The rule is that you can spur off one socket from a point within a ring main circuit or unlimited number of fcus fused to 13a.
Socket spur off ring main.
To install a spur from a junction box you require a 30amp junction box.
No more than two separate spurs may be connected from each outlet on the ring.
Matt is on site wiring a spur from a ring final circuit.
The most common is to connect it as a spur and this can be done in two ways.
See also adding a spur to a ring circuit from a socket.
Locate the cable of the ring main as close to the new socket as possible.
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.
Matt is using pvc mini trunking and 2 5 mm2 cable to wire a spur socket from an a1 ring final circui.
A spur comes off the ring circuit via a junction box or more usually via an existing socket which ever is easier.
That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets.
Ring circuits adding a socket outlet 1 there are three ways of adding a socket outlet to a ring circuit.
Spur from existing socket outlet.
Its simplicity makes it a great arrangement for that use.
Ring mains may have spurs off them either they can be spured from an existing socket or from a junction box there is importantly over the whole ring the total number of spurs must not exceed the number of socket outlets directly on the main ring.
The spur not only supplies a socket but may supply fcu s as well.
The main purpose of a spur is adding an extra socket on to an existing ring main circuit.