Consumer unit wiring diagram.
Socket ring main diagram.
For a radial circuit or spur off a ring main there will only be one cable.
The cable size is important it has to be either 2 5sq mm or 4 0sq mm twin core and earth these are rated in free air at 24amps or 32amps respectively.
Ring mains as they are called are a series of cables linked together starting and terminating at the same point in a distribution board.
Make sure that all three wires are secured in each terminal and avoid damaging the wires when replacing the socket.
The main purpose of a spur is adding an extra socket on to an existing ring main circuit.
Consumer unit fuse box is at bottom left.
As you can see it eliminates the need to wire a socket all the way back to the a consumer unit but the nearest ring main socket is used instead.
As before brown is live blue is neutral and the earth wire is bare copper with a green yellow sleeve.
Ring main and spurs.
For a radial circuit or spur off a ring main there will only be one cable.
Its simplicity makes it a great arrangement for that use.
In the diagram here in and out are the existing ring cables and spur is the new cable leading to the new socket outlet.
Connect the cables as shown in the diagram for a ring main circuit.
Diagram of a possible configuration of ring final circuit.
Rear view of double socket showing ring main in and ring main out wiring.
The wiring for a junction box can be seen here.
Connect the cables as shown in the diagram for a ring main circuit.
For the rules that govern how tis can be dne please.
A 30amp junction box should be used on a ring or radial circuit feeding sockets only.
The ring is fed from a fuse or circuit breaker in the consumer unit.