Eksplozijsko varna stopnja DII BT4 in DII CT4

The IIC classification exceeds the IIB classification and serves as a reference for designing electrical equipment in explosive environments.

Kategorija stanja	Razvrstitev plinov	Reprezentativni plini	Najmanjša energija vžiga
Pod rudnikom	I	Metan	0,280 mJ
Tovarne zunaj rudnika	IIA	Propan	0,180 mJ
	IIB	Etilen	0,060 mJ
	IIC	Vodik	0,019 mJ

All devices fall under the T4 temperature classification, where the maximum allowable surface temperature is capped at 135°C.