2015BS EN 60079-7:2015 Explosive atmospheres. Equipment protection by increased safety "e"
2007BS EN 60079-7:2007 Explosive atmospheres - Equipment protection by increased safety "e"
2003BS EN 60079-7:2003 Electrical apparatus for explosive gas atmospheres - Increased safety "e"
2000BS EN 50019:2000 Electrical apparatus for potentially explosive atmospheres - Increased safety "e"
1980BS 5000-15:1980 Rotating electrical machines of particular types or for particular applications - Machines with type of protection 'e' (increased safety)