Why does my socket smell of burning plastic when the microwave runs – Advice from Electriman, North London Electricians

## Why Your Socket Smells of Burning Plastic When the Microwave Runs

That burning plastic smell is your home's wiring telling you something is seriously wrong. It is not a minor inconvenience — it is an early warning sign of a potential electrical fire.

### What Is Most Likely Happening

Microwaves draw a large current, typically between **6 and 13 amps**, every time they run. If there is any weakness in the socket's connections, that high current causes the metal terminals to heat up, arc, and char the surrounding plastic. The smell you notice is literally the socket housing beginning to melt or burn.

**Common causes include:**

- **Loose terminal screws** inside the socket — the most frequent cause

- **Backstab (push-in) connections** that have worked loose over time

- A socket that was **undersized, damaged, or poorly installed** originally

- **Old or corroded wiring** that makes poor contact with the terminals

- A socket that has been **overloaded** with an extension lead previously

- The socket being **partially rated** — older 13A sockets can degrade internally

### What You Should Do Right Now

1. **Stop using that socket immediately**

2. **Unplug the microwave**

3. **Switch off the circuit** at your consumer unit (fuse box) — find the breaker labelled kitchen ring or sockets

4. Do NOT remove the socket faceplate yourself unless you are confident and the circuit is confirmed dead with a voltage tester

5. **Call a qua

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Electriman covers Mill Hill, Barnet, Finchley, Edgware, Enfield, Watford and surrounding areas. All work is Part P certified and fully insured.