It-tagħmir elettriku tal-Klassi I ma jaderixxix ma' sistema ta' gradazzjoni speċifika.
Għal tagħmir elettriku tal-Klassi II, klassifikazzjoni hija determinata mit-tip ta 'gass fjammabbli li jiltaqa' magħhom. Dan it-tagħmir huwa kkategorizzat aktar fi tliet tipi kontra l-isplużjoni: IIA, IIB, u IIC.
F'ambjenti li jutilizzaw tagħmir elettriku tal-Klassi I, where combustible gases other than methane are present, compliance with both Class I and Class II explosion-proof standards is mandatory.
Based on the specific properties of the splussiv dust environment, Class III electrical equipment is segmented into three categories: IIIA, IIIB, and IIIC.