
If you're travelling to London, you'll need to know what type of plug to pack. London uses Type G plugs, which have three rectangular pins in a triangular pattern. The standard voltage in London is 230V, and the frequency is 50Hz. If you're travelling from a country with a different voltage, you may need a voltage converter or transformer, as well as a travel adapter. It's important to check the voltage information on the plug of the appliance you'll be plugging in.
| Characteristics | Values |
|---|---|
| Plug Type | G |
| Number of pins | 3 |
| Pin shape | Rectangular |
| Pin arrangement | Triangular |
| Grounded | Yes |
| Voltage | 230V |
| Frequency | 50Hz |
| Plug adapter needed for US | Yes |
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What You'll Learn

Type G plugs are used in London
If you are travelling to London, you will need to use a travel adapter to plug in any electrical appliances. This is because the plug shape in London is different from other countries. You can buy travel adapters online or at major airports.
It is important to note that travel adapters do not convert voltage. If you are plugging in appliances that are rated below 220V, you will need a voltage converter to avoid damaging your appliances or causing electrical hazards. Most voltage converters come with plug adapters, so you may not need to buy a separate travel adapter.
Dual-voltage devices can switch between 110/120V and 220/240V, so you will not need a converter or transformer, just a travel adapter. You can determine whether you need a converter or adapter by checking the appliance's rating plate.
UK power sockets have a switch to control the power supply, so make sure this is turned on when charging your appliances.
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US to UK travel adapters are available
If you're travelling to London, you'll need to know what type of plug to pack. London uses Type G power plugs, which are very different from US plugs, so you will definitely need a travel adapter. Type G plugs have three rectangular pins in a triangular pattern and are considered the safest of all the kinds of sockets in the world.
Adapters do not convert voltage, so if your device runs on a lower voltage than the UK average of 230V, you may also need a converter to stop it from overheating. Most voltage converters come supplied with plug adapters, so you may not need to buy a separate travel adapter. You can check if your device needs a converter by looking at the tiny print on the plug. If your device is dual-voltage rated, it will say something like 'INPUT: 110-240V'.
There are also universal adapters that will work in London and over 100 other countries. These are a good option if you're visiting multiple countries or aren't sure of your future travel plans.
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UK sockets have an on/off switch
In the UK, including London, sockets have an average voltage of 230v. Unlike the sockets in many other countries, UK sockets have a switch that controls the power supply. This means you can turn the power supply on and off at the wall socket. This is particularly useful for turning off power to portable heaters and cooking appliances, as it is safer than simply turning off the appliance. It is also a handy way to switch off an appliance without having to unplug it.
UK sockets are designed to fit three-pin plugs. If you are travelling to the UK from a country that uses a different type of plug, you will need to buy an adapter. Adapters are easy to find and can be purchased at the airport or high street shops.
If your country uses a lower voltage than the UK average of 230v, you may also need a converter to stop your devices from overheating. Most computers, phones, MP3 players, laptops, and camera chargers are compatible with 230v power sources. However, it is important to check that any appliances you use are rated for up to 230v/240v to avoid damaging them or tripping the fuse.
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UK voltage is 230V
In the UK, including London, the voltage is 230V at 50Hz. This has been the nominal voltage since 2003, when it was harmonised with the voltage in the rest of Europe. Previously, the UK voltage was 240V, and this higher voltage is still commonly used, with the actual voltage fluctuating between 236V and 242V.
If you are travelling to London from a country with a lower voltage, you will need to buy an adapter to fit your plug into the UK's three-pin sockets. You may also need a voltage converter to prevent your device from overheating. Modern devices are often rated for 100-240V, however, so they can be used anywhere.
Voltage harmonisation was intended to ensure that products bought in one European country would work in another. The new tolerance values of 230V +/-10% were chosen to cover the existing supply voltages in Europe, which were 220V in most countries and 240V in the UK. This change was more of a "change in the label" than an actual change in the supply.
Manufacturers have started designing devices according to the new 230V nominal voltage, but 220V and 240V devices can still be found. Devices with a nominal voltage of 230V will work fine in the UK, but if you are buying a new device specifically for use in London, it is ideal to get one with a nominal voltage of 230V.
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You may need a voltage converter
If you are travelling to London, you will need to ensure that you can use your electrical appliances safely. London uses Type G power outlets, which feature three rectangular pins in a triangular pattern. The standard voltage in London is 230V at a frequency of 50Hz.
If your home country uses a different voltage, you may need a voltage converter to use your electrical appliances safely in London. Using an electrical appliance with the wrong voltage can be extremely dangerous and may damage your appliance, trip the fuse, or even cause a fire.
Adapters are easy to find and can be purchased online, at most major airports, or in high-street shops. However, adapters do not convert voltage, so if your appliance is not compatible with the voltage in London, you will need a voltage converter in addition to an adapter.
You can determine whether you need a voltage converter by checking the appliance's rating plate. If your appliance is dual-voltage rated, it will display something like 'INPUT: 110-240V'. In this case, you will not need a converter, as the UK's supply voltage of 230V falls within this range. However, if your appliance is single-voltage rated, it will usually only display the voltage, such as 230V. If your appliance is rated below 220V, you will need a voltage converter to use it safely in the UK.
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Frequently asked questions
London uses Type G power plugs, which have three rectangular pins in a triangular pattern.
London operates on a 230V supply voltage and 50Hz.
If the plug shape in your home country is different from the Type G plug used in London, you will need to get a travel adapter. You can buy one online or at most major airports.
If your electrical appliances are rated between 220 and 240V, you can safely use them in London without a voltage converter. If your appliances are rated below 220V, you will need a converter.











































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