During the early morning hours of Saturday, Sept. 30, United Illuminating will be conducting system testing at its Trap Falls electrical substation in Shelton to maintain the reliability of its energy grid. During this procedure, which will be conducted between 3 and 5 a.m., customers in some areas of Shelton and Stratford may experience a brief service interruption. This is expected to last less than 5 minutes. Customers may wish to check clocks and electronic devices that typically need to be reset following an outage. This work is part of UI\u2019s ongoing commitment to providing a safe, reliable energy grid that\u2019s capable of meeting the needs of its customers and communities now and into the future.