1. Surface wiring: This method involves running wires along the surface of walls, ceilings, or floors. It is typically used in older buildings or in areas where it is difficult to install concealed wiring. 2. Concealed wiring: This method involves running wires inside walls, ceilings, or floors. It is more aesthetically pleasing than surface wiring, but it is also more difficult and expensive to install. 3. Underfloor wiring: This method involves running wires under the floor. It is a good option for areas where there is a lot of foot traffic or where it is difficult to access the walls or ceilings. 4. Overhead wiring: This method involves running wires overhead. It is typically used in industrial or commercial buildings where there is a lot of space available.