When you start building or renovating a house, you must have a floor plan and an electrical plan or electrical drawing for the house's electricity and power. In this article, we will discuss a house's electrical plan. An electrical plan or drawing is a technical drawing used in architecture and engineering that shows the relationship between power, lighting, wiring, and communication in a building or house. A house electrical plan, also known as a house wiring diagram, is a visual representation of a house's entire electrical wiring system or circuitry (or a room).