Important Documents

A collection of important reference material for builders and contractors working on Eversource's Eastern Massachusetts electric and gas infrastructure.

Effective February 1, 2018 changes were made to Eversource's Terms & Conditions for Distribution Service in Eastern Massachusetts. An updated tariff is currently available.

Information available on is currently under review and will be revised as soon as possible to reflect any changes. If you have any questions regarding our line extension policies, please contact us at 800-880-2433. 

Electric & Gas Documents

Standards Documents

The following documents detail the preferred construction methods and materials for construction projects interacting with our electric infrastructure.

Design Standards

Construction Standards

Material Standards

Work Standards

Manufacturers Lists