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IMPORTANT NEWS: Technical Interconnection Requirements are being reviewed and your feedback is welcome. Learn more.

We are proud to supply electricity to over 60 Local Distribution Companies (LDCs) across the province. Each of these LDCs have significant power requirements and unique needs. This page provides information and resources for LDCs connected to our system.

Important Information for LDCs

Get the latest news and updates important to your local distribution company.


Important Information for LDCs


  • Transmission Load Connection applicants please visit here.

  • The “Threshold Allocation Assessment (TAA)" process has been changed to “Threshold Allocation (TA)". TA applicants now receive an Agreement Letter acknowledging capacity based on Bus Type as opposed to previous classifications based on "Inverters" and “Load Displacement."

  • The fee for a Threshold Allocation (TA) is $500 and does not vary according to project size. Note: This fee is applicable for 1) New applications; and 2) Revised applications if a detailed study is required.

  • Projects that apply for a new CIA after rescinding a previous one will be charged an amount equal to 50% of the applicable CIA fee if the project connects to the same station and feeder. 

  • Projects that are less than or equal to 500 kW, and are LDC-owned or connected to express feeders, a Single Line Diagram (SLD) and Protection Description Matrix are required. This ensures we are properly documenting telemetry while also properly planning for the future needs of our distribution system. Similar to other projects, the SLD and Protection Matrix must be provided no later than 8-weeks prior to the In-service Date of the project. See Documents & Timelines for LDC Based Projects (above) for all LDC projects. See the bulletin regarding this requirement. ​

Contact us at for more information on LDC Generation.

Wholesale Revenue Metering (Meter Exit) Program

Wholesale Revenue Metering (Meter Exit) Program

Customers connected to the IESO control grid are responsible for their wholesale revenue metering.

Learn More

Power Quality Incident Reporting

Customer equipment can adversely affect the quality of supply to another customer through Power Quality (PQ) disturbances. We respond to our customers' issues through an Inquiry Response Process.

Learn More

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Contact us — we're here to help

We offer programs for our large customers to help manage their electricity supply connections with our network. These programs have been developed in accordance with various regulations and Market Rules and the obligations they place on participants.

Email Us 

Programs for Local Distribution Companies.

Programs for LDCs  

Power Quality information for LDCs.

Power Quality  

Links and Forms

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Get forms and resources for Local Distribution Companies here.

See Links and Forms  


If you are a Transmission Load Connection applicant, please visit here.