Tamper Resistant Receptacles Ontario

The rule applies to new work, renovations, and many dwelling-style spaces

The Ontario Electrical Safety Code, based on the Canadian Electrical Code with Ontario amendments, requires tamper resistant receptacles in common dwelling-unit situations and similar occupancies where children may reasonably have access. In plain language: if you are adding or replacing receptacles in a house, condo, apartment, finished basement, secondary suite, or childcare-like space, the receptacle usually needs to be a TR type unless a recognized exception applies.

A tamper resistant receptacle looks like a normal outlet, but the slots have internal spring-loaded shutters. The shutters open only when equal pressure is applied to both blade openings at the same time, as happens when a proper plug is inserted. A key, paper clip, hairpin, toy part, or one side of a broken plug should not open one slot by itself. That is the child-shock risk the rule is designed to reduce.

TR requirements matter most when work is being inspected: a basement finish, kitchen renovation, addition, child care area, rental unit repair, or whole-home device refresh. A simple like-for-like outlet replacement may be treated differently from a larger renovation, but once new wiring, new boxes, new circuits, or layout changes are involved, it is no longer just a cosmetic swap. If the work requires an ESA notification, the inspector can check the receptacle type along with grounding, polarity, box fill, AFCI/GFCI protection, and cover plates.

City Power Electrical Services installs tamper resistant receptacles as a Licensed Electrical Contractor, ECRA/ESA #7015314. We install and replace receptacles through our switches and outlets service, and every job is permitted with the ESA where required and inspected.

What the code requires in practice

A TR receptacle must still be the correct electrical device for the circuit. The “TR” feature does not replace grounding, GFCI protection, AFCI protection, weatherproofing, or proper box installation.

In a typical Ontario home, the practical checklist is:

• Use CSA-certified 15A or 20A receptacles that match the circuit rating and wiring method.
• Choose receptacles marked “TR” on the face or body where the Code calls for tamper resistance.
• Keep GFCI protection where required, such as bathrooms, kitchen counter areas, laundry areas, garages, outdoors, and other wet or damp locations.
• Keep AFCI protection where the current OESC requires it for dwelling branch circuits; see our guide to AFCI requirements in Ontario for that separate rule.
• Use weather-resistant and in-use covers outdoors; TR alone is not an outdoor rating.
• Use approved methods for aluminum wiring. Do not put a standard copper-only receptacle directly on aluminum conductors.
• Maintain proper bonding, box support, conductor length, device screws, and cover plates.

You can usually identify a tamper resistant receptacle by the small “TR” stamped or moulded into the face. It may be near the two vertical slots, near the centre screw, or on the lower face depending on the manufacturer. You may also see plastic shutters behind the blade openings. Do not rely on colour, Decora style, or a “child safe” marketing label unless the device is certified and marked as tamper resistant.

Combination devices need the same attention. A USB-C receptacle, GFCI receptacle, smart receptacle, floor receptacle, or pop-up counter receptacle may still need to be TR if it provides a standard 125V, 15A or 20A plug face in a location covered by the rule. Specialty options for safer Ontario outlets — GFCI, USB-C combo receptacles, smart dimmers, timers — usually cost $120–$250 installed, depending on the device. A standard tamper resistant outlet or switch swap is typically $80–$120 per device, with volume pricing available for whole-home updates.

Common mistakes are easy for an inspector to spot

The most common mistake is assuming plastic plug caps satisfy the rule. They do not. Plug caps are removable accessories. A tamper resistant receptacle is a certified wiring device with internal shutters built into the outlet.

The second common mistake is replacing only the visible broken outlets and leaving ordinary receptacles in the same renovated room. If the project is a finished basement, nursery, rental suite, kitchen, or child care space, inconsistent devices draw attention because the inspector can see which receptacles are new, which are old, and whether the scope of work was properly upgraded.

Other problems we often see include:

• Ordinary non-TR receptacles installed because they were cheaper or already in a toolbox.
• Reversed hot and neutral conductors, especially after DIY device swaps.
• Open grounds hidden behind three-slot receptacles.
• “Bootleg” grounds tied to neutral, which is unsafe and not code-compliant.
• Backstabbed terminations that loosen, heat up, or fail under load.
• Broken tabs on split receptacles replaced incorrectly, especially in older kitchens.
• Oversized devices crammed into shallow boxes, leaving poor conductor space.
• Missing blank plates or loose cover plates that leave energized parts accessible.
• Outdoor TR receptacles installed without weather-resistant devices, gasketed covers, or proper in-use covers.

If a receptacle feels unusually hard to plug into, it may be a cheap or damaged TR device, or the plug may not be going in squarely. That is not a reason to install a non-TR outlet. A better-quality certified TR receptacle, installed flush and level in the box, normally solves the problem.

TR outlets also do not fix old wiring by themselves. If the box has no bonding conductor, if the cable is brittle, if knob-and-tube is active, or if aluminum connections are not remediated correctly, the receptacle face is only one part of the compliance issue.

Inspection, sale, and claim timing is when documentation matters

ESA does not issue a special “TR receptacle certificate.” The documentation that matters is the ESA notification and the final Certificate of Acceptance when electrical work requiring notification is inspected and accepted. For the bigger permit path, see our ESA notification process guide and our explanation of the ESA Certificate of Acceptance in Ontario.

During an ESA inspection, the inspector may check that receptacles are certified, tamper resistant where required, properly bonded, correctly polarized, protected by GFCI or AFCI where required, and installed in suitable boxes with covers. For a basement apartment, the receptacles are only one part of the electrical review; smoke/CO alarms, kitchen circuits, laundry loads, panel capacity, and separation between units may also matter. If that is your project, start with basement apartment electrical requirements in Ontario.

At sale time, a home inspector may flag non-TR receptacles in renovated child-accessible areas, especially if the finish looks recent. The issue is usually not that every old outlet in an untouched older home must be replaced overnight. The issue is whether recent electrical work was done to the Code in force when it was performed and whether there is ESA paperwork for work that required notification.

For landlords, the Residential Tenancies Act requires rental premises to be maintained in a good state of repair and fit for habitation. For condos, the Condominium Act and corporation rules may require approval before changing electrical devices that affect common elements, shared walls, or building systems. For insurance, the larger concern is usually unpermitted or unsafe electrical work, not the letters “TR” by themselves.

What to do next is a room-by-room compliance check

Start by checking the receptacle faces in bedrooms, living areas, hallways, kitchens, finished basements, playrooms, rental suites, and any child care or child-accessible space. Look for the “TR” marking. Then check whether the location also needs GFCI, AFCI, weather-resistant construction, or a dedicated circuit.

If you are only replacing a damaged outlet, the safest approach is still to install the correct TR device for that location. If you are renovating, adding receptacles, finishing a basement, converting space for rental use, or opening walls, plan the work as a permitted electrical project from the start. That avoids rework after drywall and avoids an inspection failure over devices that should have been selected before finishing.

City Power provides free written estimates, full cleanup, and 24/7 emergency service across Toronto and the GTA. Founded and run by Sam, a licensed electrician with fifteen-plus years in the trade, we can replace individual outlets, refresh whole rooms, or coordinate receptacles as part of a larger permitted renovation. Call 416-837-4038 or request a written quote before the walls close.