One of the documents you are asking about is CAN/ULC-S524. But you need to know which edition is being enforced in your area, as there is 2001 and a 2006 edition.
If you do a lot of fire alarm work this document is a necessity. You can also refer to manufacturers installation recommendation- as you are required to install to these instructions anyways. The system representative should give you the documentation for signal zone wiring.
I can quote CAN/ULC-S524-01
"The installation of all field wiring shall be in accordance with CSA C22.1 Canadian Electrical Code, Part 1, Section 32. When multiple conductors are installed in same raceway, the operation of one circuit shall not affect the operation of another circuit."
General guidelines only, this is why you are also required to follow manufacturers installation rules.
