AC Power Plugs and Sockets: British and Related Types

1951: On June 21, CBS broadcasted the first color program. America’s first commercially produced television sets were based on the mechanical television system - made by John Baird’s television designs. The world’s first television remote control was called the Tele Zoom, and it can barely even be categorized as a remote control. Transmission lines can be used to carry data: this is called power-line carrier, or power-line communication (PLC). The opinion also limited the voltage of new transmission lines built in New York to 345 kV. The cost of high voltage transmission is comparatively low, compared to all other costs constituting consumer electricity bills. Electricity transmission is generally considered to be a natural monopoly, but one that is not inherently linked to generation. The Earth's natural geomagnetic field strength varies over the surface of the planet between 0.035 mT and 0.07 mT (35 μT - 70 μT or 350 mG - 700 mG) while the international standard for continuous exposure is set at 40 mT (400,000 mG or 400 G) for the general public. In the United States, the FERC's Order 1000, issued in 2010, attempted to reduce barriers to third party investment and creation of merchant transmission lines where a public policy need is found.

The development of superconductors with transition temperatures higher than the boiling point of liquid nitrogen has made the concept of superconducting power lines commercially feasible, at least for high-load applications. Additional projects are in development or have been proposed throughout the United States, including the Lake Erie Connector, an underwater transmission line proposed by ITC Holdings Corp., connecting Ontario to load serving entities in the PJM Interconnection region. Rarely, and for short distances, pilot-wires are strung along the transmission line path. A major barrier to wider adoption of merchant transmission is the difficulty in identifying who benefits from the facility so that the beneficiaries pay the toll. The two companies met at Promontory Summit, Utah, north of the Great Salt Lake, in May, 1869. The site is now known as the Golden Spike National Historic Site, operated by the National Park Service with the assistance of volunteers who act as docents, exhibit-makers, locomotive engineers, what is electric cable and locomotive firemen. 3. Always buy your charging cable from a reputable retailer or directly from the manufacturer who will put such products through rigorous tests to ensure they meet UK safety standards. The contact wire tension will be in the region of 2 tonnes. The contact wire has to be held in tension horizontally and pulled laterally to negotiate curves in the track.

Figure 3: Docklands Light Railway train with 3rd rail bottom contact electrification system. The most common reason is when a shoe breaks off and its connecting lead to the electrical equipment on the train has to be secured safely. It has been estimated that waste would be halved using this method, since the necessary refrigeration equipment would consume about half the power saved by the elimination of resistive losses. In November 2009, LaserMotive won the NASA 2009 Power Beaming Challenge by powering a cable climber 1 km vertically using a ground-based laser transmitter. In August 2010, NASA contracted with private companies to pursue the design of laser power beaming systems to power low earth orbit satellites and to launch rockets using laser power beams. Plugs and sockets were usually of an industrial waterproof design with a screw locking ring on the plug to hold it in the socket against waterproof seals, and sockets often had a screw cap chained to them to be used when no plug was inserted to keep them waterproof. D. W. M. Latimer FIEE (2007), History of the 13 amp plug and the ring circuit, London: IET.

Shaver supply units also typically accept a variety of 230 V two-pin plug types including BS 4573 and Australian two-pin plugs. November 1995: BS 1363-4:1995 "13 A plugs socket-outlets adaptors and connection units - Part 4: Specification for 13 A fused connection units switched and unswitched" published. August 2008: BS 1363-5:2008 "13 A plugs socket-outlets adaptors and connection units - Part 5: Specification for 13 A fused conversion plugs" published. SS 472:1999 15 A plugs and switched socket-outlets for domestic and similar purposes. Electrical sockets for single phase domestic, commercial and light industrial purposes generally provide three electrical connections to the supply conductors. The earth pin also serves to operate the basic shutter mechanism used in many sockets. Single-wire earth return (SWER) or single-wire ground return is a single-wire transmission line for supplying single-phase electrical power to remote areas at low cost. Installation instructions for the Italian-made Inda (stage arch model) illuminated mirror states that a low profile plug and socket are required (it has to fit in a space of just 15 mm). The supercharger model requires a modified Type 2 charging cable, also known as a Mennekes plug. Martyn Allen, technical director at Electrical Safety First, says the survey show there is a 'direct link between a lack of electric vehicle infrastructure and vehicle owners charging dangerously'.