Radial Circuit Vs Ring

In electricity supply design a ring final circuit or ring circuit often incorrectly called a ring main a term used historically or informally a ring is an electrical wiring technique developed and primarily used in the united kingdom and to a lesser extent in ireland this design enables the use of smaller diameter wire than would be used in a radial circuit of equivalent total current.

Radial circuit vs ring. I understand that a ring circuit can become no longer a ring and one wouldn t know so ensuring continuity is an issue while 4mm is more tricky to handle as its thicker. As long as the circuit is properly designed then that will work fine. The drawback of a radial electrical power distribution system can be overcome by introducing a ring main electrical power distribution system. A ring circuit has two feeders which both come from the sam.

A radial circuit must follow these rules in general. The theory much argued at the time was that less materials copper were used by running a ring around a room or rooms than running a long radial or radials around the room s due to the reduced conductor csa that could be safely used. In other words the consumer in the radial electrical distribution system would be in darkness until the feeder or transformer was rectified. Ring final circuits in domestic situations are typically wired using 2 5mm cable and with a 32a mcb.

On a historical note ring final circuits were introduced in 1947 in the uk to save on materials in post war reconstruction. Ring main electrical power distribution system. The main advantage of ring main circuit is if any single connector is broken or disconnected at any point in the circuit all the other sockets will still work because they will be being act as radial circuit and fed from the other end of the circuit. I am currently studying my nvq 2330 level 2 and the only difference i can see from the wiring diagrams is that the phase cpc and neutral go back to the consumer board with the ring and doesn t with the radial.

Floor areas of no more than 50m2 requires a 20 a fuse or miniature circuit breaker protection with 2 5 mm live and 1 5mm protective conductors or 1 5 mm if m i. Would be interested to know whether there is any major differences between the ring final circuit and the radial final circuit. If a radial becomes broken its a lot more obvious. In a ring circuit simply put it the wiring is connected at both ends of the circuit.

When you re talking about power system circuits transmission lines feeders etc a radial is supplied at one end only with no tie points to alternate sources feeders while a ring more commonly called a loop can be fed at two or more po.