ANSI UL 62368-1-2014 UL Standard for Safety Audio video information and communication technology equipment C Part 1 Safety requirements (Second Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 62368-1 Audio/video, information and communication technology equipment Part 1: Safety requirementsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER

2、MISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Audio/video, information and communication technology equipment Part 1: Safety requirements, UL 62368-1 Second Edition, Dated December 1, 2014 Summary

3、of Topics This new edition of ANSI/UL 62368-1 is being issued to update requirements to those published in IEC 62368-1, second edition. Technical changes to the IEC Standard have been incorporated into the new edition of the UL Standard. National Differences from the First Edition of UL 62368-1 were

4、 reviewed and updated in the new edition. UL 62368-1 is an adoption of IEC 62368-1, Audio/video, information and communication technology equipment Part 1: Safety requirements (Second Edition, issued February 2014). ). Please note that the national difference document incorporates all of the U.S. na

5、tional differences for UL 62368-1. The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated July 25, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic,

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10、es, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. DECEMBER 1, 2014 UL

11、62368-1 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 1, 2014 UL 62368-1 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group CAN/CSA C22.2

12、 No. 62368-1-14 Second Edition (IEC 62368-1:2014, MOD) Underwriters Laboratories Inc. UL 62368-1 Second Edition Audio/video, information and communication technology equipment Part 1: Safety requirements December 1, 2014 ANSI/UL 62368-1-2014 Approved byUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT

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19、UL 623681 as an American National Standard (ANSI) occurred on December 1, 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 IEC Foreword are also excluded from the ANSI approval of IEC-

20、based standards. Comments or proposals for 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-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m-

21、or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface 13 NATIONAL DIFFERENCES 15 FOREWORD . 16 INTRODUCTION . 19 1 Scope 37 1DV.5.1 Power Distribution Equipment and Sub-Assemblies .39 2 Normative r

22、eferences .41 3 Terms, denitions and abbreviations .49 3.1 Energy source abbreviations 49 3.2 Other abbreviations 50 3.3 Terms and denitions 51 4 General requirements 64 4.1 General 64 4.2 Energy source classications .70 4.3 Protection against energy sources .71 4.4 Safeguards .82 4.5 Explosion .86

23、4.6 Fixing of conductors .87 4.7 Equipment for direct insertion into mains socket-outlets 88 4.8 Products containing lithium coin / button cell batteries .89 4.9 Likelihood of re or shock due to entry of conductive objects .92 5 Electrically-caused injury 93 5.1 General 93 5.2 Classication and limit

24、s of electrical energy sources .93 5.3 Protection against electrical energy sources .101 5.4 Insulation materials and requirements .104 5.5 Components as safeguards .148 5.6 Protective conductor 153 5.7 Prospective touch voltage, touch current and protective conductor current 162 6 Electrically-caus

25、ed re .171 6.1 General .171 6.2 Classication of power sources (PS) and potential ignition sources (PIS) 171 6.3 Safeguards against re under normal operating conditions and abnormal operating conditions .178 6.4 Safeguards against re under single fault conditions 179 6.5 Internal and external wiring

26、195 6.6 Safeguards against re due to the connection of additional equipment 197 6.7DV.1 Safeguards against electrically-caused re due to overvoltage from power line crosses .197 7 Injury caused by hazardous substances .197 7.1 General .197 7.2 Reduction of exposure to hazardous substances .197 7.3 O

27、zone exposure .198 7.4 Use of personal safeguards (PPE) .198 7.5 Use of instructional safeguards and instructions 198 7.6 Batteries and their protection circuits .198 DECEMBER 1, 2014 CAN/CSA C22.2 NO. 62368-1-14 UL 62368-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU

28、TION WITHOUT PERMISSION FROM UL 8 Mechanically-caused injury .198 8.1 General .198 8.2 Mechanical energy source classications 199 8.3 Safeguards against mechanical energy sources 202 8.4 Safeguards against parts with sharp edges and corners 202 8.5 Safeguards against moving parts .203 8.6 Stability

29、of equipment .208 8.7 Equipment mounted to a wall or ceiling .212 8.8 Handle strength 214 8.9 Wheels or casters attachment requirements .215 8.10 Carts, stands, and similar carriers .215 8.11 Mounting means for rack mounted equipment 218 8.12 Telescoping or rod antennas .220 9 Thermal burn injury .2

30、20 9.1 General .220 9.2 Thermal energy source classications 221 9.3 Safeguards against thermal energy sources .223 9.4 Requirements for safeguards 224 10 Radiation .224 10.1 General 224 10.2 Radiation energy source classications 224 10.3 Safeguards against laser radiation 227 10.4 Safeguards against

31、 visible, infra-red, and ultra-violet radiation 227 10.5 Safeguards against x-radiation 229 10.6 Safeguards against acoustic energy sources .230 Annex A (informative) Examples of equipment within the scope of this standard Annex B (normative) Normal operating condition tests, abnormal operating cond

32、ition tests and single fault condition tests B.1 General 236 B.1.1 Introduction 236 B.1.2 Test applicability .236 B.1.3 Type of test 236 B.1.4 Test samples 236 B.1.5 Compliance by inspection of relevant data .237 B.1.6 Temperature measurement conditions 237 B.2 Normal operating conditions 237 B.2.1

33、General .237 B.2.2 Supply frequency .238 B.2.3 Supply voltage .238 B.2.4 Normal operating voltages .238 B.2.5 Input test 239 B.2.6 Operating temperature measurement conditions 240 B.2.7 Battery charging and discharging under normal operating conditions 241 B.3 Simulated abnormal operating conditions

34、 241 B.3.1 General .241 DECEMBER 1, 2014 CAN/CSA C22.2 NO. 62368-1-14 UL 62368-1 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL B.3.2 Covering of ventilation openings 242 B.3.3 DC mains polarity test 243 B.3.4 Setting of voltage selector .

35、243 B.3.5 Maximum load at output terminals 243 B.3.6 Reverse battery polarity .243 B.3.7 Audio amplier abnormal operating conditions .243 B.3.8 Compliance criteria during and after abnormal operating conditions .243 B.4 Simulated single fault conditions 243 B.4.1 General .243 B.4.2 Temperature contr

36、olling device .244 B.4.3 Motor tests 244 B.4.4 Functional insulation 244 B.4.5 Short-circuit and interruption of electrodes in tubes and semiconductors 245 B.4.6 Short-circuit or disconnection of passive components .245 B.4.7 Continuous operation of components .246 B.4.8 Compliance criteria during a

37、nd after single fault conditions 246 B.4.9 Battery charging and discharging under single fault conditions .246 Annex C (normative) UV radiation C.1 Protection of materials in equipment from UV radiation 247 C.1.1 General .247 C.1.2 Requirements 247 C.1.3 Test method and compliance criteria 248 C.2 U

38、V light conditioning test 248 C.2.1 Test apparatus .248 C.2.2 Mounting of test samples 248 C.2.3 Carbon-arc light-exposure test .249 C.2.4 Xenon-arc light-exposure test 249 Annex D (normative) Test generators D.1 Impulse test generators 250 D.2 Antenna interface test generator 251 D.3 Electronic pul

39、se generator .252 Annex E (normative) Test conditions for equipment containing audio ampliers E.1 Audio amplier normal operating conditions 254 E.2 Audio amplier abnormal operating conditions 255 DECEMBER 1, 2014 CAN/CSA C22.2 NO. 62368-1-14 UL 62368-1 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR

40、THER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Annex F (normative) Equipment markings, instructions, and instructional safeguards F.1 General 256 F.2 Letter symbols and graphical symbols .256 F.2.1 Letter symbols .256 F.2.2 Graphical symbols 257 F.2.3 Compliance criteria .257 F.3 Equip

41、ment markings .257 F.3.1 Equipment marking locations .257 F.3.2 Equipment identication markings 258 F.3.3 Equipment rating markings 258 F.3.4 Voltage setting device .261 F.3.5 Markings on terminals and operating devices 261 F.3.6 Equipment markings related to equipment classication .262 F.3.7 Equipm

42、ent IP rating marking .264 F.3.8 External power supply output marking .264 F.3.9 Durability, legibility and permanence of markings .264 F.3.10 Test for the permanence of markings 264 F.4 Instructions .265 F.5 Instructional safeguards 266 Annex G (normative) Components G.1 Switches .271 G.1.1 General

43、 .271 G.1.2 Requirements 271 G.1.3 Test method and compliance criteria .272 G.2 Relays 272 G.2.1 Requirements 272 G.2.2 Overload test 273 G.2.3 Relay controlling connectors supplying power to other equipment 274 G.2.4 Test method and compliance criteria .274 G.3 Protective devices 274 G.3.1 Thermal

44、cut-offs 274 G.3.2 Thermal links 276 G.3.3 PTC thermistors 277 G.3.4 Overcurrent protective devices .277 G.3.5 Safeguard components not mentioned in G.3.1 to G.3.4 278 G.4 Connectors 278 G.4.1 Clearance and creepage distance requirements 278 G.4.2 Mains connectors 279 G.4.3 Connectors other than mai

45、ns connectors 279 G.5 Wound components .279 G.5.1 Wire insulation in wound components .279 G.5.2 Endurance test 280 G.5.3 Transformers 282 G.5.4 Motors 287 G.6 Wire insulation .292 G.6.1 General .292 G.6.2 Solvent-based enamel winding insulation 293 G.7 Mains supply cords .294 G.7.1 General .294 DEC

46、EMBER 1, 2014 CAN/CSA C22.2 NO. 62368-1-14 UL 62368-1 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL G.7.2 Cross sectional area 295 G.7.3 Cord anchorages and strain relief for non-detachable power supply cords .296 G.7.4 Cord entry .297 G.

47、7.5 Non-detachable cord bend protection .298 G.7.6 Supply wiring space 299 G.7ADV.1 General .300 G.7ADV.2 Methods of connection 301 G.7ADV.3 Sizing and ratings 301 G.7ADV.4 Serviceability 302 G.7ADV.5 Length 302 G.8 Varistors .303 G.8.1 General .303 G.8.2 Safeguards against electric shock 304 G.8.3

48、Safeguards against re .305 G.9 Integrated circuit (IC) current limiters 306 G.9.1 Requirements 306 G.9.2 Test program 1 307 G.9.3 Test program 2 308 G.9.4 Test program 3 308 G.9.5 Compliance criteria .309 G.10 Resistors .309 G.10.1 General 309 G.10.2 Resistor test 309 G.10.3 Resistors serving as saf

49、eguards between the mains and an external circuit consisting of a coaxial cable .310 G.11 Capacitors and RC units .310 G.11.1 General 310 G.11.2 Conditioning of capacitors and RC units .311 G.11.3 Rules for selecting capacitors .311 G.11.4 Examples of the application of capacitors 312 G.12 Optocouplers 314 G.13 Printed boards 314 G.13.1 General 314 G.13.2 Uncoated printed boards .314 G.13.3 Coated printed boards .314 G.13.4 Insulation between conductors o