IEC 60079-1A:1975 ED2

Electrical apparatus for explosive gas atmospheres - Part 1: Construction and verification test of flameproof enclosures of electrical apparatus - First supplement: Appendix D: Method of test for ascertainment of maximum experimental safe gap

Publication date:   Jan 1, 1975

General information

99.60 Withdrawal effective   Jul 5, 2002


TC 31 Equipment for explosive atmospheres

International Standard

29.260.20   Electrical apparatus for explosive atmospheres



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Gives a method of measuring the maximum experimental safe gaps for gas or vapour-air mixtures under normal conditions of temperature and pressure to permit the selection of the appropriate group of flameproof enclosures. Values of the MESG (g0) min. the difference (g100) min., - (g0) min., the most dangerous concentration, and the test temperature are tabulated.

Life cycle


IEC 60079-1A:1975 ED2
99.60 Withdrawal effective
Jul 5, 2002