advice to install 30A RV Receptacle in garage to power RV

westend wrote:
Discussion of NM wire in conduit at the Mike Holt forum, 5 pages of why it's not allowed--NM wire (romex) in PVC

That discussion has very little if anything to do with NM (Romex) being allowed or not in conduit, and a whole lot about it not being allowed in damp/wet locations, which happens to include conduit that is in a damp or wet location. In other words, the conduit doesn't magically make the non-damp-location wiring suitable for damp locations.