Class 2 circuit conductors can be in the same cable, cable routing assembly, enclosure, or raceway with other Class 2 circuit conductors [Sec. 725.139(A)]. Class 2 circuits can be in the same cables ...

Class 1 circuit conductors must have an insulation rating of at least 600V [Sec. 725.49(B)]. General requirements. Class 1 circuits must also comply with the general requirements of Art. 725, Part 1 ...