Well couldn't i just use ser cable on the outside? From the weather head along the wall to a hole in the cinder block then to a sweep 90 and then down the inside wall to the socket.? The run will be about 12ft from the ground outside and i could do without the conduit. 2in emt will hold 4 4/0 aluminum wire(3 hots and a neutral) as per the code book. I would just use it inside the shop to protect it