I have a "pony" wall in a clinic that is free standing and has to have a network for receptacles to supply equipment that is located in areas for patient care. I was told to install pvc under the slab to provide a raceway to this wall, and then to pipe in emt from the pvc to the home run. I say this is wrong. It does not provide for a means of redundant ground in patient areas. The building is being wired in medical grade "MC" Cable for the branch circuits.