I have a box to hook up my generator to my house. Since my panel is in my home and not in the garage,when I use it I have to feed the wire out a window. Not too quiet and a pita. I am planning to put a plug on the exterior and wire it to the box inside. I will be using 10/3 with ground. The question is,since I will be running it inside the walls,would it be wise to run the iwre in flex conduit for protection??