If electrical wiring has a square or rectangular cross-section,itcan be attached to a wall or ceiling with an adhesive. Using adhesives to install wires with round cross-sections is difficult or impossible,because the round cross-section presents very little surface area for the adhesive to stick to. If wiring can be installed with adhesives, the electrical fixtures, such as switches and outlets, can also be installed with adhesives. It may be possible to use a machine to install wiring and electrical fixtures to walls and ceilings by literally gluing it to the walls. Some inventions for this type of wiring are shown in the illustrations below.