What Does Explosion-Proof Level ABC Mean

The “abc” represents gas classifications, categorized into three levels—IIA, IIB, and IIC—according to the maximum experimental safe gap (MESG) or the minimum igniting current (MIC).

Condition Category	Gasi Gulu	Woimira mpweya	Minimum Ignition Spark Energy
Pansi pa Mgodi	Ine	Methane	0.280mJ
Mafakitole Kunja Kwa Mgodi	IIA	Propane	0.180mJ
	IIB	Ethylene	0.060mJ
	IIC	haidrojeni	0.019mJ

Of these, the IIC classification is deemed the most hazardous, with IIB and IIA following in decreasing order of risk. Gases falling under the IIC classification include hydrogen, acetylene, carbon disulfide, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, ndi haidrojeni sulfide. The IIA classification includes gases such as methane, ethane, benzene, ndi dizilo.