EQUIPMENT GROUPS
The construction of explosion protected electrical equipment intended for use in potentially flammable atmospheres (hazardous areas) is defined clearly in two separate categories to suit the nature of the hazardous area application. The two categories recognised under both the CENELEC (European) Normatives and the IEC Standards are stated as being equipment groups or apparatus groups, and are defined as follows :-
Apparatus Group I - Electrical equipment for mining applications
Apparatus Group II - Electrical equipment for surface industry hazardous areas, other than mining applications
