Attributes . ATEX IIG Ex ia II C T6...T3 Ga IEC Ex ia IIC T6...T3 Ga CSA Class I, Div 1, Groups A, B, C & D; Class II, Div 1, Groups E, F & G; (T6... T3); Class I Zone 0 AEx ia IIC (T6... T3) Ga & Zone 20 AEx ia IIIC (T76ºC to T146ºC) Da; Ex ia IIC (T6...T3) Ga & Ex ia IIIC (T76ºC to T146ºC) . Names