目录简介    |     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	
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