In the UK, the power sockets in a house are connected by means of
ring circuits, which are protected by 32 A circuit breakers. This type of wiring is rarely used outside the UK and requires the use of
fused plugs. Small appliances, like mobile phone chargers, usually have a 3 A cartridge fuse inside the plug; heavy duty appliances, such as coffee makers, have a plug with a 13 amp cartridge fuse. Almost everywhere else in the world
radial circuits are used. In this system each wall socket, or group of sockets, has a circuit breaker at the main switchboard, so there is no need for plugs to be fused. As a result, if you take some foreign appliance to the UK, you can use an adaptor, but technically it must incorporate the correct value fuse. Most would have a 13 amps one, too big for computers for example.
British Standard BS 1363 requires use of a three-wire grounded and fused plug for all connections to the power mains. Two-wire class II appliances are not earthed and often have a plastic grounding pin which only serves to open the shutters of the outlet.
Type G is mainly used in the United Kingdom, Ireland, Cyprus, Malta, Malaysia, Singapore and Hong Kong.
https://www.worldstandards.eu/electricity/plugs-and-sockets/g/
We use A fuse box with a dedicated auto/load related fuses to each area of the house, also a safety cut out circuit breaker in case of overloads.
