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Sockets and power

Normally yes. An extra socket is usually an addition to an existing ring or radial circuit, which is non-notifiable in England but still needs to comply and be certified with a Minor Works Certificate. What matters is the condition and loading of the existing circuit, and the cable route.

7 questions in this topic. General UK guidance, not advice about a specific property.

Can I have extra sockets added?

Normally yes. An extra socket is usually an addition to an existing ring or radial circuit, which is non-notifiable in England but still needs to comply and be certified with a Minor Works Certificate.

What matters is the condition and loading of the existing circuit, and the cable route. Tell us which wall, whether it is solid or stud, and what will be plugged in.

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What is a spur and how many can I have?

A spur is a branch taken off a circuit to feed an accessory. On a ring final circuit, an unfused spur may feed one single or one double socket, taken from a socket or a junction point on the ring.

A fused spur (a fused connection unit) can feed more, because its own 13A fuse protects what comes after — which is why fixed appliances such as boilers, extractor fans and towel rails are commonly fed this way.

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Are USB sockets worth fitting?

They are convenient, especially in bedrooms and kitchens. Two things to know: the USB module is electronics, so it will date and eventually fail long before the socket does, and older USB-A modules charge modern devices slowly — look for USB-C with meaningful output.

They fit into a standard back box, so it is usually a like-for-like accessory change on an existing circuit.

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Can a damaged socket just be swapped?

A like-for-like replacement is straightforward, but if the socket was damaged by heat or arcing, the faceplate is the symptom rather than the cause. The terminations and the circuit behind it should be checked at the same time.

The circuit must be isolated first, and a socket that has overheated should not be put back into service until the reason is understood.

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Is it safe to use extension leads and adaptors?

A good quality extension lead used sensibly is fine. The risks are overloading — a 13A lead total, not 13A per socket — plugging one extension into another, and running high-power appliances such as heaters, kettles or tumble dryers through them.

Block adaptors stacked in a socket are the worst offender. If you are permanently relying on extension leads, that is a sign the room needs more fixed sockets.

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What height should sockets and switches be?

In new dwellings and some extension work, Part M expects accessible positioning — typically switches and sockets between 450mm and 1200mm above floor level. Existing homes being altered are not automatically required to change.

Beyond the regulation, think about use: sockets above a worktop, behind furniture, near a bed, or at desk height all want deliberate positioning agreed at planning stage.

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What is a ring main and is it better than a radial?

A ring final circuit loops out from the board and back to it, usually on 2.5mm cable with a 32A device. A radial runs out and stops, typically on 4mm with a 32A device or 2.5mm with a 20A device.

Both are compliant. Rings are traditional in UK housing; radials are often used in new work because they are simpler to test and easier to fault-find. The important thing is that the circuit is correctly designed and tested, not which shape it is.