1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 745-4-3Particular Requirements forBattery-Operated Grinders,Polishers, and Disk-TypeSandersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FRO
2、M ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Particular Requirements for Battery-Operated Grinders, Polishers, andDisk-Type Sanders
3、, UL 745-4-3Second Edition, Dated November 16, 2007Summary of TopicsThis new Second edition was issued to clarify the UL effective date statement shown on thePreface page and to make other administrative changes. The technical content of the Firstedition has been reproduced verbatim in this edition;
4、 the text of the standard has not beenchanged.As noted in the Commitment for Amendments statement located on the back side of the titlepage, UL and CSA are committed to updating this IEC-based binational standard jointly.However, this Second edition dated November 16, 2007 will not be issued by CSA
5、since itaddresses UL only administrative changes.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 ULStandardsInfoNet at: http:/ master for
6、 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 Standards for Safety are copyright
7、ed 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 thoseStandards shall remain the so
8、le and exclusive property of UL.All rights reserved. No part of this publication may be 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 ar
9、e issued from time to time. A UL Standard for Safety is currentonly if it incorporates the 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
10、any purpose.In 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 if UL or an authorized UL representative
11、has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.NOVEMBER 16, 2007 UL 745-4-3 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PE
12、RMISSION FROM ULUL 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 versions of its Standards only if
13、 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 like of both its printed and
14、 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) resulting from any error or dev
15、iation 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-server or the permanent stor
16、agedevice 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 may be stored ona single LAN
17、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 a Standard,conducting a word
18、 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 in thecomputer/software/printe
19、r 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 beingviewed for their own fa
20、ir 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 preface. The priortext for requirements that have been revised and that
21、 have a future effective date are located after theStandard, and are preceded 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 e
22、ffective date, unlessthe applicant specifically requests that the product 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, Recogniz
23、ed and Follow-Up Services afterthe effective date, and understanding of this should be signified in writing.Copyright 2007 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1-12 .November 16, 2007NOVEMBER 16, 2007 UL 745-4-3tr2UL COPYRIG
24、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCanadian Standards AssociationCAN/CSA-C22.2 No. 745-4-3First EditionUnderwriters Laboratories Inc.UL 745-4-3Second EditionParticular Requirements for Battery-Operated Grinders, Polishers,and Disk-Type Sand
25、ersNovember 16, 2007UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCommitment for AmendmentsThis Standard is issued jointly by Canadian Standards Association and Underwriters LaboratoriesIncorporated. Amendments to this Standard will be made
26、only after processing according to theStandards writing procedures by both Canadian Standards Association and Underwriters LaboratoriesIncorporated.ISBN 1-55397-485-9 2004Canadian Standards AssociationAll rights reserved. No part of this publication may be reproduced in any form whatsoever without t
27、heprior permission of the publisher.Copyright 1995, 2007 Underwriters Laboratories Inc.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSPreface .51 Scope .62 Definitions 63 General requirement 64 General notes on tests 65 Rating .66 Res
28、erved 67 Marking 68 Protection against electric shock 79 Reserved 710 Reserved .711 Heating .712 Reserved .713 Reserved .714 Reserved .715 Electric strength .716 Reserved .717 Abnormal operation 718. Mechanical hazards .719 Mechanical strength 820 Construction .821 Internal wiring .822 Components 82
29、3 Supply connection and external flexible cables and cords .824 Reserved .825 Reserved .826 Reserved .827 Clearances 828 Resistance to heat, fire and tracking .829 Resistance to rusting .830 Tests by manufacturers .931 Instructions 9NOVEMBER 16, 2007 CAN/CSA-C22.2 NO. 745-4-3 UL 745-4-3 3UL COPYRIGH
30、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAppendix A Thermal cut-outs and overload releasesAppendix B ReservedAppendix C ReservedAppendix D ReservedAppendix E Reference standardsAppendix F Attachments and accessoriesAppendix G Sequence of testsAppe
31、ndix H TranslationsH1 Translations .10H1.1 Markings 10H1.2 Instructions 10NOVEMBER 16, 2007CAN/CSA-C22.2 NO. 745-4-3 UL 745-4-34UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis is the common CSA and UL Standard for portable battery-
32、operated grinders, polishers and disk-typesanders. It is the first edition of CSA Standard C22.2 No. 745-4-3 , Safety of portable battery-operatedtools Part 4: Particular requirements for grinders, polishers and disk-type sanders and UL 745-4-3 Safetyof portable battery-operated tools Part 4: Partic
33、ular requirements for grinders, polishers and disk-typesanders. It is written in SI (metric) units.This Standard was prepared by Canadian Standards Association and Underwriters Laboratories Inc. Thiscommon CSA and UL Standard is based on IEC Publication 745-2-3 (1984) Part 2: Particularrequirements
34、for grinders, polishers and disk-type sanders.Where a particular clause of the general requirements Standard is not mentioned in this Standard, theclause applies as far as is reasonable. Where this edition states addition, modification,orreplacement,the relevant requirement, test specification, or e
35、xplanatory matter in the general requirements Standardshould be adapted accordingly.If the functions of a tool are covered by different particular Standards, the relevant particular requirementsStandard is applied to each function separately, so far as is reasonable. If applicable, the influence of
36、onefunction on the other is taken into account.This Standard was reviewed by the CSA Subcommittee on Portable Electric Tools of the TechnicalCommittee on Consumer and Commercial Products under the jurisdiction of the Standards SteeringCommittee on the Canadian Electrical Code, Part II, and was forma
37、lly approved by these Committees.This Standard was processed and reviewed in accordance with the method of development, revision andimplementation of UL Standards for safety.This Standard has been approved by the Standards Council of Canada as a National Standard of Canadaand has been approved by th
38、e American National Standards Institute (ANSI) as an American NationalStandard.March 23, 1995UL Effective DateThe effective date for UL 745-4-3 is the date of publication.Revisions of this Standard will be made by issuing revised or additional pages bearing their date of issue.A UL Standard is curre
39、nt only if it incorporates the most recently adopted revisions, all of which areitemized on the transmittal notice that accompanies the latest set of revised requirements. Comments orproposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals shouldbe submitted
40、via a Proposal Request in ULs On-Line Collaborative Standards Development System(CSDS) at http:/.CSA Effective DateThe effective date for CSA will be announced through a CSA Certification Notice.Note: Although the intended primary application of this Standard is stated in its Scope, it is important
41、to note that itremains the responsibility of the users of the Standard to judge its suitability for their particular purpose.NOVEMBER 16, 2007 CAN/CSA-C22.2 NO. 745-4-3 UL 745-4-3 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1 ScopeThis cl
42、ause of Part 3 is applicable, except as follows:1.1 Replacement:The term tool is replaced with grinders, polishers, and disk-type sanders.2 DefinitionsThis clause of Part 3 is applicable, except as follows:Additional definition:2.2.101 Disk-type sander denotes an abrading tool in which the abrasive
43、material is fixed to the facialsurface of a rotating disk.3 General requirementThis clause of Part 3 is applicable.4 General notes on testsThis clause of Part 3 is applicable.5 RatingThis clause of Part 3 is applicable.6 Reserved7 MarkingThis clause of Part 1 is applicable, except as follows:7.1 Add
44、ition:Grinders, polishers and disk-type sanders shall be marked with: indication of direction of rotation;The direction of rotation of the wheel or disk shall be indicated by an arrow, raised or sunk, or by any other means noless visible and indelible. rated diameter of the grinding disk or polishin
45、g wheel; rated grinding disk or polishing wheel thickness only for peripheral grinders and peripheralpolishers.NOVEMBER 16, 2007CAN/CSA-C22.2 NO. 745-4-3 UL 745-4-36UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL WARNING To reduce the risk of
46、 injury, always use proper guards when grinding and weareye protection. Use only accessories rated at least _/min.The accessory speed marking shall be equal to or greater than the no load speed marked on the tools nameplate.This warning applies only to grinders or to sanders which the manufacturer r
47、ecommends be converted to grinders.If this cautionary marking is included as part of the cautionary marking required in Part 3, Sub-clause 7.1, the words Warning Toreduce the risk of injury need not be repeated.Grinders with a 50.8 mm or less rated wheel size do not require the warning about the use
48、 of the guard.8 Protection against electric shockThis clause of Part 3 is not applicable.9 Reserved10 Reserved11 HeatingThis clause of Part 3 is applicable.12 Reserved13 Reserved14 Reserved15 Electric strengthThis clause of Part 3 is applicable.16 Reserved17 Abnormal operationThis clause of Part 3 i
49、s applicable.18. Mechanical hazardsThis clause of Part 3 is applicable, except as follows:Additional sub-clauses:18.101 Grinders having a rated grinding wheel diameter exceeding 50.8 mm shall be provided with anon-detachable guard having sufficient mechanical strength to contain any parts of the wheel that may bethrown out in the event of breakage. The opening in the guard shall not be larger than necessary for thecorrect working of the tool.NOVEMBER 16, 2007 CA
