IIC

Explosion-proof classifications are divided into IIA, IIB, and IIC, with IIC being the highest level, followed by IIB and IIA.

These represent completely distinct concepts. IIC is typically associated with explosion-proof environments, characterized by substances such as hydrogen and ethyl nitrate.

Class II, Category C. The designation d iic t4 indicates an explosion-proof classification of Class II, Category C.

AH-G1/2" series AH-G3/4" series AH-G1" series

Explosion-proof equipment within Class II is categorized into: Class IIA, Class IIB, and Class IIC. The ratings follow a hierarchy: IIC > IIB > IIA.

Ex: The mark for electrical equipment used in explosive gas environments; db: Protection type is flameproof; eb: Protection type is increased safety...