Can I Use an Indoor Extension Cord Permanently?

Extension cords are sold and marketed as temporary solutions — and the Ontario Electrical Safety Code (OESC) treats them that way. Using an indoor extension cord as a permanent wiring method is a code violation, a fire hazard, and an insurance risk. Understanding what “permanent” means in this context, and why the distinction matters, helps homeowners make correct decisions about their electrical setup.

Can I Use an Indoor Extension Cord Permanently?

The short answer is no. Extension cords are not approved for permanent use under the OESC, regardless of how heavy-duty the cord is, how it is routed, or whether it is plugged into a properly rated outlet. The OESC requires that permanently installed wiring use approved wiring methods — NMD-90 cable, conduit, or other approved systems — not extension cords or power bars.

The Correct Solution: Add Properly Permitted Outlets

In every case where a homeowner has been using an extension cord permanently, the correct solution is to have an ESA-licensed electrician add a properly permitted outlet or outlets at the location where power is needed.

Contact Us

Need additional outlets added to eliminate permanent extension cord use? Our ESA-licensed electricians serve the GTA. Call us at 416-838-9006.

Amir Azimipour

Electrician Since 2008 Journeyman Electrician Designated Master Electrician at EZSMART Corp