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Contents 1 Scope 2 Normative References 3 Terms and Definitions 4 Equipment Grouping and Temperature Classification 5 Flameproof Joints 6 Cemented Joints 7 Operating Rods 8 Supplementary Requirements for Shafts and Bearings 9 Light-transmitting Parts 10 Breathing and Draining Devices Which Form Part of a Flameproof Enclosure 11 Fasteners, Associated Holes and Blanking Elements 12 Materials and Mechanical Strength of Enclosures—Materials Inside the Enclosures 13 Entries for Flameproof Enclosures 14 Verification and Tests 15 Type Tests 16 Routine Tests 17 Switchgear for Group 1 18 Lampholders and Lamp Caps 19 Non-metallic Enclosures and Non-metallic Parts of Enclosures 20 Marking Appendix A (Normative) Additional Requirements for Crimped Ribbon Elements and Multiple Screen Elements of Breathing and Draining Devices Appendix B (Normative) Additional Requirements for Elements, with Non-measurable Paths, of Breathing and Draining Devices Appendix C (Normative) Additional Requirements for Flameproof Entry Devices Appendix D (Normative) Empty Flameproof Enclosures as Ex Components Appendix E (Normative) Cells and Batteries Used in Flameproof “d” Enclosures Appendix F (Normative) Supplementary Provisions for Electrical Equipment of Group Appendix G (Informative) Mechanical Properties for Screws and Nuts Appendix H (Informative) Introduction of an Alternative Risk Assessment Method Encompassing “Equipment Protection Levels” for Ex Equipment |