Burning smell coming from an outlet

Symptoms

• Distinct burning plastic or electrical smell near an outlet
• Smell gets stronger when something is plugged in
• Outlet may also feel warm or show discoloration

Likely causes

• CommonA loose wire connection overheatingLoose connections create resistance and heat, which can melt insulation and produce a burning smell.
• CommonAn overloaded circuitToo much load can overheat the outlet and wiring insulation.
• PossibleA failing or damaged outletInternal damage or age can cause an outlet to overheat even under normal loads.
• PossibleA damaged appliance cord plugged into itSometimes the smell is coming from the cord or appliance, not the outlet itself.
• Less commonRodent damage to wiring behind the wallChewed insulation can short and overheat inside the wall.

What to do

1. Unplug anything connected to that outlet immediately.
2. Turn off the breaker for that circuit at the panel right away.
3. Do not touch the outlet or try to remove the cover plate while it may still be hot.
4. Check whether the smell was actually coming from a plugged-in appliance or cord instead of the outlet itself.
5. Ventilate the room and keep the area clear until it's inspected.
6. Leave the breaker off until a licensed electrician can check the outlet and wiring.
7. Do not re-energize that circuit just to 'see if it's fine' after a burning smell.

When to call a pro

Call a licensed electrician immediately any time you smell burning from an outlet, even if it stops after unplugging something.

Safety