Electrical Cable Method of installation (see Appendices B and G) Non-metallic-sheathed cable
1) The cable shall be run in continuous lengths between outlet boxes, junction boxes, and panel boxes as a loop system and the joints, splices, and taps shall be made in the boxes.
2) Where concealed wiring is connected to non-metallic-sheathed cable, the junction shall be made in a box.
3) Where open wiring is connected to non-metallic-sheathed cable, the junction shall be made in a box or at, or in, a fitting having a separately bushed hole for each conductor.
4) Where non-metallic-sheathed cable is run in proximity to heating sources, transfer of heat to the cable shall be minimized by means of an air space of at least
a) 25 mm between the cable and heating ducts and piping;
b) 50 mm between the cable and masonry or concrete chimneys; or
c) 150 mm between the cable and chimney and flue cleanouts.
5) Notwithstanding Subrule 4), a thermal barrier conforming to the requirements of the National Building Code of Canada or local building legislation shall be permitted to be installed between the cable and heating sources to maintain the ambient temperature of the cable at not more than 30 °C.
6) Two-conductor cable shall not be stapled on edge.
Source: Rule 12-506, CSA C22.1:21, Canadian Electrical Code, Part 1 (25th Edition), Safety Standard for Electrical Installations. © 2021 Canadian Standards Association. Please visit store.csagroup.org
