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Century power transmission. Illustration showing Sebastian Ziani de Ferranti (1864-1930) testing his 10,000 Volt cable in 1890. His assistant (with a look of trepidation) is holding an uninsulated chisel as it is driven through the live cable, to demonstrate Ferranti's protective cut-out. Deptford Power station in south-east London, also designed by Ferranti and opened in 1889, was the first station to produce a high- voltage output (10,000V) for transmission.
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