I need to run some new wiring up from the basement into the wall. Is this
concrete that the wiring is currently run through? It's not very dense but
very hard. Instead of drilling another hole I was thinking I could cut the
armored cable from the top and then just rip it out from the bottom. Could I
then just run the romex through that hole.

Picture
http://s107.photobucket.com/albums/m...t=IMG_1756.jpg

Thanks
Dante