• UL 1971:3ED 2002-11

    Current The latest, up-to-date edition.

    Signaling Devices for the Deaf and Hard of Hearing

    Available format(s):  Hardcopy

    Language(s): 

    Published date:  29-11-2002

    Publisher:  Underwriters Laboratories

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 General
    3 Glossary
    4 Instructions and drawings
    Construction
    5 Enclosures
    6 Covers
    7 Ventilating openings
    8 Corrosion protection
    9 Insulating materials
    10 Mounting of parts
    11 Operating mechanisms
    12 Field-wiring connections - permanently connected
         products
    13 Field-wiring connections - cord connected products
    14 Polarization
    15 Current-carrying parts
    16 Internal wiring
    17 Interconnecting cords and cables
    18 External circuit connections
    19 Printed-circuit boards
    20 Motor overcurrent protection
    21 Grounding for products connected to the branch
         circuit
    22 Class 2 power units
    23 Spacings
    24 Servicing protection
    Performance
    25 General
    26 Normal operation and electrical supervision tests
    27 Signal strength and format test
    28 Electrical measurements
    29 Variable voltage operation test
    30 Component temperature test
    31 Variable ambient tests
    32 Overload test
    33 Endurance test
    34 Transient tests
    35 Vibration test
    36 Electric shock current test
    37 Leakage current test
    38 Dielectric voltage-withstand test
    39 Component failure test
    40 Abnormal operation and burnout test
    41 Drop test
    42 Impact test
    43 Crush test
    44 Strain relief test
    45 Indoor corrosion test
    46 Special terminal assemblies tests
    Installation and operating instructions
    47 General
    Markings
    48 General
    49 Permanence of marking
    Appendix
    A Standards for components

    Abstract - (Show below) - (Hide below)

    This revision to ANSI/UL 1971 includes Revision to the Signal Strength and Format Test to Address LED Strobes.

    Scope - (Show below) - (Hide below)

    1.1 These requirements cover emergency-signaling devices for the hearing impaired.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Product Note NEW CHILD REV 6 2018 IS NOW ADDED.
    Publisher Underwriters Laboratories
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

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    UL 864:10ED 2014-12 Standard for Control Units and Accessories for Fire Alarm Systems
    NEMA SB 2:2016 Training Manual on Fire Alarm Systems
    UL 1638:5ED 2016-01 Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories
    UL 2572:2ED 2016-03 Mass Notification Systems
    UL 60079-0:6ED 2013-07 Explosive Atmospheres - Part 0: Equipment - General Requirements

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    UL 1577:5ED 2014-04 Optical Isolators
    UL 496:14ED 2017-09 Lampholders
    UL 1638:5ED 2016-01 Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories
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