INqanaba lobungqina bokudubula Db

I-Db imele umgangatho omtsha wesizwe kwimpawu zobungqina bokudubula kunye namanqanaba okukhusela, eyilelwe ngokukodwa izixhobo kwiindawo ezinothuli ezisebenzayo kwiiZowuni 21 kwaye 22.

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℃

Umzekelo yi-DIP A21 TA T6 Db DIP, ebonisa isixhobo seendawo zothuli; ukuba ibhalwe Eks, ibonisa ukufaneleka kweendawo zegesi.