| Y/M/D | Description | Place |
|---|---|---|
| 1907/00/00 | Cos Cob Power Station is built, 1905-1907, to supply electricity for the New York, New Haven and Hartford Railroad's electrified mainline between New York and New Haven. The first mainline electric railroad in America to use alternating current (AC). | Cos Cob Power Station, Greenwich |
| 1907/07/00 | Westinghouse, Church, Kerr and Co (Westinghouse Electric's construction subsidiary) completes the Cos Cob Power Station to supply power for New York, New Haven and Hartford Railroad's electrified mainline between Stamford and Woodlawn. | Cos Cob Power Station, Greenwich |
| 1924/00/00 | Gare des Carbonnets operates as the Bois-Colombes rail station during the electrification of the Paris-Saint-Lazare - Bois-Colombes section of the Argenteuil line. | Gare des Carbonnets, Asnieres-sur-Seine |
| 1930/09/03 | Thomas Edison drives an Lackawanna Railroad, New Jersey Transit predecessor, electric train from Hoboken Terminal to South Orange station. | South Orange Station, South Orange |
| 1937/12/00 | Electric Locomotive No 4859 is manufactured by the Pennsylvania Railroad's Altoona Shops. | Electric Locomotive No 4859, Harrisburg Central Railroad Station and Trainshed |
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