1、Information Technology Equipment Safety Part1: General RequirementsAmendment 1:2011 toNational Standard of CanadaCAN/CSA-C22.2 No. 60950-1-07(IEC 60950-1:2005, MOD)NOT FOR RESALE.PUBLICATION NON DESTINE LA REVENTE.CSA Standards Update ServiceAmendment 1:2011 toCAN/CSA-C22.2 No. 60950-1-07December 20
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3、pdates to this publication is 2418577.If you require assistance, please e-mail techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at csagroup.org/legal to find out how we protect your personal information.Information Technology Equipment Safety Part 1:General RequirementsMarch 27, 2
4、007(Title Page Reprinted: December 19, 2011)This national standard is based on publication IEC 60950-1, Second Edition(2005), including Amendment 1 (2009).Canadian Standards AssociationAmendment 1:2011 (MOD) toNational Standard of CanadaCAN/CSA-C22.2 No. 60950-1-07Second Edition(IEC 60950-1: 2005, M
5、OD)Underwriters Laboratories Inc.UL 60950-1Second EditionANSI/UL 60950-1-2011Commitment for AmendmentsThis standard is issued jointly by the Canadian Standards Association (CSA) andUnderwriters Laboratories Inc. (UL). Comments or proposals for revisions on anypart of the standard may be submitted to
6、 CSA or UL at any time. Revisions to thisstandard will be made only after processing according to the standardsdevelopment procedures of CSA and UL. CSA and UL will issue revisions to thisstandard by means of a new edition or revised or additional pages bearing theirdate of issue._CSA Standards are
7、subject to periodic review, and suggestions for theirimprovement will be referred to the appropriate committee. To submit a proposalfor change to CSA Standards, please send the following information toinquirescsa.ca and include Proposal for change in the subject line: Standarddesignation (number); r
8、elevant clause, table, and/or figure number; wording of theproposed change; and rationale for the change.To purchase CSA Standards and related publications, visit CSAs Online Store atwww.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-4044._ULs Standards for Safety are copyrighted by UL. Neit
9、her a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Second Edition includingrevisions t
10、hrough December 19, 2011. The most recent designation of ANSI/UL60950-1 as an American National Standard (ANSI) occurred on December 19,2011. ANSI approval for a standard does not include the Cover Page, TransmittalPages, Title Page (front and back), or the Preface. The National Difference Pageand I
11、EC Foreword are also excluded from the ANSI approval of IEC-basedstandards.Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative Standards Development System (CSDS)at http:/.
12、 To purchase UL Standards, visit Comm 2000 athttp:/m- or call toll-free1-888-853-3503.ISBN 1-55436-415-9Copyright 2007Canadian Standards AssociationAll rights reserved. No part of thispublication may be reproduced in anyform whatsoever without the priorpermission of the publisher.Copyright 2011Under
13、writers Laboratories Inc.CONTENTSPREFACE 8BFOREWORD 12INTRODUCTION .150 Principles of safety 150.1 General principles of safety 150.2 Hazards .160.3 Materials and components .201 General 211.1 Scope .211.2 Definition 22A1.3 General requirements 38A1.4 General conditions for tests 401.5 Components .4
14、61.6 Power interface .541.7 Markings and instructions 562 Protection from hazards 652.1 Protection from electric shock and energy hazards 652.2 SELV circuits .762.3 TNV circuits 792.4 Limited current circuits 852.5 Limited power sources .86A2.6 Provisions for earthing and bonding .882.7 Overcurrent
15、and earth fault protection in primary circuits .982.8 Safety interlocks .1012.9 Electrical insulation 1052.10 Clearances, creepage distances and distances through insulation 1123 Wiring, connections and supply 1453.1 General 1453.2 Connection to a mains supply .1513.3 Wiring terminals for connection
16、 of external conductors .1593.4 Disconnection from the mains supply 1643.5 Interconnection of equipment 1674 Physical requirements 1684.1 Stability .1684.2 Mechanical strength 1694.3 Design and construction 1784.4 Protection against hazardous moving parts .1904.5 Thermal requirements 190C4.6 Opening
17、s in enclosures 1944.7 Resistance to fir 2055 Electrical requirements and simulated abnormal conditions 2155.1 Touch current and protective conductor current .2155.2 Electric strength .2275.3 Abnormal operating and fault conditions 2316 Connection to telecommunication networks 2366.1 Protection of t
18、elecommunication network service persons, and users of otherequipment connected to the network, from hazards in the equipment 236DECEMBER 19, 2011 CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-1 3DE6.2 Protection of equipment users from overvoltages on telecommunicationnetworks 2396.3 Protection of the tele
19、communication wiring system from overheating .2426.4 Protection against overvoltage from power line crosses 2437 Connection to cable distribution systems 2467.1 General 2467.2 Protection of cable distribution system service persons, and users of otherequipment connected to the system, from hazardous
20、 voltages in theequipment 2467.3 Protection of equipment users from overvoltages on the cable distributionsystem .2477.4 Insulation between primary circuits and cable distribution systems .247Annex A (normative) Tests for resistance to heat and fireA.1 Flammability test for fire enclosures of movabl
21、e equipment having a total massexceeding 18 kg and of stationary equipment (see 4.7.3.2) .250A.2 Flammability test for fire enclosures of movable equipment having a total massnot exceeding 18 kg, and for material and components located inside fireenclosures (see 4.7.3.2 and 4.7.3.4) .251A.3 Hot flam
22、ing oil test (see 4.6.2) 253Annex B (normative) Motor tests under abnormal conditions (see 4.7.2.2 and 5.3.2)B.1 General requirements 254B.2 Test conditions 254B.3 Maximum temperatures 255B.4 Running overload test 256B.5 Locked-rotor overload test 257B.6 Running overload test for d.c. motors in seco
23、ndary circuits .258B.7 Locked-rotor overload test for d.c. motors in secondary circuits .259B.8 Test for motors with capacitors 260B.9 Test for three-phase motors 260B.10 Test for series motors .260Annex C (normative) Transformers (see 1.5.4 and 5.3.3)C.1 Overload test 261C.2 Insulation .263Annex D
24、(normative) Measuring instruments for touch-current tests (see 5.1.4)D.1 Measuring instrument .265D.2 Alternative measuring instrument .266MARCH 27, 2007CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-14D2Annex E (normative) Temperature rise of a winding (see 1.4.13)Annex F (normative) Measurement of clearanc
25、es and creepage distances (see 2.10 andAnnex G)Annex G (normative) Alternative method for determining minimum clearancesG.1 Clearances 279G.1.1 General 279G.1.2 Summary of the procedure for determining minimum clearances 279G.2 Determination of mains transient voltage .280G.2.1 AC mains supply 280G.
26、2.2 Earthed d.c. mains supplies .281G.2.3 Unearthed d.c. mains supplies 281G.2.4 Battery operation 281G.3 Determination of telecommunication network transient voltage .281G.4 Determination of required withstand voltage 282G.4.1 Mains transients and internal repetitive peaks .282G.4.2 Transients from
27、 telecommunication networks .283G.4.3 Combination of transients .283G.4.4 Transients from cable distribution systems 283G.5 Measurement of transient voltage levels 284G.6 Determination of minimum clearances .284AAnnex H (normative) Ionizing radiation (see 4.3.13)Annex J (normative) Table of electroc
28、hemical potentials (see 2.6.5.6)Annex K (normative) Thermal controls (see 1.5.3 and 5.3.8)K.1 Making and breaking capacity .291K.2 Thermostat reliability 291K.3 Thermostat endurance test 292K.4 Temperature limiter endurance .292K.5 Thermal cut-out reliability 292K.6 Stability of operation 292Annex L
29、 (normative) Normal load conditions for some types of electrical businessequipment (see 1.2.2.1 and 4.5.2)L.1 Typewriters 293L.2 Adding machines and cash registers 293L.3 Erasers .293L.4 Pencil sharpeners 293L.5 Duplicators and copy machines 294L.6 Motor-operated files 294L.7 Other business equipmen
30、t .295MARCH 27, 2007 CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-1 5Annex M (normative) Criteria for telephone ringing and other signals(see 2.3.1)M.1 Introduction .296M.2 Method A .296M.3 Method B .300M.3.1 Ringing signal .300M.3.2 Tripping device and monitoring voltage .301M.4 Other telecommunication si
31、gnals .303Annex N (normative) Impulse test generators(see 1.5.7.2, 1.5.7.3, 2.10.3.9, 6.2.2.1, 7.4.2,7.4.3 and Clause G.5)N.1 ITU-T impulse test generators .305N.2 IEC 60065 impulse test generator 306Annex P (normative) Normative referencesP.1 UL and CSA Component Requirements (mandatory) .313P.2 UL
32、 and CSA Component Requirements (alternative) .318Annex Q (normative) Voltage dependent resistors (VDRs)(see 1.5.9.1)Annex R (informative) Examples of requirements for quality control programmesR.1 Minimum separation distances for unpopulated coated printed boards (see2.10.6.2) 326R.2 Reduced cleara
33、nces (see 2.10.3) 327Annex S (informative) Procedure for impulse testing(see 6.2.2.3)S.1 Test equipment 329S.2 Test procedure .329S.3 Examples of waveforms during impulse testing 329Annex T (informative) Guidance on protection against ingress of water(see 1.1.2)Annex U (normative) Insulated winding
34、wires for use without interleaved insulation(see2.10.5.4)U.1 Wire construction 334U.2 Type tests .334U.2.1 Electric strength .334U.2.2 Flexibility and adherence 334AU.2.3 Heat shock .335U.2.4 Retention of electric strength after bending .336U.3 Test during manufacture 336DECEMBER 19, 2011CAN/CSA-C22
35、.2 NO. 60950-1-07 UL 60950-16DED2DCDCU.3.1 Routine testing 336U.3.2 Sampling tests 337Annex V (normative) A.C. power distribution systems(see 1.6.1)V.1 Introduction 338V.2 TN power distribution systems .339V.3 TT power distribution systems .342V.4 IT power distribution systems 344Annex W (informativ
36、e) Summation of touch currentsW.1 Touch current from electronic circuits 346W.1.1 Floating circuits .346W.1.2 Earthed circuits .347W.2 Interconnection of several equipments .348W.2.1 Isolation 349W.2.2 Common return, isolated from earth .350W.2.3 Common return, connected to protective earth 350Annex
37、 X (informative) Maximum heating effect in transformer tests(see Clause C.1)X.1 Determination of maximum input current 351X.2 Overload test procedure 352Annex Y (normative) Ultraviolet light conditioning test(see 4.3.13.3)Y.1 Test apparatus .353Y.2 Mounting of test samples 353Y.3 Carbon-arc light-ex
38、posure apparatus .353Y.4 Xenon-arc light-exposure apparatus 353Annex Z (informative) Overvoltage categories (see 2.10.3.2 and Clause G.2)Annex AA (normative) Mandrel test(see 2.10.5.8)Annex BB (informative) Changes in the second editionBB.1 Numbering changes table 359BB.2 Changes to this edition 360
39、DECEMBER 19, 2011 CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-1 7Annex CC (normative) Evaluation of integrated circuit (IC) current limitersCC.1 Integrated circuit (IC) current limiters 363CC.2 Test program 1 363CC.3 Test program 2 364Annex DD (normative) Requirements for the mounting means of rack-mounte
40、d equipmentDD.1 General .364ADD.2 Mechanical strength test, variable N 364ADD.3 Mechanical strength test, 250 N, including end stops .364BDD.4 Compliance 364BAnnex EE (normative) Household and home/office document/media shreddersEE.1 General .364CEE.2 Markings and instructions 364CEE.3 Inadvertent r
41、eactivation 364DEE.4 Disconnection of power to hazardous moving parts .364DEE.5 Protection against hazardous moving parts 364DBibliographyAnnex NAA (normative) Markings and instructionsAnnex NAB(informative) D.C. powered equipment and centralized d.c. power systems(see1.6.1.2)NAB.1 System descriptio
42、ns .381Annex NAC (normative) Power line crosses(see 6.4)NAC.1 Equipment evaluation 384NAC.2 Test set-up .384NAC.2.1 Equipment .384NAC.2.2 Wiring connections 385NAC.2.3 Wiring simulator 385NAC.3 Test conditions 386NAC.3.1 General conditions 386NAC.3.2 Special conditions .387NAC.3.3 Tests 388NAC.4 Com
43、pliance .391DECEMBER 19, 2011CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-18D2D2D2Annex NAD(normative) Acoustic testsNAD.1 General 392NAD.1.2 Definitions .392NAD.2 Acoustic pressure limiting 393NAD.3 Short-duration impulses 394NAD.3.1 Method 1 (recommended method) .396ANAD.3.2 Method 2 (alternate method) 3
44、96ANAD.4 Long-duration disturbances 396ANAD.4.1 Method 1 (recommended method) .396DNAD.4.2 Method 2 (alternate method) 396DAnnex NAE(informative) U.S. and Canadian regulatory requirementsAnnex NAF DeletedINDEXDECEMBER 19, 2011 CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-1 8AD2D1PREFACEThis is the common C
45、SA and UL Standard for Information Technology Equipment Safety Part 1: General Requirements. It is the second edition of CAN/CSA-C22.2 No. 60950-1 and thesecond edition of UL 60950-1. This standard is based on IEC 60950-1, second edition, asrevised by Amendment 1.Previous editions of this Standard w
46、ere designated CAN/CSA-C22.2 No. 950/UL 1950 andCAN/CSA-C22.2 No. 60950/UL 60950, third edition. This standard CAN/CSA-C22.2 No.60950-1/UL 60950-1, second edition, replaces the previous standard CAN/CSA-C22.2 No.60950-1/UL 60950-1, first edition. The standard number and edition number have been alig
47、nedto correspond with the equivalent IEC 60950-1 standard.This common standard was prepared by the Canadian Standards Association (CSA) andUnderwriters Laboratories Inc. (UL). The efforts and support of representatives of leadingindustry companies and organizations are gratefully acknowledged.This S
48、tandard is considered suitable for use for conformity assessment within the stated scopeof the Standard.This Standard was reviewed by the CSA Subcommittee on Safety of Electronic Equipmentwithin the Field of Audio/Video, Information, and Communication Technology, under thejurisdiction of the CSA Tec
49、hnical Committee on Consumer and Commercial Products and theCSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formallyapproved by the CSA Technical Committee.This Standard has been approved as a National Standard of Canada by the Standards Councilof Canada.This Standard has been approved by the American National Standards Institute (ANS
