Building wiring refers to the system of electrical conductors and devices that distribute electricity throughout a structure. This includes the installation of wires, outlets, switches, and circuit breakers, which are essential for powering lights, appliances, and other electrical equipment. Proper wiring ensures safety and efficiency in the use of electrical energy. The design and installation of building wiring must comply with local electrical codes and standards, such as the National Electrical Code (NEC) in the United States. This helps prevent hazards like electrical fires and ensures that the system can handle the electrical load required by the building's occupants.