BELD supplies electric service to approximately 14,000 residential and business customers in the town of Braintree using cost-of-service rates, which are among the lowest in the state. The utility operates generation, transmission and distribution facilities. BELD's 14-square-mile service territory includes 148 miles of overhead lines and 88 miles of underground lines. We operate three electric distribution substations and two 115 kilovolt (kV) transmission interchange substations. BELD is connected to two separate 115 kV NStar transmission lines, which are part of the ISO New England electric grid. This provides BELD with easy access to power supply sources throughout the Northeast. BELD is a founding member of Energy New England (ENE), an organization dedicated to helping municipal electric utilities with power procurement, residential energy conservation services, consulting and more. Click on a topic for details on our energy and electrical system.