Zida zamagetsi za Class I sizitsatira dongosolo lapadera.
Za zida zamagetsi za Class II, Kugawikana kumatsimikiziridwa ndi mtundu wa gasi woyaka womwe umakumana nawo. Zidazi zimagawidwanso m'magulu atatu omwe sangaphulike: IIA, IIB, ndi IIC.
M'malo ogwiritsira ntchito zida zamagetsi za Class 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 zophulika dust environment, Class III electrical equipment is segmented into three categories: IIIA, IIIB, and IIIC.