If raceway is too small, you can damage conductors while trying to pull them through. Even if they aren’t damaged during the pull, they may overheat inside an undersized raceway. For these reasons, ...

I googled this and don't seem to be finding anything saying its necessarily bad or against code (but not necessarily recommended either). Is it against code or bad in any way to run fiber inside of a ...

Explanation: A change to the 2023 NEC in Sec. 342.20 now permits a maximum size of 6 in. in-lieu of the previous maximum size of 4 in. for intermediate metal conduit. A similar change to Sec. 358.20 ...