Romex in conduit attached to an enclosure (indoors), fastening requirements

Can somebody point me to the section of code that says you can install Romex in conduit or raceway??

Thanks
Any of the conduit articles 3XX.22, for example EMT

358.22 Number of Conductors. The number of conductors
shall not exceed that permitted by the percentage fill
specified in Table 1, Chapter 9.
Cables shall be permitted to be installed where such use
is not prohibited by the respective cable articles. The number
of cables shall not exceed the allowable percentage fill
specified in Table 1, Chapter 9.
 
Top