Why can't you take a 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 you wire a spur off a spur?

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 times can you spur off a spur?

The limit of one spur per point is if the point which is spurred off is UNFUSED. If you fuse it to 13A you can put as many as you want on it. The reason I explained was that standard final ring circuits wired in 2.5mm2 T&E are designed such that any point on the ring will not be loaded above 20A for an extended period.

Can I take a spur off a ring main?

Branches know as spurs may be taken off the ring from any socket or by breaking into one of the cables of the ring. They can either be non-fused which connect directly to the ring or can be a fused spur which connect to the ring via a switched or unswitched-fused connection unit.

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.

SPURS ON SPURS Extending Circuits

How many sockets can you spur off a ring main?

You can have one unfused spur per socket-outlet on a ring main or one fused spur per socket-outlet, you can have as many sockets as you like off of a fused spur.

Can you add a spur to a fused spur?

Yes ,a fused connection unit connected to a ring final can have an unfused spur connected to its supply terminals. And of course the load terminals of the FCU can supply another load, limited by its fuse.

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'.

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 I add more sockets to a ring main?

Make sure the power is turned off and any circuits you are working on are completely isolated. See our electrical safety project. If you need extra sockets in a new room or turn an old room into an office, it may not be possible to add extra sockets from your existing ring main.

Can I add a socket to a fused spur?

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 .

How many plug sockets can you have on a spur?

How Many Sockets Can Be on a Spur? Only one spur can be connected to a single socket.

Can a fused spur be part of the ring main?

A fused spur is an electrical supply accessory that incorporates a fuse. This fuse, with a lower rating than the fuse for a ring man, allows an electrical supply using one feed cable to a socket to be taken off a ring main.

Can you spur off a socket with one cable?

If the socket is part of the ring, then he cannot spur another socket off it. Only one unfused spur of a single or double socket can be spurred from each socket outlet on the ring or stationery equipment on the ring.

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.

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."

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.

How much power can you draw from a spur?

The maximum load you can run from a spur is 13A (Approx 3kW). If the sockets are fed from a fused connection unit (and fused at 13A) then the number of sockets supplied could in theory be as many as you want - providing that the total load of what ever you connect/use simultaneously doesn't exceed 13A.

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.

Can I install a fused spur myself?

As long as the job isn't within a 'special location' such as a bathroom or outdoors, you're also allowed to install additional new light fittings, switches, sockets and even add a single fused spur to an existing circuit (a 'spur' is a new cable and socket run as a branch from an existing socket on the ring main).

How many sockets can you spur off a fused spur?

If the circuit is a ring circuit then an unfused spur can supply a maximum of one single or one double socket. A fused spur, as you propose, can supply an unlimited number of sockets with a maximum load of 13A.