North Quincy Cable Project

North Quincy Cable Project


The North Quincy Cable Project is the proposed replacement of the 115kV underground electric transmission cables (also known as the 532N and 533N cables) located between National Grid’s North Quincy Substation and National Grid’s Field Street Substation.

In recent years, National Grid has made numerous repairs to this cable system to enable continued delivery of electricity to our customers. Originally installed in 1973 these cables are nearing the end of their service life and need to be replaced. National Grid is proposing to replace the existing cables with new modern cables installed within a concrete duct bank, and manhole system.

Replacement of these aging cables will improve electric reliability for our area customers, and minimize maintenance and repair costs, providing the capacity to meet growing electric energy needs.

National Grid is committed to actively working with local officials in Quincy, residents, local businesses, the Department of Conservation and Recreation, and the Department of Transportation to solicit feedback and maintain an open dialogue throughout the permitting and route selection process. Permitting is expected to begin in the spring of 2020. Under our proposed schedule, we tentatively expect begin construction on a small section of the project route in the late-spring 2021, while the remainder of work is expected to take place in the summer of 2022. The new cables are expected to go into service by late 2023.