The spur can be taken from any socket or fcu within the ring main circuit. Need to add a socket.
Crabtree Electrical Wiring Accessories
Fused spur wiring diagram. Spur socket wiring how to add an electrical socket to a circuit. Carefully arrange the wiring so as to lie along the edges of the product or box keeping the central area clear. It includes advice on electrical spur wiring with diagrams so that you can find out how to wire up a spur plug socket or have a spur fitted. This is achieved by connecting the fixed earth wire to the earth terminal on the socket or switch and then connecting a short length of wire. The spur not only supplies a socket but may supply fcus as well. How to install a fused spur.
Connect the cables as in the diagram ensuring that the load cable is connected to the appliance in use. If in any doubt on how to. You can clearly see on the wiring diagram that a cable is going to it but nothing going from it. Fitted with a 13 amp fuse. This project is about how to add a spur socket or additional sockets to an existing circuit. It is just a branch off from the ring main to another socket.
To assist with the correct installation of this product please consult the appropriate wiring diagram. When connecting the new accessory ensure that only the bare end of the wire enters the terminal and no bare wires are visible. 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.