code or not code,accepted or not as common practice.o.k. building is block construction with the block as finished product.you install a "mud box" at device location and run pvc conduit up inside the block and 90 it out when above suspended ceiling height.when it's time to pipe the branch circuits you cut the pvc 90 just about flush to the wall,k.o. the back of a 4"sq. and mount the box to the wall. all branch circuits will have an equip. grounding conductor and all boxes will have grounding pigtails installed. let's hear it!! thanks.