Lighting Circuit Ring Or Radial

This design enables the use of smaller diameter wire than would be used in a radial circuit of equivalent total current.

Lighting circuit ring or radial. If in ring main circuit broken or disconnect any point though it still works but there is slightly vulnerable to certain sorts of breaks in ground protection. Each house should ideally have at least two lighting circuits. In both ring and radial circuits the circuit wiring starts at a consumer unit or distribution board and traverses in turn a number of sockets or devices point to point style before terminating. Wiring lighting circuits as a ring circuit in general domestic installations would be troublesome and adding unnecessary complications.

The difference is that a radial circuit simply ends upon reaching the last connected device in any branch whereas in a ring circuit the termination is made by. Lighting circuits as a radial. Lighting circuits which typically have lower power requirements are usually radially wired confusingly sometimes called loop wiring. It is not good practice in my opinion to wire lighting circuits as a ring because when altering them it is easy to break the ring as you wouldn t expect them to be wired that way.

Generally ring circuit require less cable as there are two parallel routes back to the circuit breaker cb at distribution board db which allows thinner cable to be used for the same load what works like two radial circuit or other way we can say one ring circuit may replace by two radial circuits. A ring main brings electricity from the consumer unit through the house. In modern domestic properties in the uk the main electric lighting circuits are separate from the power ring main circuit. I don t know of any ring final lighting circuits used in domestic but i hear they are used in commercial or industrial.

With a ring it requires two loose screws to remove the cpc from any sockets. Most modern socket circuits are ring circuits or ring mains as they are sometimes referred to. With a radial one loose screw in an earth terminal can break the cpc continuity to down stream sockets. Its advantages over radial circuits ar.

To avoid the house being in total darkness if a fuse should blow or trip lighting circuits are split into upstairs and downstairs. In electricity supply design a ring final circuit or ring circuit is an electrical wiring technique developed and primarily used in the united kingdom. What is ring circuit ring main circuit. A standard radial circuit can be extended from any point or points that provide a permanent live neutral and earth without worries about having a spur off a spur or extending the ring.

If a cartridge fuse is used it should be rated at 5amps if an mcb is used it should be rated at 6amps. The ring main is connected to the consumer unit on both ends which helps lighten the load on the wires. The reduced diameter conductors in the flexible cords connecting an appliance to the plug intended for use with sockets on a ring circuit are individually protected by a fuse in the plug. They are ring circuits radial circuits and lighting circuits.

Please also check the rules very carefully for ring mains and radial circuits. Rings do have the advantage of a high integrity cpc. Each protected by a 5 amp fuse or 6 amp trip in the consumer unit.