Keywords: Electric tram- Siemens 1884 in Frankfurt.jpg Werner von Siemens's third tram system was installed from Frankfurt to Offenbach Germany in 1884 Direct current was supplied through overhead cables running on 500 Volts <ref> cite book http //books google com/books id ESnBiR7vLPQC pg RA4-PA488 lpg RA4-PA488 488 World Railways of the Nineteenth Century Jim Harter JHU Press 2005 9780801880896 2009-01-07 </ref> cite book The Siemens Tram from Past to Present http //www siemens pl/upload/images/TS-Siemens_lekkie 20pojazdy_historia pdf page 1 pdf English Siemens corporation 2009-01-07 </ref> after 1883 Author Notes <references/> PD-old 1884 in Frankfurt am Main 1884 Siemens trams History of electrical engineering FOTG 11 History of Offenbach am Main 1884 in tram transport Two-pole overhead lines Tram drivers Trams with fleet number 11 Black and white photographs of trams |