Studying and familiarizing self with departmental orders, instructions, and procedures, wiring of electrical circuits, equipment diagrams, and principal functions of various substation equipment; studying and memorizing the Company's symbol system used for identifying equipment, circuits, and substations. Headquartered in Akron, Ohio, FirstEnergy includes one of the nation''s largest investor-owned electric systems, more than 24,000 miles of transmission lines that connect the Midwest and Mid-Atlantic regions, and a regulated generating fleet with a total capacity of more than 3,500 megawatts.