As a homeowner in Ontario, you don't need to be an electrician, but understanding the basics of the electrical code can save you money, keep you safe, and prevent problems when you sell your home. I'm Sam from City Power Electrical Services (ECRA/ESA #7015314), and here's what you need to know.
Ontario's electrical work is governed by two main documents: the Canadian Electrical Code (CEC), published by the Canadian Standards Association (CSA), and the Ontario Electrical Safety Code (OESC), which is the CEC plus Ontario-specific amendments and requirements. The current edition of the CEC is updated every three years, and Ontario typically adopts it with amendments. The Electrical Safety Authority (ESA) is the regulatory body that enforces these codes in Ontario.
Rule 1: All electrical work requires a permit. In Ontario, essentially all electrical work beyond basic plug-and-play tasks (like changing a light bulb or plugging in an appliance) requires a permit from the ESA. This includes adding or modifying circuits, installing new outlets or switches, replacing a panel, wiring a new room, installing pot lights, adding an EV charger circuit, and any other work that involves modifying the permanent electrical installation. The permit is technically called a "notification" and is filed by your Licensed Electrical Contractor.
Rule 2: Only Licensed Electrical Contractors can do the work. In Ontario, electrical work must be performed by a Licensed Electrical Contractor (LEC) registered with the ESA, with a valid ECRA/ESA licence number. Homeowners are technically allowed to do electrical work on their own home (with a homeowner's permit), but I strongly advise against this for anything beyond the basics. The code is complex, the risks of getting it wrong are serious, and insurance companies may not cover damage from DIY electrical work.
Rule 3: The ESA inspection is mandatory. After the electrical work is complete, the ESA sends an inspector to verify that the work meets code. This inspection is included in the notification fee. If the work passes, you receive a Certificate of Inspection. If it doesn't pass, the deficiencies must be corrected and re-inspected. An ESA inspection is not a formality — inspectors are thorough and they catch real issues.
Now let's cover the most important code requirements that affect homeowners.
AFCI protection. Arc-Fault Circuit Interrupter breakers are designed to detect dangerous electrical arcing (the kind that can start fires) and trip the circuit before a fire starts. The current code requires AFCI protection on circuits supplying receptacles in bedrooms, living rooms, dining rooms, dens, recreation rooms, closets, hallways, and similar dwelling areas. If you're adding or modifying circuits in these areas, AFCI breakers are required. They cost more than standard breakers ($40 to $50 vs $5 to $10) but they provide genuine fire protection.
GFCI protection. Ground Fault Circuit Interrupter outlets or breakers are required wherever water and electricity might interact. The current code requires GFCI protection for all receptacles in bathrooms, all receptacles within 1.5 metres of a sink (including kitchen countertop receptacles), all outdoor receptacles, garage receptacles, unfinished basement receptacles, and all receptacles near pools, hot tubs, and other water features. GFCI protection prevents electrocution by detecting tiny current leaks to ground and tripping within milliseconds.
Tamper-resistant receptacles. All receptacles installed in new work or replacements in dwelling units must be tamper-resistant (TR). These have internal shutters that prevent children from inserting objects into the outlet. They're now standard on all new outlets sold in Canada, so this requirement is mostly automatic.
Smoke and carbon monoxide alarms. The Ontario Building Code requires hardwired smoke alarms with battery backup on every storey of a home and outside every sleeping area. Carbon monoxide alarms are required on every storey that has a sleeping area if the home has a fuel-burning appliance, an attached garage, or a fireplace. These must be hardwired and interconnected in new installations.
Kitchen circuit requirements. A modern kitchen requires a minimum of two 20-amp small appliance circuits serving the countertop receptacles, a dedicated circuit for the refrigerator, a dedicated circuit for the dishwasher, a dedicated circuit for the range or oven, and a dedicated circuit for the microwave if it's hardwired or a high-draw built-in. If you're renovating a kitchen in a pre-1980 home, you may find the kitchen running on a single 15-amp circuit shared with other rooms — a code and safety nightmare for modern kitchens.
Bathroom circuit requirements. Each bathroom requires at least one 20-amp circuit. Bathroom receptacles must be GFCI-protected. The bathroom fan and lighting can be on the same circuit as the receptacle in a bathroom, but many electricians put them on separate circuits for convenience.
Panel requirements. The code specifies minimum clearances around electrical panels: at least 1 metre of clear working space in front of the panel, and the panel must be readily accessible (not hidden behind furniture or in a tight closet). I often find panels in GTA homes that violate these clearance requirements — closets packed with storage, shelving installed right in front of the panel, or panels located behind finished walls.
Common code violations I find in GTA homes. Open junction boxes (all splices must be in accessible, covered junction boxes). Missing box covers. Overcrowded boxes (too many wires for the box size). Incorrect wire gauge for the breaker size. Missing bonding jumpers on water heaters and gas lines. Extension cords used as permanent wiring. Double-tapped breakers. Missing GFCI protection in required locations.
What happens if you do work without a permit? You may face fines from the ESA. Your home insurance could deny claims related to the electrical work. You may be required to have the work inspected (and corrected) when you sell the home. The work may not meet code and could be dangerous.
If you're unsure whether your home meets current electrical codes or you're planning a renovation, call City Power Electrical Services at 416-877-3048. I can do a thorough inspection and let you know where your home stands — and fix anything that needs attention.