Published August 17, 2026 by National Electric NM
An electrical burning smell is often described as hot plastic or fish. Sparks, scorch marks, or a buzzing sound at an outlet are the same warning. Act on it immediately.
Steps to take
- If you see flames or smoke, get everyone out and call 911.
- If it is safe, switch off the breaker for that circuit. If you are unsure which, turn off the main breaker.
- Unplug devices from the affected outlet only after the power is off.
- Do not use the outlet or circuit again until it has been inspected.
- Call an emergency electrician.
Common causes
Loose connections are the leading cause. As a connection loosens, resistance rises and the spot heats up, eventually melting insulation and the device. Other causes include overloaded circuits, worn outlets that no longer grip plugs, damaged cords, and aluminum wiring connections.
Is a small spark normal?
A tiny blue spark when plugging in a running appliance can be normal. Yellow or white sparks, sparks that linger, sparks every time, or any accompanying smell, smoke, or scorch marks are not.
After the emergency
Most cases end with a straightforward electrical repair: replacing the damaged outlet and any heat-damaged wire, and checking the other devices on the circuit. If the outlet was simply worn out, it is a good time to consider new outlets elsewhere in the house.