Double socket outlets are the most common power point in UK homes, letting you plug in two appliances at one location and cutting down on extension leads. Here is how they work, what they can safely handle, and where to use them.

What is a double socket outlet?

A double socket has two plug receptacles on one wall plate, both wired to the same supply circuit. UK double sockets follow the BS 1363 standard, with safety shutters and fused plugs (each plug carries its own fuse). Each outlet is rated 13A, but the total current drawn must stay within the circuit's capacity.

Load capacity: the key point

A double socket does not double the circuit's capacity. If you run two high-power appliances at once, the combined load can approach the circuit limit. As a guide: an electric kettle is around 3kW, a toaster around 1kW, a microwave around 1.2kW. Two of those together is a heavy load for one socket, so stagger their use.

Where double sockets are used

Living rooms (TV and entertainment), kitchens (small appliances above the worktop), bedrooms (lamps and chargers) and home offices (computers and monitors). USB-integrated sockets are popular for charging without an adaptor.

Installation and safety

A safe install needs secure terminal connections, correct polarity, the right back-box depth and firm wall fixing. Loose wiring inside a socket can overheat and is a fire risk, so this is electrician work. Watch for warning signs in use: discolouration, a buzzing sound, or a burning smell means stop and get it checked.

FAQs

Does a double socket give twice the power? No. Both outlets share one circuit, so the total draw must stay within the circuit rating.

Can I plug a kettle and toaster into one double socket? Briefly it may cope, but running both together approaches the limit, so it is best avoided.

What back box do I need? Most double sockets need a 25mm or 35mm box; check the product and the wall type.

Are UK double sockets safe for children? BS 1363 sockets have built-in shutters; tamper-resistant designs add further protection.