Electricians Guide

Electrical Work in Ontario: A Regulated Trade

Unlike painting or snow plowing, electrical work in Ontario is a regulated trade with mandatory licensing, permitting, and inspection requirements. The Electrical Safety Authority (ESA) is the regulatory body responsible for administering the Ontario Electrical Safety Code and overseeing all permitted electrical work in the province. The ESA's mandate exists for good reason: improperly performed electrical work is a leading cause of residential fires in Canada.

For homeowners in Renfrew County — a region where many properties were built before modern electrical standards and where electrification of home systems is accelerating through heat pumps, EV chargers, and solar installations — understanding the rules around licensed electrical work is increasingly important.

ESA Licensing: The Certificates You Need to Know

All electricians performing work in Ontario must hold a valid Certificate of Qualification issued by Skilled Trades Ontario (formerly the Ontario College of Trades). Two certificates are directly relevant to residential work:

• 309A — Master Electrician: The full electrical licence in Ontario, covering both commercial and residential work. A 309A holder can also obtain an ESA electrical contractor licence and pull permits in their own name. This is the credential for more complex residential projects, including panel upgrades, solar interconnections, and new service installations.
• 309C — Residential Electrician: A restricted licence covering residential construction and renovation electrical work. A 309C holder is qualified for most single-family residential work but has a more limited scope than a 309A. Verify that a 309C electrician's licence scope covers your specific project.

To verify an electrician's licence before hiring, use the public registry at skilledtradesontario.ca or the ESA's contractor search at esasafe.com. Ask the contractor for their ESA contractor licence number — separate from their personal certificate of qualification — before work begins.

When Do You Need an Electrical Permit in Ontario?

Most non-trivial electrical work requires an ESA permit before work starts. Work that requires a permit includes:

• Installing any new circuit (including adding outlets)
• Electrical panel upgrades or replacements
• EV charger installation (Level 2 and above)
• Adding circuits in kitchens or bathrooms
• Solar photovoltaic systems and net metering interconnections
• Any electrical work associated with a home addition or major renovation
• Heat pump electrical connections and associated wiring upgrades
• Generator hookups (interlock or transfer switch installation)

The licensed electrician you hire pulls the permit, performs the work, and arranges for an ESA inspector to visit and approve the installation before the work is covered or the system is energized. Never agree to electrical work described as "no permit needed" for work that falls within the above categories — unpermitted electrical work may void your home insurance and can complicate or block a property sale.

Panel Upgrades: A Common Need in Renfrew County Homes

Many older properties in Renfrew County were built with 60-ampere or 100-ampere electrical service — capacity standards appropriate for the era of electric stoves and a handful of outlets, but inadequate for modern loads. A 60A panel is effectively incompatible with today's homes; a 100A panel is marginal for a household with an electric vehicle charger, heat pump, and modern appliances.

A residential service upgrade to 200 amperes is the current standard for most homes and is typically required as a condition of connecting an EV charger, heat pump, or solar system. The cost for a 200A panel upgrade in Ontario generally ranges from $2,000 to $5,000 or more, depending on:

• Current panel type and condition (some older panels — including Federal Pacific and Zinsco brands — present additional hazards and require full replacement)
• Whether the meter base and utility connection point need upgrading
• The amount of rewiring required to bring the installation up to current Ontario Electrical Safety Code standards
• Local ESA permit fees
• Whether Hydro One or local utility coordination is required to upgrade the service drop

Panel upgrades are eligible expenses under several federal and provincial energy programs — see the related grants listed below.

EV Charger Installation

Electric vehicle adoption is increasing across Renfrew County, and Level 2 EV charger installation (the standard home charging setup) is one of the most common electrical projects homeowners are undertaking. A Level 2 charger requires a dedicated 240-volt circuit, typically at 40 or 50 amperes, connected to your electrical panel.

Installation requirements:

• A licensed electrician (309A or 309C) must perform the work
• An ESA permit is required
• An ESA inspection must be completed before the charger is used
• If your existing panel capacity is insufficient, a panel upgrade may be required first

Total installed cost for a Level 2 EV charger in Ontario — including the charger unit, permit, wiring, and ESA inspection — typically runs $1,200 to $3,000. Homes with panels near the charger location and adequate existing capacity are at the lower end; those requiring panel upgrades or long wire runs are at the higher end.

Solar and Net Metering Connections

Solar photovoltaic systems that connect to the Ontario grid require both an ESA permit and inspection, and approval from the local distribution utility (Hydro One for most of Renfrew County) before interconnection. Net metering — where excess solar generation is credited against your electricity consumption — is available in Ontario under the Ontario Energy Board's net metering framework.

All solar installation electrical work must be performed by a licensed electrician. The ESA inspection is a prerequisite for utility approval and energization. Do not engage solar installers who propose to skip the permit and inspection process.

Heat Pump Electrical Work

Air source and ground source heat pumps have significant electrical requirements. Most heat pump systems require a dedicated circuit, and in many Renfrew County homes, the existing panel must be upgraded to accommodate the additional load. The major federal and provincial heat pump rebate programs — including the Oil to Heat Pump Affordability Program (OHPA) and the Canada Greener Homes Loan — specifically require that all electrical work be performed by a licensed electrician with an ESA permit and inspection. This is a condition of eligibility, not a suggestion.

Can Homeowners Do Their Own Electrical Work in Ontario?

Ontario's Electricity Act permits homeowners to perform limited electrical work in their own primary residence without holding a contractor licence. However, this permission is narrowly scoped:

• The homeowner must be the registered owner of the property and must occupy it as a primary residence
• An ESA permit is still required and must be obtained before work begins
• The completed work must pass an ESA inspection
• Main panel work, work in rental properties, and commercial work cannot be self-performed by homeowners

In practice, for panel upgrades, new service installation, EV chargers, and any energy efficiency-related electrical work (where grant eligibility often requires a licensed contractor), hiring a 309A or 309C electrician is the correct approach.

How to Verify an Electrician's ESA Licence

Before hiring an electrician in Renfrew County:

1. Search the Skilled Trades Ontario public registry at skilledtradesontario.ca to confirm the individual holds a valid 309A or 309C certificate of qualification
2. Search the ESA contractor database at esasafe.com to confirm the contracting company holds a valid ESA electrical contractor licence
3. Ask the electrician for their ESA contractor licence number before signing any contract
4. Confirm they will pull the permit in their name and arrange the ESA inspection — this is their legal obligation, not yours

A licensed electrician will not hesitate to provide their licence numbers or confirm the permit and inspection process. Reluctance to discuss permits is a significant red flag.

Area Coverage

This guide covers electrical work regulations and considerations for homeowners across Pembroke, Petawawa, Renfrew, Arnprior, Deep River, and Smiths Falls, as well as the surrounding townships of Renfrew County. Hydro One serves most of the region — contact them for utility-side service upgrade coordination and net metering applications.

Frequently Asked Questions