Lithetha ukuthini iNqanaba le-AT1 lobungqina bokudubula

Akukho mveliso yenkampani okwangoku ibambe isiqinisekiso sokudubula kwe-Exd IIA T1(Iqela lobushushu elisezantsi).

III	C	T 135℃	Db	IP65
III Uthuli olungaphezulu		T1 450℃	Ma	IP65
		T2 300℃	Mb
		T3 200℃
	A Iindiza eziphaphazelayo ezinokutsha		Kwaye
		T4 135℃
			Db
	B Non conductive dust	T2 100℃	Dc
	C Uthuli oluqhubayo	T6 85℃

Ulwahlulo lwe-IIA lubonisa ukhuseleko lokuqhushumba kwerhasi kuKlasi IIA, ngokukodwa propane, isetyenziswa kakhulu kwizixhobo zokukhupha amafutha;

Iqondo lobushushu le-T1 lichaza ukuba ubushushu bomphezulu besixhobo abunakugqitha kuma-450°C.