Yintoni umahluko phakathi kwamanqanaba obungqina bokudubula i-IIB kunye ne-IIC

I-IIB kunye ne-IIIC zombini zisebenza njengohlelo lwezixhobo zombane ezinobungqina bokudubula kwiindawo ezinothuli, ngoluhlu lwe-IIC ngaphezu kwe-IIIB.

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℃

Kwiimeko ezingqongileyo ezihlelwe njenge-IIA, IIIB, okanye IIIC, Iindawo ze-IIC zibeka ingozi enkulu. I-IIC iinjini ze-servo ezinobungqina bokudubula zifanelekile ukuba zisetyenziswe kwindawo ezinothuli ze-IIB, kanti iinjini ze-IIB azenzelwanga ukusetyenziswa kwindawo ezinegesi.

Zonke iinjini ze-servo ezinobungqina bokudubula zihlelwa njenge-IIC, ukwenza ukuba zilungele uluhlu lweemeko ezinothuli.