I have a remodel coming up that is in an old apartment building. The construction is a little different than I am used to. The building is full masonry supported by large steel and concrete columns and beams. The walls structures are vertical stands of rebar with wire mesh attached and stucco on both sides to make a wall 3 inches thick.

The owner is changing the floor plan and would like to add outlets around some of the rooms. There is existing wiremold around most of the rooms but she would like for that to go away. The current plan is to cut a notch near the bottom of the wall all the way to the outlets, attach 4x4 boxes and pipe them together. This would put the outlets in the 8" baseboard that is going in. What is the best way to run the inside corners with the pipe? Or is there a better way to do the whole thing?