Electric Ring Main Diagram

In practice meeting this requirement is rarely an issue.

Electric ring main diagram. Within the electrical industry the ring main circuit sometimes ring main or ring final circuit is an electrical wiring technique that is most commonly used in the uk. It can serve an area up to 120 square yards. We read and respond to all feedback by email. It is normally protected by a 30 amp fuse or 32amp circuit breaker it can have any number of sockets or fused connection units on it but the maximum load is 7200 watts.

Was this page useful. Usually the protective devices used on a ring main will be a 30 a fuse 30 a breaker or 32 a breaker and the cables are usually 2 5mm in size. If using a 30amp cartridge fuse no more than 60m of cable can be used if using a 32amp mcb no more than 50m of cable can be used. 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.

Electrical ring main wiring correctly called ring circuit or final ring circuit how to wire a ring circuit final circuit or ring main. The ring circuit is made up of two radial circuits connected to the same series of accessories within the circuit. Iee wiring regulations stipulate that a single ring main may not serve an area larger than 100m 1076 sq ft and that maximum cable lengths are observed. What is a ring main.

Wiring a socket correctly in a final ring circuit or ring main. Give us some feedback. Each protected by a 5 amp fuse or 6 amp trip in the consumer unit. Each house should ideally have at least two lighting circuits.

In modern domestic properties in the uk the main electric lighting circuits are separate from the power ring main circuit. An example of distribution network with ring main units combinations of rmu units by schneider electric in case a circuit breaker is the switching device it is also equipped with protective relaying either with a very basic self powered type or a more advanced one with communication capabilities. They are not so common in the uk but are used extensively abroad as the ring main or final ring circuit does have it s drawbacks. In the exam you may have to interpret a diagram of the ring main similar to this one.

The ring circuit or ring main as it is often called starts at the consumer unit and returns to the consumer unit. Cable rating for cables used in a ring main must be no less than two thirds of the rating of the ring main s protective device.