Octagon Box Extension Ring | Csa File Number: Lr-29601; Ul Specifications: Ul 486a-B; Ul File Number: E6207 | Group a and B: Class I, Division 1 and 2, Groups a , B, C, D, Class Ii, Division 1 and 2, Groups E, F, G, Class Iii; Group C and D: Class I, Division 1 and 2, Groups C, D, Class Ii, Division 1 and 2, Groups E, F, G, Class Iii; Ul 1598, Ul 844, Ul E10444, c