Burning Smell From A Socket

You can smell burning coming from a plug socket — a sign of potential electrical fire.

£80 – £200Emergency

What is this?

A burning smell from a socket is one of the most serious warning signs in domestic electrics. It means something inside or behind the socket is overheating — typically a loose connection, worn contacts, or damaged wiring. The heat generated by a poor connection can be intense enough to melt plastic, char wiring insulation, and ignite surrounding materials. This is how many domestic electrical fires start.

Common causes

Loose terminal connections at the back of the socket generating heat through resistance
Worn internal spring contacts causing arcing when a plug is inserted
Overloaded socket or adaptor drawing more current than the socket is rated for
Damaged cable insulation behind the socket causing short circuit or arcing
Backstab (push-fit) connections degrading over time
Water or moisture ingress causing tracking across the socket face

Is it dangerous?

This is an emergency. A burning smell from a socket means excessive heat is already being generated. Stop using the socket immediately. Unplug everything from it carefully — if the socket is hot or the plug is stuck, turn off the circuit at the consumer unit first. Do not pour water on it. If you see flames or heavy smoke, call 999 and evacuate.

Can I fix it myself?

No. Immediately stop using the socket. Unplug all devices from it. If you can safely do so, turn off the MCB or RCD for that circuit at the consumer unit. Do not attempt to remove the socket faceplate or investigate behind it. Call an electrician as an emergency.

When to call an electrician

Call an emergency electrician immediately. A burning smell from a socket is never something that can wait. If the socket is visibly damaged, discoloured, or you can see smoke, also consider calling 999 if there is any doubt about fire risk. Every minute matters.

What will an electrician do?

Isolate the circuit and safely remove the socket faceplate

Inspect the wiring and terminal connections for signs of overheating, arcing, and damage

Replace the socket outlet with a new one

Repair or replace any damaged cabling behind the socket

Check the ring circuit continuity and insulation resistance

Inspect adjacent sockets on the same circuit for similar problems

Typical cost

£80 – £200

Emergency callout rates may apply outside normal hours, typically adding £30–£80. Replacing a socket is quick but cable repairs behind the wall increase the cost.

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Sources & References

Frequently Asked Questions

What should I do if I smell burning from a socket?

Stop using the socket immediately. Unplug everything from it. Turn off the circuit at the consumer unit if you can safely identify it. Call an emergency electrician. If you see flames or heavy smoke, call 999.

Can I still use other sockets while waiting for the electrician?

You can use sockets on other circuits, but avoid the circuit with the burning socket. If you are unsure which sockets are on the same circuit, limit your usage to essentials only.

What causes a socket to smell like burning?

The most common cause is a loose connection generating heat through electrical resistance. As the connection gets hotter, it degrades further, creating a cycle that gets worse over time. This is why it is an emergency.

Could it be the appliance rather than the socket?

It is possible that a faulty plug or appliance is the source. If you have safely unplugged the appliance and the smell stops, the appliance may be at fault. However, an electrician should still check the socket for damage.

How do I prevent this happening?

Avoid overloading sockets with adaptors. Have an EICR carried out every 10 years (every 5 years for rental properties) to check all connections. Never ignore sockets that feel warm, make noise, or have visible damage.

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