Middle Tennessee – Choosing the Right Power Provider Nashville Electric Service is among the twelve largest public electrical utilities in the United States, delivering power to over 370,000 residential customers in Middle Tennessee. The NES service area encompasses 700 square miles, all around Nashville/ Davidson County and parts of the surrounding six counties. It supplies power to schools, government facilities, businesses, and homes. It’s a publicly owned utility owned by Tennessee Power Company (TPC) and is funded through rates set by the Tennessee General Assembly. Tennessee Power Company serves Nashville and the six surrounding areas as its wholesale electric supplier.