The IIC classification exceeds the IIB classification and serves as a reference for designing electrical equipment in explosive environments.
| Usage Area | Gas Classification | Representative Gas | 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.
