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IEC 60079-10-Electrical apparatus for explosive gas atmospheres-Part 10-Classification of hazardous areas
Publisher: IEC

Posted by A.K.Hait on 12 July, 2007 - 10:42 pm The reason for sealing between zone-1 and Zone-2 is not only to stop an explosion from propagating between locations but also to prevent the migration of gas or vapour through the conduit. IEC 60079-10-Electrical apparatus for explosive gas atmospheres-Part 10-Classification of hazardous areas. The British Standard BS 5345 Part 2 will become obsolete and replaced by BS/EN/IEC 60079-10. Zone 0 describes areas in which there is a flammable gas atmosphere present for more than 1000 hours per annum ('continuously'); Zone 1 covers areas where a flammable gas atmosphere is present intermittently for more than 10 hours pa but less . IEC 60079- ELECTRICAL APPARATUS FOR EXPLOSIVE GAS ATMOSPHERES Part 3 Ed. The requirements for equipment to be certified as Ex d or Ex e are set out in various Standards - IEC 60079-1 for Ex d Flameproof equipment, and IEC 60079-7 for Ex e Increased Safety equipment (and documents based on these). 1.0/1963 Spark test apparatus for intrinsically safe circuits (Withdrawn) Part 10 Ed. Table 1 - IEC 79 classification of hazardous area zones. IEC 79 classification of hazardous area zones. IEC 60079-10-Electrical apparatus for explosive gas atmospheres-Part 10-Classification. Table 1 shows the IEC 79-10 zone classification used in Europe and most other parts of the world. The factors relevant to the classifications of a hazardous area are the nature of the gases or dust present in the potentially explosive atmosphere.