Attributes . N1 Series: Class I, Division 1 And 2, Groups C, D, NEMA 3R, 4X, 7CD, 12; N2 Series: Class I, Division 2, Groups B, C, D, Class II, Division 1 And 2, Groups E, F, G, Class III, NEMA 3R, 4X, 9EFG, 12; UL 508, UL 698, UL 1203, UL E10449, E81751 . Names