Umahluko phakathi kweNqanaba le-AT4 lobungqina bokuqhuma kunye ne-BT4

Zombini iindidi zigcina ukuhlelwa kweqondo lokushisa kwe-T4, ngoko ke umahluko uvela phakathi kweZowuni A kunye neZowuni B. Uqikelelo lobungqina bokudubula i-BT4 ludlula olo lwe-AT4.

Udidi lwemeko	Ukuhlelwa kwegesi	Iigesi ezimele	Ubuncinci beNtlantsi yokuLawula amandla
Ngaphantsi koMgodi	I	IMethane	0.280mJ
Iifektri eziNgaphandle koMgodi	IIA	Ipropane	0.180mJ
	IIB	Ethylene	0.060mJ
	IIC	Ihydrogen	0.019mJ

Kukho umahluko omkhulu phakathi koKlasi ⅱa kunye noDidi ⅱb. Udidi ⅱb, umgangatho ophezulu, is typically designated for fuels like ipetroli, idizili, and crude oil; Class ⅱa, kwelinye icala, applies to standard explosion-proof areas, such as for propylene.

It primarily depends on whether a substance falls under Class ⅱa or Class ⅱb. Equipment rated for Class ⅱa can be utilized in Class ⅱa environments; nangona kunjalo, Class ⅱb environments cannot employ Class ⅱa equipment.