Lighting Spur Off Ring Main Diagram

Feed the spur cable into the junction box.

Lighting spur off ring main diagram. Hi in this video i m showing how to make a light spur from socket outlet that s on ring circuit. Spur from existing socket outlet. Spur is a short branch of cable from existing ring main circuit. A separate ring main is usually installed on every floor of a given property to make sure things are kept safe and it is only when for example a spur socket additional socket is added on an upstairs ring main to feed a socket or light on a downstairs circuit that things can get tricky.

Ring mains as they are called are a series of cables linked together starting and terminating at the same point in a distribution board. Ring circuits adding a socket outlet 1 there are three ways of adding a socket outlet to a ring circuit. Evening warehouse1 fitting a fused spur is a minor works certificate and not notifiable as long as the connection to the light is direct and not via any outside junction box also make the fcu an rcd type unless your circuit you are tapping off is already rcd protected. For the rules that govern how tis can be dne please.

The spur not only supplies a socket but may supply fcu s as well. The most common is to connect it as a spur and this can be done in two ways. A single cable is added from the new socket and connects to an existing socket on. Cut off the power supply to the relevant circuit from the consumer unit.

The spur can be taken from any socket or fcu within the ring main circuit. Prepare the cable route for the spur from the junction box to the new lighting point using 1mm 2 two core and earth spur cable. 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. 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.

Every unfused spur can only supply one socket or connection unit. That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets. It is just a branch off from the ring main to another socket. Alternatively the ring can be extended.

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. Make a diagram of where all the cores connect.