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What's New

Get the latest news and updates important to your business.

Connection Process

Hydro One has a three-phase process for distribution connections to our grid. Get details for each phase below:

Role of Key Players in the Connection Process

Phase 1: Application

  • Contact Hydro One to initiate your connection:

    • If you are a small- or medium-sized business (over 50 kW monthly demand), please call us at 1-888-664-9376 or complete the online form

    • If you are a large business with transformation/nameplate capacity greater than or equal to 2 MVA, please complete the Large Customer Contact Form.

  • A Hydro One representative will schedule an initial customer meeting to discuss your project, the connection process and information needed to get things started

  • You will be asked to complete a New Customer Connection Information (NCCI) form.

Phase 2: Assessment and Estimate

Phase 3: Construction

  • You must schedule and complete an Electrical Safety Authority inspection and provide documentation to Hydro One

  • Once ESA authorization is received, Hydro One will conduct a final inspection and complete your connection

  • If you are a registered market participant with the IESO, you will need to enter into a Distribution Connection Agreement with Hydro One.

Important Connection Considerations

Depending on the size and scope of your project, approvals may be required throughout the process and could have a significant impact on project timelines. They can include, but are not limited to:

  • Environmental approvals to construct facilities on environmentally sensitive lands

  • Municipal approvals and permits, including land easements and land acquisitions

  • Sufficient capacity available or the need for future expansion.

Once You’re Connected

Once you are connected, Hydro One’s dedicated Business Customer Centre advisors are here to:

  • Help resolve inquiries regarding rates, energy usage, your service, billing and payments, meter data access and any other account changes

  • Provide detailed billing breakdowns and strategic advice for energy management

  • Help with the process and expectations for service upgrades and new connections

  • Forecast energy costs of new equipment, new services or service upgrades

  • Provide advice on Hydro One policies and processes, including how they may relate to Ontario Energy Board (OEB) regulations and Independent Electricity System Operator’s (IESO) programs

  • Advise on conservation initiatives available and how customers can apply.

Business Rates

Do you own or operate a commercial/industrial business? Learn more about what components make up the cost of delivering electricity to you.

Business Rates

Generation Connections

Learn more about Generation Connections and find the forms needed to get started.

Generation Connections


Programs and Services

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Interval-billed customer web portal

Hydro One’s interval-billed customers have access to an online data portal. Customers can register to access the portal in order to view their hourly energy usage and extract it for further analysis and reporting. Stay tuned for an upgraded solution coming soon.

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myAccount customer web portal

Customers not on interval billing can register and log in to myAccount to access their bill and other online services like high usage alerts, outage alerts, paperless billing and more!

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Get Outage Alerts on your mobile device

Log in to myAccount to activate power outage alerts sent directly to your mobile device through text message or email. Go to "account preferences" to sign up.

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