How Do You Ground an Older Home That Has No Ground Wires?

How Do You Ground an Older Home That Has No Ground Wires?

Older Ontario homes wired with two-wire circuits (hot and neutral only, no ground conductor) can be brought up to acceptable safety standards using GFCI protection. The Ontario Electrical Safety Code and the Canadian Electrical Code permit the use of GFCI-protected outlets as an alternative to rewiring when grounding conductors are absent. A GFCI breaker or GFCI outlet at the first position in the circuit provides ground-fault protection for all downstream outlets, even without a ground wire present.

GFCI as an Accepted Alternative

When a GFCI device is used in place of grounding, each ungrounded outlet must be labeled “No Equipment Ground” — labels are typically included with GFCI devices. The GFCI protects against ground faults by detecting current imbalance between hot and neutral, which provides protection equivalent to a grounded circuit for shock hazard purposes. However, it does not provide an equipment ground for sensitive electronics or for appliances that depend on the ground for surge suppression.

When Full Rewiring Is Needed

• Circuits serving kitchen countertops, bathrooms, laundry, and garages — these require dedicated grounded circuits by code
• Circuits for computers, home theatre equipment, or other sensitive electronics where a true equipment ground is needed
• When aluminum wiring or knob-and-tube wiring is present — GFCI alone does not address these hazards
• When the panel is undersized (60-amp fuse panel) and a full upgrade is already warranted

EZSMART assesses older home electrical systems across Ontario and recommends the right level of upgrade — from targeted GFCI installation to full rewiring. Contact us for an assessment.

Amir Azimipour

Electrician Since 2008 Journeyman Electrician Designated Master Electrician at EZSMART Corp