Relationships of the protection methodEQUIPMENT FORMS OF PROTECTIONCENELECIECNORTH AMERICAN STANDARDSProtection MethodCode of Protec tionProtection PrincipleATEX CATEGORYCENELEC Standard IEC StandardCode of ProtectionPermitted in ZoneUL Stand ardsFlameproofEx dContains the explosion and

Mixing of Codes is Usually Not Permitted, and this equally applies to cable glands or cable connectors.Accepting that Flameproof is not Explosion Proof and vice versa is very important, and whilst some confusion frequently occurs between both the terminology and understanding of the principles invol

Class I Groups ABCD - see Comparison Charts belowClass II Group E - where the atmosphere contains metal dust.Class II Group F - where the atmosphere contains carbon black, coal, or coke dust.Class II Group G - where the atmosphere contains flour, starch, or grain dust.

In North America the standard reference documents for electrical installations are the National Electric Code (NEC) for the USA and the Canadian Electrical Code (CEC) for Canada.Electrical Equipment used in Ordinary, Wet and Hazardous (or Classified) Locations must be 'listed' by an accredited appro

1. Class I Locations are those in which flammable gases or vapors are, or may be, present in the air in quantities sufficient to produce explosive or ignitable mixtures.2. Class I, Division 1 Location Where hazardous concentrations of flammable gases or vapors exist continuously, intermittently, o

European Law - ATEX Directive 94/9/EC ATEX is named after the French "ATmosphère EXplosible" GUIDELINES ON THE APPLICATION OF DIRECTIVE 94/9/EC of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially Explosiv