Can you use romex cable in an enclosed electrical panel?

Question

I have conduit coming into the panel and into a junction box. This conduit has 2 sets of wiring for 2 different lights. From this box I have 2 romex cables going into 2 breaker boxes. These breaker boxes are for 2 of 4 apt. units. Is this OK or should there be flex or BMX going to the breaker boxes??

Answer 1

Provided the romex is properly sized and grounded, and

protected from damage, it's approved for feeder wiring

in dry residential applications.