Hochiki IFD-E(EXD) - Manual (Page 3)

Hochiki Europe (UK) Ltd 3
2-3-0-810/ISS3/OCT11
Classification of Hazardous Areas
EN 60079-0 (formally EN50014) states that electrical apparatus for potentially explosive atmospheres is
divided into:
 Group I: Electrical apparatus for mines susceptible to fire damp;
 Group II: Electrical apparatus for places with a potentially explosive atmosphere, other than
mines susceptible to fire damp.
These flame detectors are designed to meet the requirements of Group II apparatus. For the type of
protection “d” Flameproof, Group II is subdivided into Equipment Categories, Type of Explosive
Atmosphere (Table 1), Type of Protection Code (Table 2), Temperature Class (Table 3) and Gas Group
(Table 4).