Electrical work is a collective term for any form of labor or materials used in the installation, maintenance, or extension of an electrical wiring system in a building or structure. ... Besides installation and maintenance, electricians also inspect the building to address any electrical problems before breakdowns occur. An electrician is any skilled tradesperson who designs, installs, maintains, and repairs the electrical systems and products used in residential homes, businesses, and factories. Electricians work inside or outside buildings to ensure lights, industrial equipment, and appliances operate safely and reliably.