Electrical Equipment Classification
In approximate terms the Explosion Protection Levels
(EPL) Ga, Gb, Gc correspond to the Equipment
Categories 1G, 2G and 3G which align with the Zones
0, 1 and 2. The latest IEC standards mean that nA
(non sparking) will become ec (for EPL increased -
zone 2); e (increased safety) will become eb (for EPL
high - zone 1) and d (flameproof) will become db (for
EPL high – zone 1). This terminology is mandatory
from 2018.