What plug is used in Serbia?

If you moved here from the UK, Ireland or North America, this is the first thing you notice. Serbia runs 230 V at 50 Hz on type F sockets, so a European plug fits and a British or American one does not.

What the side clips are for

The name comes from the German Schutzkontakt, meaning protective contact. Those two metal strips along the top and bottom of the socket are the earth connection.

They are deliberately longer than the pins. When you push a plug in, earth connects first and disconnects last, so the appliance is earthed the whole time voltage is present on it. That detail is the entire point of the design.

What actually matters in an older flat

The socket can look modern and still not be earthed. Flats built before the mid-eighties were often wired with two conductors only, and over the years people swapped the old sockets for new ones with clips without pulling a third wire.

From the outside it is identical to a working one. Anything plugged into it is simply not earthed, and nothing tells you. That is why we measure rather than judge by appearance, as described under earthing.

The same applies to a socket that feels loose or looks brown around the pin holes. Both are signs of a joint that has been overheating, and there is a short routine for checking that yourself in how to test an outlet.

Adapters and travel

A simple adapter is fine for anything whose power supply is marked 100–240 V, which covers phone chargers, laptops and most modern electronics.

It is not fine for anything that heats or has a motor. A kettle or hair dryer built for 110 V will not work correctly here, and a cheap adapter carrying that load is a fire risk in its own right.

Two-pin plugs without earth clips fit and work, but they carry no earth. For a washing machine, a dishwasher or anything metal in a bathroom, that matters.

When to replace one

Burn marks, a loose face, a plug that falls out, or no earth in a kitchen or bathroom. Replacement takes minutes, but the point is finding out why it failed, which is what socket replacement actually covers.