Quick question about wiring on an exterior wall
I have the black and decker book but it does not quite answer my question and the NEC is just a little too dense for my amateur knowledge. I am pretty confident with interior wiring, but I have a question about materials and code compliance on an exterior wall. On the south side of my house I want to add a light fixture and a GFCI. The walls are brick and concrete (1920s construction) I am going to cut into the brick to mount the (metal?) boxes, but what I am not sure about is what I have to do to get the romex (which I can use, right?) o the boxes. From the back of the boxes to the inside of the wall there will be about 3 inches. Do I need a conduit here? In short, my question is what do i need to do to get the wire from the inside to the outside? The boxes on the outside will be well about the ground--6 or 7 feet and under a roof overhang.
Can I just use the regular metal or PVC outdoor boxes, obviously with appropriate covers and outdoor lights?
Can I use regular romex?
What kind of conduit and/or seal do I need to connect to the boxes?
Thanks in advance for your help.