Conductors in parallel runs

Where conductors are installed in parallel in separate cables, raceways, or bus, a bonding conductor
shall be installed with each group of parallel conductors.

Source: Rule 10-602, 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