Fiber - Line Voltage same raceway

Chamuit

Grumpy Old Man
Location
Texas
Occupation
Electrician
Looked at a job today. They are looking at using existing Smurf that has a fiber line in already to also pull Romex from one elevation to the next. New one on me. I did not see any rating on the fiber. Other than wire fill, is there anything preventing this?
 
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