1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 826Household Electric ClocksUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
2、TION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Household Electric Clocks, UL 826Eleventh Edition, Dated November 29, 2007Revisions: This Standard contains revisions through and including March 31,
3、 2009.Summary of TopicsThis revision of UL 826 corrects the Test Potential for Condition B in Table 27.1.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 n
4、oteindicating the date of publication or the date on which the changed requirement becomes effective.The revisions are substantially in accordance with ULs Proposal(s) on this subject dated January 30,2009.The revisions dated March 31, 2009 include a reprinted title page (page1) for this Standard.As
5、 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 the procedures to be followedto retain the approved text of this ANSI/UL Standard.The UL Foreword is no longer located wi
6、thin 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 ULStandardsInfoNet at: http:/ master for this Standard at ULs Northbrook Office is the official document insofar as it relates t
7、o 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 Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distributiondiskette for a Stand
8、ard-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 thoseStandards shall remain the sole and exclusive property of UL.All rights reserved. No part of this publication may be
9、reproduced, stored in a retrieval system, ortransmitted 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 t
10、he most recently adopted revisions.UL provides 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.MARCH 31, 2009 UL 826 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
11、REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULIn no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even
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21、r 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 text for requirements that have been revised and that have a future effective dateare located after the Standard, and are p
22、receded by a SUPERSEDED REQUIREMENTS notice.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 prod
23、uct be judged under the current requirements. 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 Listing, Recognition, and Follow-Up Services afterthe effective date, and understanding
24、 of this should be signified in writing.Copyright 2009 Underwriters Laboratories Inc.MARCH 31, 2009 UL 826tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis Standard consists of pages dated as shown in the following checklist:Page Date1Ma
25、rch 31, 20092-39 .November 29, 200740-40B March 31, 200941-42 November 29, 2007A1-A2November 29, 2007MARCH 31, 2009 UL 826 tr3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 31, 2009 UL 826tr4No Text on This PageUL COPYRIGHTED MATERIAL N
26、OT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 29, 2007(Title Page Reprinted: March 31, 2009)1UL 826Standard for Household Electric ClocksFirst Edition October, 1966Second Edition October, 1968Third Edition January, 1974Fourth Edition July, 1974Fifth Edition
27、 October, 1979Sixth Edition January, 1981Seventh Edition November, 1985Eighth Edition July, 1990Ninth Edition June, 1995Tenth Edition August, 2000Eleventh EditionNovember 29, 2007This ANSI/UL Standard for Safety consists of the Eleventh Edition includingrevisions through March 31, 2009.The most rece
28、nt designation of ANSI/UL 826 as an American National Standard(ANSI) occurred on March 31, 2009. ANSI approval for a standard does notinclude the Cover Page, Transmittal Pages, Title Page, or effective dateinformation.Comments or proposals for revisions on any part of the Standard may besubmitted to
29、 UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative Standards Development System (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and all
30、copyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive property of UL.COPYRIGHT 2009 UNDERWRITERS LABORATORIES INC.ANSI/UL 826-2009UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 29, 2007HOUSEH
31、OLD ELECTRIC CLOCKS - UL 8262No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 General 52.1 Components .52.2 Units of measurement .62.3 Undated references .63 Glossary .6CONSTRUCTION4 Frame and
32、 Enclosure 64.1 General .64.2 Accessibility of live parts 94.3 Mounting means 124.4 Servicing .125 Corrosion Resistance .136 Mechanical Assembly 137 Supply Connections Cord-Connected Clocks 137.1 Cords and plugs .137.2 Grounding 167.3 Strain relief .167.4 Bushings .178 Supply Connections Permanently
33、 Connected Clocks .178.1 General 178.2 Grounding 188.3 Terminals .188.4 Leads 199 Live Parts .2010 Insulating Material 2011 Internal Wiring 2012 Coil Windings 2113 Spacings 2214 Secondary Circuits 2414.1 General .2414.2 Connections to frame .2514.3 Separation of circuits .25PERFORMANCE15 Leakage Cur
34、rent Test .2516 Leakage Current Test Following Humidity Conditioning 2817 Current Input Test 2818 Temperature Test .2819 Dielectric Voltage-Withstand Test .3219.1 General .3219.2 Primary circuits 3219.3 Secondary circuits 3220 Transformer Abnormal Operation Test .3320.1 General .33NOVEMBER 29, 2007
35、HOUSEHOLD ELECTRIC CLOCKS - UL 826 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL20.2 15-day abnormal operation 3321 Secondary Circuit Component Failure, Abnormal Operation Test .3522 Stability Test of Floor-Standing Clocks 3623 Enclosure A
36、buse (Drop) Test .3624 Mounting Means Test .3625 Strain Relief Test .3726 Impact Test 37MANUFACTURING AND PRODUCTION TESTS27 Production-Line Dielectric Voltage-Withstand Test 4028 Grounding Continuity Test .4128.1 Continuity of grounding connection .4128.2 Electrical indicating device .42RATINGS29 G
37、eneral 42MARKINGS30 General 42APPENDIX AStandards for ComponentsA1NOVEMBER 29, 2007HOUSEHOLD ELECTRIC CLOCKS - UL 8264UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover electrically operated househo
38、ld clocks having an input rating of not morethan 30 watts and 250 volts to be used in ordinary indoor locations in accordance with the NationalElectrical Code, NFPA 70.1.2 These requirements do not cover clocks intended primarily for industrial or commercial installations,clocks that form part of a
39、master clock system, outdoor clocks, time stamps, job card recorders, timers,and similar time-indicating and -recording appliances, nor do they cover illuminated clocks intended foruse as portable electric lamps or for other illuminating purposes.1.3 A product that contains features, characteristics
40、, components, materials, or systems new or differentfrom those covered by the requirements in this standard, and that involves a risk of fire or of electric shockor injury to persons shall be evaluated using appropriate additional component and end-productrequirements to maintain the level of safety
41、 as originally anticipated by the intent of this standard. Aproduct whose features, characteristics, components, materials, or systems conflict with specificrequirements or provisions of this standard does not comply with this standard. Revision of requirementsshall be proposed and adopted in confor
42、mance with the methods employed for development, revision, andimplementation of this standard.2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply withthe requirements for that component. See Appendix A for a list of standards cove
43、ring components usedin the products covered by this standard.2.1.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this standard, orb) Is superseded by a requireme
44、nt in this standard.2.1.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.1.4 Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are intended for use only under limited conditio
45、ns, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.NOVEMBER 29, 2007 HOUSEHOLD ELECTRIC CLOCKS - UL 826 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.2 Units of measureme
46、nt2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.2.2.2 Unless otherwise indicated, all voltage and current values mentioned in this standard areroot-mean-square (rms).2.3 Undated references2.3.1 Any undated reference to a
47、code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.3 Glossary3.1 For the purpose of this standard the following definitions apply.3.2 FIELD WIRING TERMINAL Any terminal to which a supply or other wire may be
48、 connected byan installer in the field, unless the wire is provided as part of the unit and a connector, soldering lug,soldered loop, crimped eyelet, pressure terminal, or other means for making the connection is factoryassembled to the wire.3.3 PRINTED WIRING ASSEMBLY A printed wiring board on whic
49、h mechanical and electrical partsare mounted.3.4 PRINTED WIRING BOARD The finished combination of a pattern of conductive paths on, in, orboth on and in (multilayer) a sheet of insulating material.3.5 SAFETY CIRCUIT Any primary or secondary circuit that is relied upon to reduce the risk ofdamage or injury to persons (for example, an interlock circuit).3.6 SECONDARY CIRCUIT A circuit supplied from a secondary winding of an isolating transformer.CONSTRUCTION4 Frame a
