Pa Lefel Prawf Ffrwydrad Sy'n Uwch, B neu C

The explosion-proof classification of IIC is considered superior, encompassing the requirements for both IIB and IIA, with IIB rated above IIA.

Categori Cyflwr	Dosbarthiad Nwy	Nwyon cynrychioliadol	Isafswm Tanio Spark Energy
O Dan Y Mwynglawdd	i	Methan	0.280mJ
Ffatrïoedd y Tu Allan i'r Mwynglawdd	IIA	Propan	0.180mJ
	IIB	Ethylene	0.060mJ
	IIC	Hydrogen	0.019mJ

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