National Grid
Getting Connected Transmission Delivery Customers Wholesale electric customers (such as municipal electric departments) requiring new or upgraded connections to the transmission system should contact our Transmission Commercial Services Department for assistance. In many cases, you will also need to contact ISO New England* and/or New York ISO*, as applicable for your locale.

Existing Generators If you are planning an expansion, please Contact your Account Manager to discuss your plans and review the steps you'll need to take.

New Generators To establish a new connection to our electric transmission system complete the following steps:
  1. First, register with the regional system operator for your locale—ISO New England* or New York ISO*.

  2. Next, please review important New Generator Documentation that applies to your profile.
Interconnection Documents
Related Information

System Operators:

ISO New England / NEPOOL (*)

New York ISO