1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1971Signaling Devices for theHearing ImpairedUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
2、 FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Signaling Devices for the Hearing Impaired, UL 1971Third Edition, Dated November 29, 2002Revisions: This Standard contains revisions
3、 through and including October 15, 2008.SUMMARY OF TOPICSRevision to ratings information in installation literatureUL Standards for Safety are developed and maintained in the Standard Generalized Markup Language(SGML). SGML - an international standard (ISO 8879-1986) - is a descriptive markup langua
4、ge thatdescribes a documents structure and purpose, rather than its physical appearance on a page. Due toformatting differences resulting from the use of ULs new electronic publishing system, please note thatadditional pages (on which no requirements have been changed) may be included in revision pa
5、ges dueto relocation of existing text and reformatting of the Standard.Text that has been changed in any manner is marked with a vertical line in the margin. Changes inrequirements are marked with a vertical line in the margin and are followed by an effective date noteindicating the date of publicat
6、ion or the date on which the changed requirement becomes effective.The revisions dated October 15, 2008 are substantially in accordance with ULs Bulletin(s) on this subjectdated May 30, 2008.The following table lists the future effective dates with the corresponding item.Future Effective Date Refere
7、ncesOctober 15, 2010 48.5The revisions dated October 15, 2008 include a reprinted title page (page1) for this Standard.As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard.Attention is directed to the note on the title page of this Standard outlining
8、the procedures to be followedto retain the approved text of this ANSI/UL Standard.The UL Foreword is no longer located within the UL Standard. For information concerning the use andapplication of the requirements contained in this Standard, the current version of the UL Foreword islocated on ULStand
9、ardsInfoNet at: http:/ master for this Standard at ULs Northbrook Office is the official document insofar as it relates to aUL service and the compliance of a product with respect to the requirements for that product and service,or if there are questions regarding the accuracy of this Standard.ULs S
10、tandards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distributiondiskette for a Standard-on-Diskette and the file for the Standard on the distribution diskette should bealtered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding t
11、hoseStandards shall remain the sole and exclusive property of UL.OCTOBER 15, 2008 UL 1971 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortr
12、ansmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is currentonly if it incorporates the most recently adopted revisions.UL provides
13、 this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of pr
14、ofits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis S
15、tandard, regardless of the form of the claim.UL will attempt to answer support requests concerning electronic versions of its Standards. However, thissupport service is offered on a reasonable efforts basis only, and UL may not be able to resolve everysupport request. UL supports the electronic vers
16、ions of its Standards only if they are used under theconditions and operating systems for which it is intended. ULs support policies may change fromtime-to-time without notification.UL reserves the right to change the format, presentation, file types and formats, delivery methods andformats, and the
17、 like of both its printed and electronic Standards without prior notice.Purchasers of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and holdUL harmless from and against any loss, expense, liability, damage, claim, or judgement (includingreasonable attorneys fees) re
18、sulting from any error or deviation introduced while purchaser is storing anelectronic Standard on the purchasers computer system.If a single-user version electronic Standard was purchased, one copy of this Standard may be stored onthe hard disk of a single personal computer, or on a single LAN file
19、-server or the permanent storagedevice of a multiple-user computer in such a manner that this Standard may only be accessed by one userat a time and for which there is no possibility of multiple concurrent access.If a multiple-user version electronic Standard was purchased, one copy of the Standard
20、may be stored ona single LAN file-server, or on the permanent storage device of a multiple-user computer, or on an Intranetserver. The number of concurrent users shall not exceed the number of users authorized.Electronic Standards are intended for on-line use, such as for viewing the requirements of
21、 a Standard,conducting a word search, and the like. Only one copy of the Standard may be printed from eachsingle-user version of an electronic Standard. Only one copy of the Standard may be printed for eachauthorized user of a multiple-user version of an electronic Standard. Because of differences i
22、n thecomputer/software/printer setup used by UL and those of electronic Standards purchasers, the printedcopy obtained by a purchaser may not look exactly like the on-line screen view or the printed Standard.An employee of an organization purchasing a UL Standard can make a copy of the page or pages
23、 beingviewed for their own fair and/or practical internal use.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior
24、 text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.OCTOBER 15, 2008 UL 1971tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL
25、New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective date, unlessthe applicant specifically requests that the product be judged under the current requirements
26、. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Recognition and Follow-Up Services after theeffective date, and understanding of this should be signified in writing.Copyright 2008
27、 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1October 15, 20082July 20, 20053.May3,20044October 15, 20085-6.May3,20047-23 .November 29, 200224-25 October 15, 200826.November 29, 200227.October 15, 200828-35 November 29, 200236.Octo
28、ber 15, 200837-45 November 29, 200246May3,200447-56 November 29, 200257.October 15, 200858-76 November 29, 200277-80 October 15, 2008A1-A2October 15, 2008OCTOBER 15, 2008 UL 1971 tr3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 15, 2
29、008 UL 1971tr4No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 29, 2002(Title Page Reprinted: October 15, 2008)1UL 1971Standard for Signaling Devices for the Hearing ImpairedFirst Edition June, 1992Second Edition Oc
30、tober, 1995Third EditionNovember 29, 2002The most recent designation of ANSI/UL 1971 as an American National Standard(ANSI) occurred on October 15, 2008. The ANSI approval for this standard doesnot include Appendix A or effective date information.This ANSI/UL Standard for Safety, which consists of t
31、he Third Edition withrevisions through October 15, 2008, is under continuous maintenance, wherebyeach revision is ANSI approved upon publication.An effective date included as a note immediately following certain requirementsis one established by Underwriters Laboratories Inc. and is not part of the
32、ANSIstandard.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised r
33、equirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Standards Development System (CSDS) at http:/.COPYRIGHT 2008 UNDERWRITERS LABORATORIES INC.ANSI/UL 1971-2008
34、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 20, 2005SIGNALING DEVICES FOR THE HEARING IMPAIRED - UL 19712No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONT
35、ENTSINTRODUCTION1 Scope .72 General 72.1 Components .72.2 Units of measurement .82.3 Undated references .83 Glossary .84 Instructions and Drawings 9CONSTRUCTION5 Enclosures 105.1 General 105.2 Cast metal 105.3 Sheet metal 115.4 Plastic .135.5 Wood 146 Covers .166.1 General 166.2 Transparent covers 1
36、67 Ventilating Openings .178 Corrosion Protection .219 Insulating Materials 2110 Mounting of Parts .2211 Operating Mechanisms 2312 Field-Wiring Connections Permanently-Connected Products 2312.1 General .2312.2 Field-wiring terminal connections .2412.3 Field-wiring terminals and leads 2412.4 Identifi
37、ed terminal and leads .2513 Field-Wiring Connections Cord-Connected Products .2613.1 General .2613.2 Cords and plugs .2613.3 Strain relief 2813.4 Bushings 2814 Polarization 2915 Current-Carrying Parts 2916 Internal Wiring 2916.1 General .2916.2 Splices and connections 3017 Interconnecting Cords and
38、Cables 3118 External Circuit Connections .3118.1 Separation of circuits .3118.2 Terminal and connectors 3219 Printed-Circuit Boards .3220 Motor Overcurrent Protection .3321 Grounding for Products Connected to the Branch Circuit 33MAY 3, 2004 SIGNALING DEVICES FOR THE HEARING IMPAIRED - UL 1971 3UL C
39、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL22 Class 2 Power Units 3523 Spacings 3524 Servicing Protection .3724.1 General .3724.2 Electric shock 37PERFORMANCE25 General 3826 Normal Operation and Electrical Supervision Tests .4127 Signal Stren
40、gth and Format Test .4127.1 General .4127.2 Light output measurements 4727.3 Optional black box test procedure 4827.4 Quadrant vector alignment 5128 Synchronization of Light Output Test 5329 Electrical Measurements .5330 Variable Voltage Operation Test 5531 Component Temperature Test 5532 Environmen
41、tal Tests 5933 Overload Test 5933.1 Signaling devices 5933.2 Signaling systems 6034 Endurance Test 6034.1 Signaling devices 6034.2 Signaling systems 6035 Transient Tests .6135.1 General .6135.2 Supply line transients .6135.3 Internally induced transients .6135.4 Signal circuit transients .6236 Vibra
42、tion Test 6337 Electric Shock Current Test 6338 Leakage Current Test .6739 Dielectric Voltage-Withstand Test .7140 Component Failure Test .7241 Abnormal Operation and Burnout Test 7342 Drop Test 7443 Impact Test 7444 Crush Test .7545 Strain Relief Test .7546 Indoor Corrosion Test .7647 Special Termi
43、nal Assemblies Tests .76INSTALLATION AND OPERATING INSTRUCTIONS48 General 77MARKINGS49 General 7750 Permanence of Marking .79OCTOBER 15, 2008SIGNALING DEVICES FOR THE HEARING IMPAIRED - UL 19714UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULA
44、PPENDIX AStandards for ComponentsA1MAY 3, 2004 SIGNALING DEVICES FOR THE HEARING IMPAIRED - UL 1971 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis page intentionally left blank.MAY 3, 2004SIGNALING DEVICES FOR THE HEARING IMPAIRED - UL
45、19716UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover emergency-signaling devices for the hearing impaired. The devices and/orsystems covered by this standard are suitable for use in a controlled
46、environment, or in an uncontrolledenvironment as indicated in the product marking. These devices are to be used in accordance with therequirements of the National Fire Alarm Code, NFPA 72.1.1 revised November 29, 20021.2 A signaling device as covered by these requirements consists of a unit assembly
47、 of electrical partshaving provision for the connection of power supply circuits routed through the equipment by a prescribedscheme of circuiting. Also included are circuits that extend to separate devices by which additional unitsare actuated for signals. An installation wiring diagram attached to
48、the product, or referenced in theproduct marking, indicates the devices and circuits that are acceptable for connection to the signalingdevice.1.3 These requirements are to evaluate visible signaling appliances for public mode operation. Theseappliances are designed to alert occupants or inhabitants
49、 within the protected area. These requirementsdo not cover lights intended for private mode fire alarm signaling, lights intended for non-fire-alarmsignaling applications, manual boxes, automatic fire detectors, or other initiating devices; nor do theycover bells, registers, or other indicating devices not provided as part of the product.1.3 revised November 29, 20021.4 Deleted November 29, 20022 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by
