[SpikedCola]

I did exactly this when I built my shed (with the same justification) - running fiber in the same conduit as the power to the shed.

But, I found out during inspection that the Canadian Electrical Code prohibits this, unless the fiber is functionally related to the power lines it is running with (section 56-200).

The explanation I received for the rule, was that someone like a telco installer could try and follow the fiber line, and find themselves in a dangerous situation (inside an electrical panel they aren't trained to handle).

I was able to get an exception since I am the only one who will ever open the cabinets/work on this fiber, since it was not the main internet feed to the house, but just to an outbuilding.