I have demolished the interior of part of my house, removing many walls. What I have left are some wires hanging from the ceiling and coming through the floor. Most of them are in the wrong places for the new walls or are just not needed (a 50 amp circuit for instance). What can I do to get rid of them? I know they're supposed to go into boxes with covers that remain accessible, but I don't want them where they are and they may not be long enough to move them anywhere suitable for boxes. It might be nearly impossible to remove the wires back to the next box (or all the way back to the main panel - especially that 50A one). What to do? There is an 18" space below the subfloor where the floor trusses are. Can't I just put boxes in there that aren't accissible? How about in the attic? Can I just solder and shrinkwrap extension wires on to get them to where I need them?