IECSTD - Version 3 - UL Standards

1 2 IEC 62368-1:20xx IEC 20xx CONTENTS. WARNING: This document is for use by the experts only to see the differences made. It is NOT. for providing comments. Only comments given in relation to document 108/750(A)/DC will be accepted. Therfore, line numbers have been removed in this document. CONTENTS .. 2. FOREWORD .. 20. INTRODUCTION .. 23. 0 Principles of this product safety standard .. 23. Objective .. 23. Persons .. 23. General .. 23. Ordinary person .. 23. Instructed person .. 23. Skilled person .. 23. Model for pain and injury .. 24. Energy sources .. 24. Safeguards .. 25. General .. 25. Equipment safeguard .. 26. Installation safeguard .. 26. Personal 27. Behavioural safeguards .. 27. Safeguards during ordinary or instructed person service conditions .. 28. Equipment safeguards during skilled person service conditions .. 28. Examples of safeguard characteristics .. 28. Electrically-caused pain or injury (electric shock) .. 29. Models for electrically-caused pain or injury.

2 29. Models for protection against electrically-caused pain or injury .. 30. Electrically-caused fire .. 31. Models for electrically-caused fire .. 31. Models for protection against electrically-caused fire .. 31. Injury caused by hazardous substances .. 32. Mechanically-caused injury .. 32. Thermally-caused injury (skin burn) .. 33. Models for thermally-caused injury .. 33. Models for protection against thermally-caused pain or injury .. 34. Radiation-caused injury .. 35. 1 Scope .. 36. 2 Normative references .. 37. 3 Terms, definitions and abbreviated terms .. 44. Energy source abbreviations .. 44. Other abbreviations .. 45. Terms and definitions .. 46. Circuit terms .. 49. Enclosure terms .. 49. Equipment terms .. 50. IEC 62368-1:20xx IEC 20xx 3 . Flammability terms .. 51. Electrical 53. Miscellaneous .. 53. Operating and fault conditions .. 56. Persons .. 57. Potential ignition sources .. 58. Ratings .. 58. Safeguards .. 59. Spacings .. 61. Temperature controls.

3 61. Voltages and currents .. 61. Classes of equipment with respect to protection from electric shock .. 62. Chemical terms .. 63. Batteries .. 63. FIW terms .. 64. Sound exposure .. 64. 4 General requirements .. 65. General .. 65. Application of requirements and acceptance of materials, components and subassemblies .. 65. Use of components .. 66. Equipment design and construction .. 66. Equipment installation .. 66. Constructions and components not specifically covered .. 67. Orientation during transport and use .. 67. Choice of criteria .. 67. Liquids and liquid filled components (LFC), including self-contained LFC s and modular LFC s .. 67. Electrical measuring instruments .. 68. Temperature measurements .. 68. Steady state conditions .. 68. Hierarchy of safeguards .. 68. Examples mentioned in this document .. 68. Tests on parts or samples separate from the end-product .. 69. Markings and instructions .. 69. Energy source classifications .. 69. Class 1 energy source.

4 69. Class 2 energy source .. 69. Class 3 energy source .. 69. Energy source classification by declaration .. 69. Protection against energy sources .. 70. General .. 70. Safeguards for protection of an ordinary person .. 70. Safeguards for protection of an instructed person .. 71. Safeguards for protection of a skilled person .. 72. Safeguards in a restricted access area .. 73. Safeguards .. 73. Equivalent materials or components .. 73. Composition of a safeguard .. 73. 4 IEC 62368-1:20xx IEC 20xx Safeguard robustness .. 74. Displacement of a safeguard by an insulating liquid .. 76. Safety interlocks .. 76. Explosion .. 77. General .. 77. Requirements .. 77. Fixing of conductors .. 77. Requirements .. 77. Compliance criteria .. 77. Equipment for direct insertion into mains socket-outlets .. 78. General .. 78. Requirements .. 78. Compliance criteria .. 78. Equipment containing coin / button cell batteries .. 78. General .. 78. Instructional safeguard .. 78.

5 Construction .. 79. Tests .. 79. Compliance criteria .. 80. Likelihood of fire or shock due to entry of conductive objects .. 81. Components requirements .. 81. Disconnect device .. 81. Switches and relays .. 81. Power supply cords .. 81. 5 Electrically-caused injury .. 81. General .. 81. Classification and limits of electrical energy sources .. 81. Electrical energy source classifications .. 81. Electrical energy source ES1 and ES2 limits .. 82. Protection against electrical energy sources .. 87. General .. 87. Accessibility to electrical energy sources and safeguards .. 87. Insulation materials and requirements .. 90. General .. 90. Clearances .. 95. Creepage distances .. 106. Solid insulation .. 110. Antenna terminal 119. Insulation of internal wire as a part of a supplementary safeguard .. 120. Tests for semiconductor components and for cemented joints .. 120. Humidity conditioning .. 120. Electric strength test .. 121. Safeguards against transient voltages from external circuits.

6 124. Separation between external circuits and earth .. 126. Insulating liquid .. 127. Components as safeguards .. 128. General .. 128. Capacitors and RC units .. 128. IEC 62368-1:20xx IEC 20xx 5 . Transformers .. 130. Optocouplers .. 130. Relays .. 130. Resistors .. 130. SPDs .. 131. Insulation between the mains and an external circuit consisting of a coaxial cable .. 131. Safeguards for socket-outlets in outdoor equipment .. 132. Protective conductor .. 132. General .. 132. Requirements for protective conductors .. 132. Requirements for protective earthing conductors .. 133. Requirements for protective bonding conductors .. 134. Terminals for protective conductors .. 136. Resistance of the protective bonding system .. 138. Reliable connection of a protective earthing conductor .. 139. Functional earthing .. 139. Prospective touch voltage, touch current and protective conductor 140. General .. 140. Measuring devices and networks .. 140. Equipment set-up, supply connections and earth connections.

7 140. Unearthed accessible parts .. 140. Earthed accessible conductive parts .. 141. Requirements when touch current exceeds ES2 limits .. 141. Prospective touch voltage and touch current associated with external circuits .. 142. Summation of touch currents from external circuits .. 144. Backfeed safeguard in battery backed up supplies .. 145. 6 Electrically-caused fire .. 145. General .. 145. Classification of power sources (PS) and potential ignition sources (PIS) .. 146. General .. 146. Power source circuit classifications .. 146. Classification of potential ignition sources .. 149. Safeguards against fire under normal operating conditions and abnormal operating conditions .. 150. Requirements .. 150. Compliance criteria .. 151. Safeguards against fire under single fault 151. General .. 151. Reduction of the likelihood of ignition under single fault conditions in PS1 circuits .. 151. Reduction of the likelihood of ignition under single fault conditions in PS2 circuits and PS3 circuits.

8 151. Control of fire spread in PS1 circuits .. 153. Control of fire spread in PS2 circuits .. 153. Control of fire spread in a PS3 circuit .. 154. Separation of combustible materials from a PIS .. 155. Fire enclosures and fire barriers .. 157. 6 IEC 62368-1:20xx IEC 20xx Flammability of an insulating liquid .. 165. Internal and external wiring .. 165. General requirements .. 165. Requirements for interconnection to building wiring.. 165. Internal wiring for socket-outlets .. 166. Safeguards against fire due to the connection of additional 166. 7 Injury caused by hazardous 166. General .. 166. Reduction of exposure to hazardous 166. Ozone exposure .. 167. Use of personal safeguards or personal protective equipment (PPE) .. 167. Use of instructional safeguards and instructions .. 167. Batteries and their protection circuits .. 167. 8 Mechanically-caused injury .. 167. General .. 167. Mechanical energy source classifications .. 167. General classification.

9 167. MS1 .. 169. MS2 .. 170. MS3 .. 170. Safeguards against mechanical energy sources .. 170. Safeguards against parts with sharp edges and corners .. 170. Requirements .. 170. Compliance criteria .. 171. Safeguards against moving parts .. 171. Requirements .. 171. Instructional safeguard requirements .. 172. Compliance criteria .. 172. Special categories of equipment containing moving parts .. 172. High pressure lamps .. 177. Stability of equipment .. 178. Requirements .. 178. Static stability .. 180. Relocation stability .. 181. Glass slide test .. 182. Horizontal force test and compliance 182. Equipment mounted to a wall, ceiling or other structure .. 182. Requirements .. 182. Test methods .. 182. Compliance criteria .. 184. Handle strength .. 184. General .. 184. Test method .. 184. Wheels or casters attachment requirements .. 185. General .. 185. Test method .. 185. Carts, stands, and similar carriers .. 185. General .. 185. IEC 62368-1:20xx IEC 20xx 7.

10 Marking and instructions .. 185. Cart, stand or carrier loading test and compliance criteria .. 186. Cart, stand or carrier impact 187. Mechanical stability .. 187. Thermoplastic temperature stability .. 187. Mounting means for slide-rail mounted equipment (SRME) .. 187. General .. 187. Requirements .. 188. Mechanical strength test .. 188. Compliance criteria .. 189. Telescoping or rod antennas .. 189. 9 Thermal burn 190. General .. 190. Thermal energy source classifications .. 190. TS1 .. 190. TS2 .. 190. TS3 .. 190. Touch temperature limits .. 190. Requirements .. 190. Test method and compliance criteria .. 190. Safeguards against thermal energy sources .. 193. Requirements for safeguards .. 193. Equipment safeguard .. 193. Instructional safeguard .. 193. Requirements for wireless power transmitters .. 194. General .. 194. Specification of the foreign objects .. 194. Test method and compliance criteria .. 196. 10 Radiation .. 197. General .. 197. Radiation energy source classifications.