What are overhead wires?

Some articles on overhead wires, overhead, wires, wire:

History Of The Oslo Tramway And Metro - Metro
... Originally it had overhead wires, low platforms and was served using trams ... T1300 cars differed in that they could run on both third rail and overhead wires ... metro, the western lines were gradually becoming more like the metro, although they retained overhead wires, a different signaling system and shorter ...
DC Streetcar - Development
... design of the streetcar system, which relies on overhead electrical wires and a pantograph to conduct power to the streetcar motor ... The NCPC has also opposed use of the wires along H Street NE, the 11th Street bridges, and in Anacostia ... of Columbia officials say the current overhead lines are not visually obtrusive, and that conduit collection systems are costly and break down easily in ...
Overhead Line - Overhead Catenary
... A catenary is a system of overhead wires used to supply electricity to a locomotive, streetcar, or light rail vehicle which is equipped with a pantograph ... Unlike simple overhead wires, in which the uninsulated wire is attached by clamps to closely spaced crosswires supported by poles, catenary systems use at least two wires ... The catenary or messenger wire is hung at a specific tension between line structures, and a second wire is held in tension by the messenger wire, attached to it at frequent ...
List Of British Rail Electric Multiple Unit Classes
... AC units operate off 25 kV alternating current (AC) from overhead wires ... Where clearances for the overhead wires on the Great Eastern Main Line and London, Tilbury and Southend railway routes were below standard, a reduced voltage of 6.25 kV AC was used ... and initially the Great Eastern Railway routes used 1,500 V DC from overhead wires ...
List Of IEC Technical Committees - List of Technical Committees
... properties and classes and their identification TC 4 Hydraulic turbines TC 5 Steam Turbines TC 7 Overhead electrical conductors TC 8 Systems aspects for electrical energy ... and microwave passive components and accessories SC 46A Coaxial cables SC 46C Wires and symmetric cables SC 46F R.F ... selection and detection TC 51 Magnetic components and ferrite materials TC 55 Winding wires TC 56 Dependability TC 57 Power systems management and associated information exchange TC 59 Performance ...

Famous quotes containing the words wires and/or overhead:

    Under a world of whistles, wires and steam
    Caboose-like they go ruminating through
    Ohio, Indiana—blind baggage—
    To Cheyenne tagging . . . Maybe Kalamazoo. See Vagagonds
    Hart Crane (1899–1932)

    There’s something wonderfully exciting about the quiet sing song of an aeroplane overhead with all the guns in creation lighting out at it, and searchlights feeling their way across the sky like antennae, and the earth shaking snort of the bombs and the whimper of shrapnel pieces when they come down to patter on the roof.
    John Dos Passos (1896–1970)