Transmission Load Connection Process  

There are six phases in the Customer Connection Process that include multiple steps and procedures within each phase that may overlap to facilitate critical In-Service dates.

		Approximate Timeline: An average connection can take anywhere from 18 months to over 3 years to complete. Certain land issues and approval processes can extend project timelines significantly.
		IESO Connection Assessment & Approval (CAA) Customers requesting a new or modified connection to Hydro One's transmission system must apply and register with Hydro One and The Independent Electricity System Operator (IESO). The IESO Connection Assessment and Approval (CAA) is a separate process that runs parallel with Hydro One's Customer Connection Process. The IESO's CAA is intended to determine the potential impact on the reliability of Ontario's transmission system grid.

Important Connection Considerations

Regulatory approvals may be required throughout the process and could have a significant impact on project timelines.  They can  include:

• Ontario Energy Board (OEB) approval (Leave to Construct) is required for transmission lines in excess of 2 km
• Environmental approvals to construct facilities on environmentally sensitive lands
• Municipal approvals and permits, including land easements and land acquisitions

For customers planning to upgrade their connection to Hydro One's transmission system or requiring a new or modified connection, please contact your Account Executive for initial consultation.