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AhaBulb: Stuff Everyone Should Know · ahabulb.com/extension-cord-rug

What is the main fire hazard of running an extension cord under a rug?

Never hide an extension cord under a rug: trapped heat can start a fire.

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  1. The rug makes the cord use more electricity
  2. The cord cannot release heat and could start a fire ✔
  3. The cord stops working whenever it is hidden

Why: Covering an extension cord traps heat, which can start a fire. Extension cords are temporary, not permanent wiring. If you rely on them, have more outlets installed.

Huh, didn't know that: Heavy reliance on extension cords can mean you need more outlets.

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References

Answer: The cord cannot release heat and could start a fire. Covering an extension cord traps heat, which can start a fire. Extension cords are temporary, not permanent wiring. If you rely on them, have more outlets installed.

  1. CPSC: Extension Cord Safety www.cpsc.gov/Newsroom/News-Releases/1999/CPSC-Warns-Consumers-About-Faulty-Extension-Cords-Power-Strips-and-Surge-Protectors
    If the cord is covered, heat cannot escape, which can result in fire.
    Checked 2026-10-09.
  2. Electrical Safety Foundation International: Extension Cord Safety Tips www.esfi.org/extension-cord-safety-tips
    Heavy reliance on extension cords is an indication that you have too few outlets to address your needs. Have additional outlets installed where you need them.
    Checked 2026-10-09.

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