From what I read the problem is the paper packing in the NM. It can wick water. I am not sure why they still have the paper in there in the first place. I suppose it is just so they can sell UF for more money and make you carry two products. That is really 3 products if you include "damp" rated NM-c but I have never seen that. When you look for NM-c on the web sites for the manufacturers you get routed to UF
