stability
            • 96.6 Cart or stand loading
            • 96.7 Cart or stand impact
            • 96.8 Handle strength
            • 96.9 Wall-, ceiling-, or rack-mounting securement
            • 96.10 Antenna end-piece securement
            • 96.11 Implosion
          • 97 Sharp Edge Test
          • 98 Strength of Enclosure Tests
            • 98.1 Mechanical tests – general
            • 98.2 Enclosure temperature stability
            • 98.3 Enclosure temperature-stability test method
            • 98.4 Control-button, -knob, and -shaft pull
            • 98.5 Overall enclosure pressure
            • 98.6 Enclosure bottom pressure
            • 98.7 Pressure test method
            • 98.8 Pressure test evaluation for grilles and other nonrigid surfaces
            • 98.9 Enclosure top loading for high-voltage products
            • 98.10 Enclosure bottom loading
            • 98.11 Impact
            • 98.12 Drop test – portable product
            • 98.13 Drop test – portable product power supply and battery charger
            • 98.14 Drop test method
            • 98.15 Drop test – impact surface
            • 98.16 Drop test – results
            • 98.17 Drop test – number of samples to be tested
          • 99 Alternate Enclosure Material Evaluation
          • 100 Adhesive Securement Test
          • 101 Adhesive-Backed Parts Peel Test
          • 102 Tablet Flammability Test
          • 103 Outdoor-Use Wetting Test
          • 104 Undercabinet Product Temperature Test
          • 105 Undercabinet Elevated Ambient Test
          • 106 Undercabinet Increased Moisture Test
          • 107 Undercabinet Mounting Security Test
          • LIQUID CRYSTAL DISPLAY (LCD) VIDEO PRODUCTS
          • 108 Normal Temperature Test
          • 109 Electric Shock Test
            • 109.1 General
            • 109.2 Lamp pin measurements
            • 109.3 Foil measurement (electronic ballasts)
          • 110 Lamp Rupture Test
          • 111 Lamp Particle Ignition Test
            • 111.1 General
            • 111.2 Test method
          • 112 Glass Thermal Shock/Containment Test
            • 112.1 General
            • 112.2 Test method
          • 113 Ozone Test
          • 114 Ultraviolet Radiation Test
          • 115 Abnormal Operation Tests
          • HIGH-VOLTAGE PRODUCTS
          • 116 X-Radiation Test
          • 117 Arcing Test
          • 118 Component-Part Flame Test
          • 119 High-Voltage Short-Circuit Test
          • VIDEO PRODUCTS INTENDED FOR USE IN HEALTH-CARE FACILITIES
          • 120 Leakage Current Test
          • 121 Normal Temperature Test
          • 122 Dielectric-Voltage Withstand Test
          • 123 Burnout Test
          • 124 Cleaning, Disinfecting, and Abuse Tests
            • 124.1 Cleaning test
            • 124.2 Immersion test
            • 124.3 Impact test
            • 124.4 Drop test
          • MANUFACTURING AND PRODUCTION-LINE TESTS AND VERIFICATIONS
          • 125 Tests by the Manufacturer
            • 125.1 Production-line dielectric voltage-withstand test
            • 125.2 AC production-line test
            • 125.3 DC production-line test
            • 125.4 Polarization verification
            • 125.5 Continuity of grounding connection
            • 125.6 Electrical indicating device
            • 125.7 X-Radiation measurement verification
        • MARKINGS
          • ALL PRODUCTS
          • 126 General
          • 127 Identifying and Rating Information
            • 127.1 Product identification
            • 127.2 Electrical rating
            • 127.3 Date of manufacture
            • 127.4 Factory identification
            • 127.5 Accessory identification
            • 127.6 Parallel-slot-type receptacle
            • 127.7 Nonstandard-type receptacle
            • 127.8 Battery-operated products
            • 127.9 External power connections
            • 127.10 Multiple-voltage products
            • 127.11 Supply-circuit voltage selector
            • 127.12 Double insulation product
            • 127.13 Commercial products incorporating grounding
            • 127.14 In-wall mounted product
          • 128 Cautionary and Warning
            • 128.1 Marking type and size
            • 128.2 Service marking location
            • 128.3 Outdoor-use or wet-location applications
            • 128.4 Fuse replacement
            • 128.5 Replacement of attachment plug having overload protection
            • 128.6 Protective device replacement
            • 128.7 Power supply replacement
            • 128.8 Lamp replacement
            • 128.9 Attachment plug overload protection replacement
            • 128.10 Interlock
            • 128.11 Cart or stand
            • 128.12 Audio amplifier output circuit connections marking
          • 129 Graphical Symbols and Supplemental Marking
            • 129.1 No user-serviceable parts compartment warning
            • 129.2 Location priority
            • 129.3 Graphical symbol size and color
            • 129.4 Supplemental marking size and color
            • 129.5 Sizes of outlines and symbols
            • 129.6 Explanation of graphical symbols in the operating instructions
          • 130 Installation, Operation, and Other Instructions
            • 130.1 Product installation and operation
            • 130.2 User-serviceable parts
            • 130.3 Accessory installation
            • 130.4 Assembly of product or accessory cart or stand
            • 130.5 Cable system installation
            • 130.6 In-wall mounting instructions
            • 130.7 Undercabinet products
            • 130.8 Coin/button cell battery compartment
          • 131 Important Safety Instructions
          • 132 Service Information
          • LIQUID CRYSTAL DISPLAY (LCD) VIDEO PRODUCTS
          • 133 Cautionary and Warning
            • 133.1 High-pressure lamp
            • 133.2 Hot surface
            • 133.3 Lamp ultraviolet radiation
            • 133.4 Ultraviolet radiation under servicing conditions
            • 133.5 Interlock
          • 134 Servicing
            • 134.1 Lamp servicing
          • HIGH-VOLTAGE PRODUCTS
          • 135 Cautionary and Warning
            • 135.1 Removable front cover
          • 136 Servicing
            • 136.1 Second anode voltage determination
          • VIDEO PRODUCTS INTENDED FOR USE IN HEALTH-CARE FACILITIES
          • 137 General
            • 137.1 Receptacle
          • 138 Cautionary and Warning
            • 138.1 Ungrounded (isolated) parts
            • 138.2 Pendant control
          • 139 Installation and Operation Instructions
    • SAFETY REQUIREMENTS FOR COIN/BUTTON CELL BATTERIES
    • Appendix A
    • APPENDIX B – A 0.02-OHM SHUNT FOR USE IN THE PEAK INRUSH-CURRENT MEASUREMENT DESCRIBED IN SECTION 65
    • APPENDIX C – VARIABLE RESISTANCE LOAD FOR THE VOLTAGE OUTPUT CHECK DESCRIBED IN SECTION