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Contents 1 Scope 2 Normative References 3 Terms and Definitions 4 Grouping and Classification of Intrinsically Safe Apparatus and Associated Apparatus 5 Levels of Protection and Ignition Compliance Requirements of Electrical Apparatus 6 Apparatus Construction 7 Components on Which Intrinsic Safety Depends 8 Infallible Components, Infallible Assemblies of Components and Infallible Connections on Which Intrinsic Safety Depends 9 Diode Safety Barriers 10 Type Verification and Tests 11 Routine Verifications and Tests 12 Marking 13 Documentation Appendix A (Normative) Assessment of Intrinsically Safe Circuits Appendix B (Normative) Spark Test Apparatus for Intrinsically Safe Circuits Appendix C (Informative) Measurement of Creepage Distances, Clearances and Separation Distances Through Casting Compound and Through Solid Insulation Appendix D (Informative) Encapsulation Appendix E (Informative) Transient Energy Test Appendix F (Normative) Alternative Separation Distances for Assembled Printed Circuit Boards and Separation of Components |