I want to make "semi permanent" wiring in my shop, which is one car garage. Originally, I had regular 15A, 110V outlet there. I've got two extra 20A, 110V lines from my utility room, which is across the wall. I use two electrical extension cords to bring the power to my garage. Now I decided to make permanent wiring. I am thinking of surface mounting in conduits. I can go with metal or PVC conduits/boxes. PVC looks little bit less expensive and easier to work with, though metal adds not significantly more expenses and labor. So, my question is which is better, and WHY?
As for "semi permanent". If I decide to sell my house, I'd rather dismount all new wiring to avoid some problems.