Science & Tech · Gadgets & EVs · 3 hrs ago
Why extension cords should not become permanent wiring
Extension cords are meant for temporary use, not as permanent wiring in a home.
Safety groups warn that cords used continuously can become damaged, especially if trapped behind furniture or covered.
Damage, poor ventilation and a load the cord cannot handle can lead to overheating and fire.
U.S. electrical rules also restrict using flexible cords in place of fixed wiring or running them where they could be damaged.
Major appliances should be plugged directly into wall outlets, and portable heaters should never use an extension cord or power strip.
For a home office or other ongoing need, adding an outlet may be a safer permanent solution.
Loudoun County Fire and Rescue linked a July 2026 house fire in Virginia to an electrical failure of an extension cord; five occupants were displaced.
Extension cords are designed for temporary use and should not replace a building’s fixed wiring, according to the Electrical Safety Foundation International.
Continuous use can leave cords hidden, damaged or powering equipment they were not suited to handle.
The National Electrical Code bars flexible cords from replacing fixed wiring and restricts where they can be run.
Extension cords can overheat and cause fires, especially if covered, damaged or used with high-load appliances.
Loudoun County Fire and Rescue attributed a July 2026 house fire in Virginia to an extension cord’s electrical failure.
- Who
- The Electrical Safety Foundation International and the National Electrical Code provide guidance on extension cords.
- What
- The story explains why extension cords should not be used as permanent wiring and outlines the risks of continuous use.
- When
- The article was published on October 12, 2026. It also cites a house fire in July 2026.
- Where
- The guidance concerns the United States; the cited fire occurred in Virginia.
- Why
- Cords can be damaged, overloaded or overheat, creating a fire risk.
This story does not have two clearly opposing sides.
Never use an extension cord or power strip.
Loudoun County Fire and Rescue attributed a house fire in Virginia to the electrical failure of an extension cord.
Engadget published its article about the risks of leaving extension cords plugged in continuously.
- NEC section
- Section 400.12 says flexible cords and cord sets should not replace a structure’s fixed wiring.
- Temporary-installation limit
- The NEC sets a 90-day limit for holiday decorative lighting and similar purposes.
- Workplace rule of thumb
- MEMIC recommends considering a permanent solution if equipment has used an extension cord for over 30 days.
- Virginia fire
- Loudoun County Fire and Rescue attributed a July 2026 house fire to an extension cord’s electrical failure.
- People displaced
- Five occupants were displaced by the fire.
Sources
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