1、Information Technology Equipment Safety Part 1: General RequirementsAmendment 2:2014 (MOD) toNational Standard of CanadaCAN/CSA-C22.2 No. 60950-1-07(IEC 60950-1:2005, MOD) IEC 2013. CSA Group 2014. All rights reserved. Unauthorized reproduction is strictly prohibited.Standards Update ServiceAmendmen
2、t 2:2014 toCAN/CSA-C22.2 No. 60950-1-07October 2014Title: Information Technology Equipment Safety Part 1: General RequirementsTo register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you will need to register for updates to
3、 this publication is 2423261.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups 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
4、, 2007(Title Page Reprinted: October 14, 2014)This national standard is based on publication IEC 60950-1, Second Edition(2005), including Amendment 1 (2009) and Amendment 2 (2013).CSA GroupAmendment 2:2014 (MOD) toNational Standard of CanadaCAN/CSA-C22.2 No. 60950-1-07Second Edition(IEC 60950-1: 200
5、5, MOD)Approved byUnderwriters Laboratories Inc.UL 60950-1Second EditionANSI/UL 60950-1-2014Commitment for AmendmentsThis standard is issued jointly by the Canadian Standards Association (operatingas “CSA Group”) and Underwriters Laboratories Inc. (UL). Comments orproposals for revisions on any part
6、 of the standard may be submitted to CSAGroup or UL at anytime. Revisions to this standard will be made only afterprocessing according to the standards development procedures of CSA Groupand UL. CSA Group and UL will issue revisions to this standard by means of anew edition or revised or additional
7、pages bearing their date of issue._All rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.This Standard is subject to periodic review, and suggestions for its improvement will be referred to theappropriate committee. To
8、submit a proposal for change, please send the following information toinquirescsagroup.org and include Proposal for change in the subject line: Standard designation(number); relevant clause, table, and/or figure number; wording of the proposed change; and rationalefor the change.To purchase CSA Grou
9、p Standards and related publications, visit CSA Groups Online Store atshop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044._ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights
10、, ownerships, and rightsregarding those Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Second Edition including revisions through October14, 2014. The most recent designation of ANSI/UL 60950-1 as an American National Standard (ANSI)occu
11、rred on October 14, 2014. ANSI approval for a standard does not include the Cover Page,Transmittal Pages, Title Page (front and back), or the Preface. The National Difference Page and IECForeword are also excluded from the ANSI approval of IEC-based standards.Comments or proposals for revisions on a
12、ny part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at http:/To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503ISBN 1-55436-415-9Copyright 2007
13、CSA GroupAll rights reserved. No part of thispublication may be reproduced in anyform whatsoever without the priorpermission of the publisher.Copyright 2014Underwriters Laboratories Inc.CONTENTSPREFACE 8FOREWORD 11INTRODUCTION .140 Principles of safety 140.1 General principles of safety 140.2 Hazard
14、s .160.3 Materials and components .201 General 211.1 Scope .211.2 Definitions 22B1.3 General requirements 38A1.4 General conditions for tests 401.5 Components .461.6 Power interface .541.7 Markings and instructions 562 Protection from hazards 652.1 Protection from electric shock and energy hazards 6
15、52.2 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 and earth fault protection in primary circuits .982.8 Safety interlocks .1012.9 Electrical insulation 1052.10 Clearances, creepage distance
16、s and distances through insulation 1123 Wiring, connections and supply 1463.1 General 1463.2 Connection to a mains supply .1513.3 Wiring terminals for connection of external conductors .1593.4 Disconnection from the mains supply 1643.5 Interconnection of equipment 1674 Physical requirements 1684.1 S
17、tability .1684.2 Mechanical strength 1694.3 Design and construction 1764.4 Protection against hazardous moving parts .1904.5 Thermal requirements 190C4.6 Openings in enclosures 1944.7 Resistance to fire 2055 Electrical requirements and simulated abnormal conditions 2155.1 Touch current and protectiv
18、e conductor current .2155.2 Electric strength .2275.3 Abnormal operating and fault conditions 2316 Connection to telecommunication networks 2366.1 Protection of telecommunication network service persons, and users of otherequipment connected to the network, from hazards in the equipment 236OCTOBER 1
19、4, 2014 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 telecommunication wiring system from overheating .2426.4 Protection against overvoltage from power line crosses 2437 Connection to cable distri
20、bution systems 2467.1 General 2467.2 Protection of cable distribution system service persons, and users of otherequipment connected to the system, from hazardous voltages in theequipment 2467.3 Protection of equipment users from overvoltages on the cable distributionsystem .2477.4 Insulation between
21、 primary circuits and cable distribution systems .247Annex A (normative) Tests for resistance to heat and fireA.1 Flammability test for fire enclosures of movable equipment having a total massexceeding 18 kg and of stationary equipment (see 4.7.3.2) .250A.2 Flammability test for fire enclosures of m
22、ovable 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 flaming 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.
23、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 secondary circuits .258B.7 Locked-rotor overload test for d.c. motors in secondary circuits .259B.8 Test for motors with capacitors 260B.9 Test
24、 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 (normative) Measuring instruments for touch-current tests (see 5.1.4)D.1 Measuring instrument .265D.2 Alternative measuring instrument .266
25、MARCH 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 clearances and creepage distances (see 2.10 andAnnex G)Annex G (normative) Alternative method for determining minimum clearancesG.1 Clearances 279G
26、.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.2.2 Earthed d.c. mains supplies .281G.2.3 Unearthed d.c. mains supplies 281G.2.4 Battery operation 281G.3 Determination of telecommunicatio
27、n network transient voltage .281G.4 Determination of required withstand voltage 282G.4.1 Mains transients and internal repetitive peaks .282G.4.2 Transients from telecommunication networks .283G.4.3 Combination of transients .283G.4.4 Transients from cable distribution systems 283G.5 Measurement of
28、transient voltage levels 284G.6 Determination of minimum clearances .284AAnnex H (normative) Ionizing radiation (see 4.3.13)Annex J (normative) Table of electrochemical 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 Thermost
29、at reliability 291K.3 Thermostat endurance test 292K.4 Temperature limiter endurance .292K.5 Thermal cut-out reliability 292K.6 Stability of operation 292Annex L (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 mac
30、hines 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 equipment .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.
31、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 signals .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
32、 test generators .305N.2 IEC 60065 impulse test generator 306Annex P (normative) Normative referencesP.1 UL and CSA Component Requirements (mandatory) .313P.2 UL and CSA Component Requirements (alternative) .317Annex Q (normative) Voltage dependent resistors (VDRs)(see 1.5.9.1)Annex R (informative)
33、Examples of requirements for quality control programmesR.1 Minimum separation distances for unpopulated coated printed boards (see2.10.6.2) .326AR.2 Reduced clearances (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 Exa
34、mples of waveforms during impulse testing 329Annex T (informative) Guidance on protection against ingress of water(see 1.1.2)Annex U (normative) Insulated winding wires for use without interleaved insulation(see2.10.5.4)U.1 General .334U.2 Type tests .334U.2.1 General 334U.2.2 Electric strength .334
35、U.2.3 Flexibility and adherence 334BU.2.4 Heat shock 334BU.2.5 Retention of electric strength after bending .335OCTOBER 14, 2014CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-16DED2DCDCU.3 Testing during manufacture .335U.3.1 General 335U.3.2 Routine test .336U.3.3 Sampling test .336Annex V (normative) A.C.
36、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 (informative) Summation of touch currentsW.1 Touch current from electronic circuits 346W.1.1 Floating circuits .346W.1.2 E
37、arthed 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 X (informative) Maximum heating effect in transformer tests(see Clause C.1)X.1 Determination of maximum input
38、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-exposure apparatus .353Y.4 Xenon-arc light-exposure apparatus 353Annex Z (informative) Overvoltage categories (se
39、e 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 358ABB.2 Changes to this edition .358BOCTOBER 14, 2014 CAN/CSA-C22.2 NO. 60950-1-07 UL 60950-1 7Annex CC (normative) Evaluation of integrated circ
40、uit (IC) current limitersCC.1 Integrated circuit (IC) current limiters .362ACC.2 Test program 1 .362ACC.3 Test program 2 .362BCC.4 Test program 3 363CC.5 Compliance .364Annex DD (normative) Requirements for the mounting means of rack-mounted equipmentDD.1 General .364ADD.2 Mechanical strength test,
41、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 reactivation 364DEE.4 Disconnection of power to hazardous mov
42、ing 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 descriptions .381Annex NAC (normative) Power line crosses(see 6.4)NAC.
43、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 Compliance .391OCTOBER 14, 2014CAN/CSA-C22.2 NO. 60950-1-07 UL
44、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) 396ANAD.4 Long-duration disturbances 396ANAD.4.1 Method 1 (rec
45、ommended 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 harmonized CSA Group and UL standard for Information Technology Equip
46、ment Safety Part 1: General Requirements. It is the second edition of CAN/CSA-C22.2 No. 60950-1and the second edition of UL 60950-1. This harmonized standard has been jointly revised onOctober 14, 2014. For this purpose, CSA Group and UL are issuing revision pages datedOctober 14, 2014.This harmoniz
47、ed standard is based on IEC Publication 60950-1, second edition, InformationTechnology Equipment Safety Part 1: General Requirements issued 12-2005, as revised byCorrigendum 1 (issued 12-2006), Amendment 1 (issued 12-2009), Amendment 2 (issued5-2013) and Corrigendum 2 (issued 8-2013). IEC publicatio
48、n 60950-1 is copyrighted by the IEC.Previous editions of this standard were 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
49、-1, first edition. The standard number and edition number have been alignedto correspond with the equivalent IEC 60950-1 standard.This harmonized standard was prepared by CSA Group and Underwriters Laboratories Inc.(UL). The efforts and support of representatives of leading industry companies andorganizations are gratefully acknowledged.This standard is considered
