Running anything other than mains power in the same conduit as mains power is a bad idea, there are many codes and many “spirits” of the code that prohibit this

Running anything other than mains power in the same conduit as mains power is a bad idea, there are many codes and many “spirits” of the code that prohibit this. PVC is insanely cheap, a separate (properly spaced!) conduit for telecom is the way, and is future proof.