At our shop(factory), we need to run some 120v receptacles to 5 workbenchs the only way i see to do it is go across the floor with rigid then up one bench and then we have a pcs of 1" box that is welded to the top of each table to support a 1 1/2 inch air line is it within code to attach my emt to the 1" box tubing just under the air line. then i would be able to put an outlet at each table, that would be feed from a 20amp breaker in a panel on the wall.