ECN Electrical Forum
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Voice communication speakers operating at 70volts, we have always pulled wires into conduits with our audible and visible signals( bells/Strobes ). I have been told this is no longer allowed but no one can give me a specific code and rule that says we are not to do this. Do we now have to run a seperate raceway for the 70volt speakers for the Fire alarm?

Maybe your answer will be in one of these standards
i dont think they are cheap though
http://www.cfaa.ca/codesandstandardsupdate.html

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.