EZSMART Corporation, ESA/ECRA #7012690 , North York , Ontario
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Two-prong outlets throughout a Toronto or GTA home are the giveaway: the wiring predates the grounding conductor that modern circuits carry as standard. Homeowners often ask whether they can simply add a ground somehow, or whether a full rewire is the only fix. There are real, code-compliant middle paths. This guide covers exactly how grounding works in an older home and what your realistic options are.
There is no shortcut that magically adds a true ground to a two-wire circuit without running a conductor back to the panel. Your two code-compliant options in Ontario are: run a new grounded circuit (new cable with a ground conductor, the permanent fix), or install a GFCI receptacle labelled “No Equipment Ground” on the existing two-wire circuit, which restores shock protection without a true ground path. Both require an ECRA/ESA-licensed contractor and an ESA notification for anything beyond a straight device swap.
The ground conductor gives fault current a low-resistance path back to the panel so a breaker trips quickly when a hot wire touches a metal appliance chassis. Without it, a fault can energize the chassis of a washing machine, a laptop, or a lamp without tripping anything, waiting for a person to become the path to ground instead. Grounding does not prevent faults; it makes sure faults are caught fast.
The permanent, fully code-compliant fix. A licensed contractor runs new NMD90 cable with a bare ground conductor from the panel to the device, replacing the old two-wire run entirely.
The Ontario Electrical Safety Code allows a GFCI receptacle to be installed on an existing two-wire circuit without a ground conductor, provided the device is labelled “No Equipment Ground” and any downstream receptacles fed from its LOAD terminals carry the same label plus a “GFCI Protected” sticker.
Related: how to change a 2-prong outlet to a 3-prong outlet.
An all-two-prong, ungrounded home is a common finding on Ontario pre-purchase inspections. GFCI retrofitting with proper labelling is generally accepted by insurers and inspectors as a reasonable interim safety measure, while a documented plan to eventually run grounded circuits room by room satisfies most buyers’ concerns without a five-figure rewire before closing.
When a GTA homeowner calls about an ungrounded house, we do not default to quoting a full rewire. We start with the panel: verify the bonding and grounding electrode are correct, then GFCI-protect every wet-area and high-risk circuit that same visit. That gets the home to a genuinely safer state in one afternoon. The full grounded rewire then becomes a planned project done room by room as budget allows, not an emergency. Do not let “the whole house needs rewiring” stop you from taking the cheap, fast safety step available today.
For shock protection, yes, it trips on the same fault conditions. For surge protection and grounded electronics, no, there is still no true ground reference.
No. Informal pipe grounding is unreliable and not a licensed contractor’s standard practice on modern plumbing.
No. Prioritizing GFCI retrofits now and grounded rewiring room by room over time is a common, accepted approach.
A plug-in outlet tester shows an open ground instantly. See how to use an outlet tester.
Original wiring installed to the code of its era is generally grandfathered, but any new work must meet the current OESC.
Living with an ungrounded Toronto or GTA home and want a real plan? Call ezsmart at 416-838-9006 or use our contact page. An ESA-licensed electrician will prioritize GFCI protection now and quote a grounded rewire path for later.
Electrician Since 2008 Journeyman Electrician Designated Master Electrician at EZSMART Corp
