Search results
Results from the WOW.Com Content Network
Diagram of a possible configuration of ring final circuit. Consumer unit is at bottom left. 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. The ring is fed from a fuse or circuit breaker in the consumer unit.
Ring (or ring final) A ring final circuit is similar to a radial except what would be the end of the circuit instead loops back to the source protective device in the distribution board. Thus each individual conductor, line, neutral and earth, actually forms a loop (or ring), from the source, out, and back around to the source again. This has ...
The ring main is located well below most water mains, at a depth of 10 to 65 m (33 to 213 ft) below ground level and approximately 10 to 30 m (33 to 98 ft) below sea level. The tunnel is mostly of 2.54 m (100 in) internal diameter, except for the section between Ashford Common and Kew, where it is 2.91 m (115 in). [ 4 ]
In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch ...
Wired connections may also be connected to the final ring, requiring to include a suitably rated fuse and switch. The final ring circuit in the UK requires the use of BS 1363 plugs and sockets. However, the BS 1363 system is not limited to use with final ring circuits being suitable for radial circuits. [44]
The new system replaced the older hard-wired system, which came in many 'flavours' (e.g., Plans 1, 1A, 1B, 1C, 2, 2A, 105, 107 etc.), which could be very complicated and required the attendance at the premises of a GPO telephone-engineer, who needed a complete set of 'N' (wiring) Diagrams, [7] [better source needed] which was very extensive and ...
IET Wiring Regulations", informally called in the UK electrical community "The Regs", is the national standard in the United Kingdom for electrical installation and the safety of electrical wiring systems. [1] It did not become a recognized British Standard until after the publication of the 16th edition in 1992.
Let's look at the example diagram showing 5 sockets on a ring, and add the information from the article that the wiring for phase and neutral in the ring are rates to 67% of the mains OCPD (Over Current Protective Device e.g. a fuse). e.g. let's assume a 30A ring that has wiring rated to carry 20A.