Izinga Lokufakazela Ukuqhuma Db

I-Db imele indinganiso kazwelonke entsha kumaki okuvikela ukuqhuma namazinga okuvikela, yakhelwe ngokukhethekile amadivayisi asezindaweni zothuli ezisebenza Ezindaweni 21 futhi 22.

III	C	T135℃	Db	IP65
III Uthuli olungaphezulu		T1 450℃	Ma	IP65
		T2 300℃	Mb
		T3 200℃
	A Izihlahla ezindizayo ezivuthayo		Futhi
		T4 135℃
			Db
	B Non conductive dust	T2 100℃	UDkt
	C Uthuli lwe-conductive	T6 85℃

Isibonelo yi-DIP A21 TA T6 Db DIP, okubonisa idivayisi yezindawo zothuli; uma ibhalwe ngokuthi Ex, kukhombisa ukufaneleka kwezindawo zegesi.