C.E.C. Rule 4-034 (2)

4-034  Use of Identified conductors 4-034 (2)  Where armoured cable, aluminum-sheathed cable, or nonmetallic sheathed cable containing an identified conductor is used for single pole, 3-way or 4-way switch loops, it shall not be necessary to render the identified conductor permanently unidentified at the switch if the connections are made so that an unidentified conductor is the return from the switch to the outlet.