ring final circuit
ring circuit

In electricity supply, a ring final circuit or ring circuit (often incorrectly called a ring main or informally a ring) is an electrical wiring technique developed and primarily used in the United Kingdom.

In this arrangement a cable connected to a fuse, or circuit breaker, in the distribution board was wired in sequence to a number of sockets before being terminated back at the distribution board, thus forming a ring final circuit.

There are however plenty of older installations with such loads on a ring circuit.

With a ring circuit, the current flows to any socket on the circuit in both directions.

In most rooms you can add to what you have by the addition of a spur, connected to the existing ring circuit.

Ring circuits can generate strong unwanted magnetic fields.

The only way to see the pros and cons of ring circuits is to compare them to the other option: radials.

In practice, they are only protected by the ring circuit overcurrent protection of 30A.

Radial circuits are sometimes used for socket outlets, where installing a ring circuit would waste cable.

Appliances connected to sockets on a ring circuit are individually protected by a fused plug.

Testing ring circuits may take 5-6 times longer than testing radial circuits.

As a result, countries using ring circuits find it necessary to add additional lower-rated fuses into the plugs of each appliance.

One of the other recommendations in the report was the introduction of the ring circuit system (often informally called a "ring main").

Some accessories require protection at a lower current than that provided by the ring circuit overcurrent protection device.

In the ring circuit, each socket-outlet was supplied with current by conductors on both sides of the 'loop.'

The ring circuit and the associated BS 1363 plug and socket system were developed in Britain during 1942-1947.

Rules for ring circuits say that the cable rating must be no less than two thirds of the rating of the protective device.

It will be the first time the GT1 category visits the Slovakia Ring circuit.

Ring circuits are commonly used in British wiring with fused 13 A plugs to BS 1363.

Ring circuits continue to operate without the user being aware of any problem if there are fault conditions or installation errors that make the circuit unsafe:

The ring circuit came about because Britain had to embark on a massive rebuilding programme following World War II.

In a ring circuit, on the other hand, it is possible, though unlikely, that the live and neutral currents are not equal on each side of the ring.

In the case of non-permanently connected domestic equipment, a socket rated at 13 A is attached to the ring circuit, into which a fused plug may be inserted.

The purpose of ring circuits is to supply a large number of sockets; therefore, they are protected only with high-rated overcurrent circuit breakers (typically 32 A).

After the total reconstruction in 2005, it was the only racing facility in Russia until the Red Ring circuit has been opened in Siberia in 2007.

The Danish Grand Prix was held at the Roskilde Ring circuit near Roskilde.

A ringer equivalency number of 1 represents the loading effect of a single "traditional" telephone ringing circuit, such as that within the Western Electric Model 500 telephone.