Can I run an extension cord to my garage permanently?

No, you should not use an extension cord as a permanent solution to power your garage. Extension cords are designed for temporary use only, and permanent installation violates the Ontario Electrical Safety Code and creates serious safety hazards.

Why Extension Cords Aren't Safe for Permanent Use

Extension cords lack the proper protection and installation methods required for permanent wiring. They're not designed to handle continuous loads or weather exposure, and they create fire and electrocution risks when used long-term. The cord connections can loosen over time, creating arcing and heat buildup. Additionally, most extension cords aren't rated for outdoor use or the temperature variations they'd experience running to a garage.

In Ontario, the Ontario Electrical Safety Code requires proper wiring methods for permanent installations. This means running appropriate cable (like NMWU for underground or ACWU for overhead) through proper conduit or burial methods. Any permanent circuit to your garage requires an ESA permit and inspection to ensure it meets code requirements for safety and insurance purposes.

Proper Solutions for Garage Power

The correct approach is installing a dedicated circuit to your garage using proper electrical methods. For a detached garage, this typically involves either underground cable (buried at least 600mm deep in conduit) or overhead service with appropriate clearances. The circuit should be protected by a GFCI breaker and properly grounded. Most garages benefit from a 20-amp circuit minimum, though 30-amp circuits are common for workshops with power tools.

If you need temporary power while planning the permanent installation, use a heavy-duty outdoor extension cord rated for the load, but only for short-term use. Unplug it when not in use and never leave it connected permanently.

ESA Requirements and Next Steps

Installing a permanent circuit to your garage requires an ESA permit, which means the work must be done by a licensed electrician. The typical cost for a dedicated garage circuit in Ottawa ranges from $800 to $2,000, depending on the distance, whether it's underground or overhead, and the amperage required. This includes the permit, proper cable, GFCI protection, and ESA inspection.

For a free assessment of your garage power needs and a quote on proper installation, contact Electrical Ottawa. We'll ensure your garage power meets all ESA requirements and provides safe, reliable electricity for years to come.

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Find a Licensed Electrician

Electrical Ottawa connects you with vetted, ESA-licensed electricians from the Ottawa Construction Network:Ottawa Electrical Contractors:

• Ring Electric Inc.
• Floodlight Electric
• Home Town Electrical Services