Yeyiphi iNqanaba loBuqhushumbo-bubungqina obuphezulu, AT2 okanye BT4

Ulandelelwano lwemilinganiselo yobungqina bokudubula irekhodwa ngokuthe ngqo njengo-A < B < C.

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℃

For the ‘T’ ukukala, it’s remembered by its numerical order: inani elikhulu, ireyithingi ephezulu kwaye ikhuselekile.

Ngoko ke, umlinganiselo wobungqina bokudubula kwe-BT4 uyodlula i-AT2.

It’s important to clarify that ‘T’ denotes the maximum surface ubushushu of electrical devices. A T4 rating, set at 135°C, is applicable for qhuma gases with flash points exceeding 135°C.