The most common electrical service that electricians provide is the installation, repair, and maintenance of electrical systems and components in residential, commercial, and industrial buildings. This includes services such as installing light fixtures, repairing faulty wiring, upgrading electrical panels, and installing electrical outlets and switches. Other common electrical services include installing and maintaining electrical appliances, such as air conditioning units and water heaters, and performing safety inspections to ensure that electrical systems are functioning properly and up to code.