Can you run a spur off a ring main?

A spur can be connected to an existing socket, on either a ring main or a radial circuit, providing that socket does not already have a spur. That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets.

Can I spur off a ring circuit?

The rules for spurring off ring circuits are you are allowed ONE unfused spur to a socket (single or double) or ONE fused spur to as many sockets as you wish. You can't have both on the same point.

Can I run a lighting spur off a ring main?

Perfectly acceptable as long as you're not spuring from a spur. Thanks Dave. which is best then, a 2 gang socket 'spurred' off a 32a domestic ring circuit or 2, 1 gang sockets (a spur off a spur). A 2 gang socket spured from a ring is compliant with regs, a spur from a spur isn't, whether single or double socket!

Can you spur off a ring main with a junction box?

A spur comes off the ring circuit via a junction box, or more usually via an existing socket - which ever is easier. See also Adding a spur to a ring circuit from a socket. To install a spur from a junction box, you require a 30amp junction box. Locate the cable of the ring main as close to the new socket as possible.

Can you spur off a ring main in 1.5 mm?

no because you will have a 32 amp mcb protecting a 1.5mm2 cable.

How to wire a spur socket to ring circuit. Add a spur socket to ring main.

Can you add a socket to a ring main?

The easiest way of connecting into a ring circuit is to run a spur cable from the terminals of an existing socket – but you can't connect it to any socket. The IEE Wiring Regulations are very specific about this. You mustn't run a spur from a socket that's already on a spur, or that already supplies a spur.

How many Spurs can you have on a ring main?

A spur can be connected to an existing socket, on either a ring main or a radial circuit, providing that socket does not already have a spur. That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets.

How many sockets can be on a spur?

Non-fused spur can only have one twin socket or one fixed appliance and a fused spur can have as many sockets as you require but care should be taken to ensure that the total load does not exceed the 13A fuse within the switched or unswitched-fused connection unit.

How many 13 amp sockets can a ring main have?

The IET Wiring Regulations (BS 7671) permit an unlimited number of 13A socket outlets (at any point unfused single or double, or any number fused) to be installed on a ring circuit, provided that the floor area served does not exceed 100 m².

Is it OK to spur off a spur?

The reason for not running two spurs from the same spur "point" is that it can lead to possible overloads in that one leg of the final can become unbalanced and exceed the max.

Can I put 2 double sockets on a spur?

you can have maximum one double socket as a normal spur but if you are going from socket to FCU fused at 13 amp from there you can add as many sockets as you wish as all the sockets and cable will be protected by the fuse so no chance of overloading the cable the fuse will blow first.

Can two Spurs be off one socket?

Only one fused spur may be taken from any socket on a ring. From that fused spur you can have as many electrical outlets as you like, as they are then protected by the fuse.

Can I run a spur from a light switch?

Unless there is a neutral at the light switch, you'd better run the spur from the nearest light fitting.

How many sockets can you have on a ring main?

There is no limit to the number of sockets you can have on a ring main but there is a limit to the number of spurs you can have from those sockets or from the wiring between them. If you would like to know how to add a spur to an existing ring main, see our project on adding an extra socket.

Are ring mains still used?

Yes, ring mains (more correctly called ring final circuits these days) were and still are the norm for most UK dwellings. A very common arrangement was two ring final circuits, one for upstairs and one for downstairs.

What is the maximum load on a ring main?

In very simple terms, the ring main can deliver 32A - it does this by using cable rated at 16A wired in a ring, so that each socket or outlet has 2 paths back to the consumer unit.

Can I use a plug instead of a fused spur?

So as long as the plug sockets are accessible without touching the appliance to turn it off then this is fine, but also a fused spur is fine too."

Is 2.5 mm cable OK for Spur?

The unfused spur should supply just one single or one double (twin) socket outlet. It should be wired in 2.5mm2 P.V.C./P.V.C. T&E cable.

Can you mix 1mm and 1.5 mm cable?

IET Forums - Mixing cable sizes. So it's ok even if I have wired half of the circuit in 1.5 and then do the rest in 1mm. Yes, mixed cable sizes are fine provided that the smallest cable is compliant for the size and type of OCPD. AND that the voltage drop for the entire circuit is within acceptable limits.

Can I use 2.5 mm cable for sockets?

2.5mm is commonly used for behind sockets, while 1-1.5mm is most often used for lights (depending on how many lights you have in a circuit).

Can I add a fused spur to a socket?

You can add another socket of any socket all ready in the ring main, this is then classed as a "spur"on the ring. you do not need to fit a fused spur. But you cant add further sockets from the spur .

Is adding a spur notifiable?

Some minor electrical work will not be notifiable (see above). Examples include adding a lighting or power point to an existing circuit, adding a spur to an existing circuit or replacing a light fitting.

How long can a spur off a ring main be?

Section 7.2. 2 of the OSG says 'as a rule of thumb for rings, unfused spur lengths should not exceed 1/8 the cable length from the spur to the furthest point of the ring'.