NEC: Class I, Division 1 And 2, Groups C, D, Class II, Division 1 And 2, Groups E, F, G, Class III; CSA: Class I, Division 1 And 2, Groups B, C, D, Class I, Zone 1 And 2; IIB, IIA, Class II, Division 1, Groups E, F, G, Class II, Division 2, Groups F, G, Cl