Nivelul de rezistență la explozie al zonei de gaz

Coal gas’s flammable constituents include carbon monoxide and hydrogen, the latter falling under the explosive gas category of Class IIC. Differing from natural gas, for which IIBT4 explosion-proof electrical equipment suffices, coal gas necessitates the use of IICT4.

For additional safety assurance, conducting gap tests or minimum ignition current experiments is advisable.