Domestic wiring refers to wiring done in homes to provide electrical power for lighting, fans, and appliances while ensuring safety. Key factors that affect the choice of wiring include durability to withstand weather and fumes, electrical safety to prevent shocks and fires, appearance, cost effectiveness based on the building type and purpose, accessibility of switches and plug points, low maintenance costs, and protection against mechanical damage. Common aspects of domestic wiring systems that are discussed include 3-phase power, service mains, meter boards, distribution boards, concealed and multi-way circuit wiring, overcurrent protection devices, earthing, and residual current circuit breakers.