Where any part of an installation is to be hidden from view by the permanent placement of parts of a building, the person installing the wiring shall notify the inspector and such parts of the installation shall not be concealed until they have been inspected and approved. On large installations where the concealment of parts of the wiring proceeds continuously, the person installing the wiring shall give the inspector due notices and inspections shall be made periodically during the progress of the work. (Prior code § 16-1-20)