Socket Ring Main Cable Size

By using a junction box and connecting into the ring circuit cable.

Socket ring main cable size.

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. The earthing conductor is uninsulated since it is not intended to have any voltage difference from surrounding earthed articles. For the rules that govern how tis can be dne please. The diagrammes below show how you can break into a ring main with junction boxes to.

Ring circuits are commonly used in british wiring with socket outlets taking fused plugs to bs 1363 because the breaker rating is much higher than that of any. These rules apply to spurs also. The main purpose of a spur is adding an extra socket on to an existing ring main circuit. Sizes of 1 or 1 5 mm 2 are typically used for 6 or 10 ampere lighting circuits and 2 5 mm 2 for 20 ampere radial or 32 ampere ring socket circuits.

Its simplicity makes it a great arrangement for that use. 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. 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. In this video i show how to wire a spur socket to a ring final circuit using 2 methods 1.

It is not particularly difficult to extend a ring main but you must remember that certain rules apply about the floor area and length of cable one ring main may serve and use. The ring starts at the consumer unit also known as fuse box distribution board or breaker box visits each socket in turn and then returns to the consumer unit.