Conn. Agencies Regs. § 16-11-136
Construction involving electric lines, where nominal phase to ground voltages are less than twenty thousand volts, may proceed without notification to the commission, provided reasonable advance notice is given to the utilities or municipalities involved, advance planning and interchange of information is coordinated, and agreement regarding proposed construction and operating characteristics is obtained from other utilities or municipalities involved. This section is not intended to preclude the participating companies from developing broad areas of approval, where coordination can be safely developed for specific types of facilities either in the power or telephone plant. Nothing in this section is intended to alter the requirements of the general statutes. For the purposes of this section construction shall mean the erection and installation of the physical facilities excluding the planning and other work preliminary thereto.
Conn. Agencies Regs. § 16-11-136