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54.5157°N 1.169°W River Medway Cable Tunnels (Grain – Chetney Marsh), Kent 1.7 1977 400 kV 51°25'14.6"N 0°41'59.6"E ; 51°26'09.0"N 0°42'18.9"E Severn-Wye Cable Tunnel (Aust – Newhouse) 3.6 1973 400 kV 51.608459°N 2.615454°W ; 51.610878°N 2.669090°W Sheffield, Neepsend – Pitsmoor and Sheffield City substations, South Yorkshire
The electrical length of an antenna, like a transmission line, is its length in wavelengths of the current on the antenna at the operating frequency. [1] [12] [13] [4]: p.91–104 An antenna's resonant frequency, radiation pattern, and driving point impedance depend not on its physical length but on its electrical length. [14]
The cable began operating in May 1991, and has a capacity of 675 megawatts. [1] [4] In 2014, the cable was damaged by an anchor from a boat. [6] [7] [8] The incident caused roughly 66,000 gallons of cable insulation fluid to be released into Hempstead Harbor. As of 2021, there are proposals to upgrade the cable in order to increase its capacity ...
Wire sized 1 AWG is referred to as "one gauge" or "No. 1" wire; similarly, thinner sizes are pronounced "x gauge" or "No. x" wire, where x is the positive-integer AWG number. Consecutive AWG wire sizes thicker than No. 1 wire are designated by the number of zeros: No. 0, often written 1/0 and referred to as "one-aught" or "single-aught" wire
Comparison of SWG (red), AWG (blue) and IEC 60228 (black) wire gauge sizes from 0.03 to 200 mm² to scale on a 1 mm grid – in the SVG file, hover over a size to highlight it. In engineering applications, it is often most convenient to describe a wire in terms of its cross-section area, rather than its diameter, because the cross section is directly proportional to its strength and weight ...
Wire gauges may be broadly divided into two groups, the empirical and the geometric. The first includes all the older gauge measurements, notably the Birmingham gauge (B.W.G. or Stubs) and the Lancashire. The origin of the B.W.G. is obscure. The numbers of wire were in common use earlier than 1735 when the measurements were officially defined. [1]