Extension cords are genuinely useful. Need to plug in a lamp across the room while you rearrange furniture? Perfect. Running power to a tool in the garage for an afternoon? Great. That’s exactly what they’re built for.
But here’s the thing almost nobody tells you: they’re designed for temporary use only. Not semi-permanent. Not “until I get around to fixing it.” Temporary. The Missouri Department of Labor puts it plainly — extension cords should never act as permanent wiring, and hard-wired outlets should replace them whenever a long-term power source is needed.
There’s even a time limit baked into some safety guidelines. According to the Office of Compliance, temporary wiring like extension cords has a 90-day limit in regulated settings like construction sites — after that, it’s not supposed to still be in use. That same principle applies to how safety experts think about long-term extension cord use in homes: if it’s been months, it’s no longer truly temporary.
Ninety days. Most people’s “temporary” cords have been sitting in the same spot for years.
Why does it matter? Because extension cords weren’t engineered to handle the constant load of being your main power source. Over time, they can overheat. The insulation wears down. If they’re run under rugs or furniture — which squishes and damages the cord — heat builds up with nowhere to go. That heat can arc, meaning electricity literally jumps through air or damaged insulation, and that can start a fire inside your wall or under your flooring where you’d never see it coming.
So what do you actually do instead? If you genuinely don’t have enough outlets where you need them, that’s a job for a licensed electrician to add proper hard-wired outlets. It costs money, yeah — but it’s the real fix. In the meantime, a power strip with a surge protector is a better short-term option than a long extension cord snaking across a room — just don’t plug one power strip into another (called daisy-chaining), which creates the same overload risk. And even power strips aren’t meant to be a forever solution.
If you’re renting, this is worth bringing up with your landlord. Not enough outlets in your apartment is a legitimate maintenance issue, not just an inconvenience.
The cord running behind your TV stand has probably been fine so far. But “fine so far” isn’t the same as safe.