What Is a Spur Socket?

A spur socket is an extra socket added to a ring circuit via a branch connection, rather than being wired directly into the ring itself. This is a common way to add a socket where the ring circuit runs nearby, without needing to break into and extend the ring.

How does spurring work?

A spur is typically taken from an existing socket on the ring, or from a dedicated junction box connected into the ring, and run out to a new single or double socket. Because a spur draws its power from one point on the ring rather than being part of the loop itself, there are limits on how a ring can be spurred, to avoid overloading any one section of the circuit.

Spur socket vs fused spur — what's the difference?

A spur socket is a standard socket added via a spur connection off the ring — it's about how the socket is wired into the circuit. A fused spur is a specific type of switch containing its own fuse, used to provide a dedicated, fused connection point for a fixed appliance such as an extractor fan, rather than a general-purpose socket. See our fused spur guide for more on that distinction.

Are there rules around adding a spur socket?

Yes — there are limits on how many sockets can be added via spurs from a single ring circuit, and specific rules about how a spur should be connected, to avoid overloading any section of the ring. This is exactly the kind of detail worth confirming with a qualified electrician before adding a spur socket yourself.

Frequently Asked Questions

What is a spur socket?

A spur socket is an extra socket added to a ring circuit via a branch connection from an existing socket or junction box, rather than being wired directly into the ring.

Is a spur socket the same as a fused spur?

No. A spur socket is a standard socket connected via a spur off a ring circuit. A fused spur is a specific switch with its own fuse, used to provide a dedicated connection for a fixed appliance.

Can I add a spur socket myself?

There are specific rules governing how many sockets can be spurred from a ring circuit and how they should be connected. It's worth having this checked or carried out by a qualified electrician.

Related guides: what is a fused spur? and what is a ring circuit?