PLAN No. 1190. MOLDING WIRING
In molding wiring conductors are held in a flat wooden or metal molding screwed to the wall or ceiling surface. Wooden molding, however, is not now commonly used, and in many cities its use is prohibited. The metal molding which is superseding the older nonmetallic molding is small, unobtrusive, and readily installed. It is used principally for extensions to existing wiring installations. By its use the cutting of holes and channels in walls and ceilings, which is necessary for the installation of concealed wiring, is eliminated.