The IIC classification exceeds the IIB classification and serves as a reference for designing electrical equipment in explosive environments.
Condition Category | Gas Classification | Representative gases | Minimum Ignition Spark Energy |
---|---|---|---|
Under The Mine | I | Methane | 0.280mJ |
Factories Outside The Mine | IIA | Propane | 0.180mJ |
IIB | Ethylene | 0.060mJ | |
IIC | Hydrogen | 0.019mJ |
All devices fall under the T4 temperature classification, where the maximum allowable surface temperature is capped at 135°C.