Guide to Explosive Atmospheres & Hazardous Locations

1,2 2 IEC 60079-7 IEC 60079-15 No arcs, sparks or hot surfaces. Enclosure IP54 or better Flameproof Type ‘n’ (enclosed break) d nC Gb Gc 1,2 2 IEC 60079-1 IEC 60079-15 Contain the explosion, quench the flame Quartz/sand filled q Gb 1,2 IEC 60079-5 Quench the flame Intrinsic safety Intrinsic safety Intrinsic safety ia ib ic Ga Gb Gc 0,1,2 1 ... ................
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