WElectric locomotiveWRailway electrification systemW15 kV AC railway electrificationW25 kV AC railway electrificationWAlstom APSWBattery electric multiple unitWBow collectorWConduit current collectionWDual electrificationWElectric multiple unitWExperimental three-phase railcarWGround-level power supplyWList of tram systems by gauge and electrificationWElectric locomotiveWMulti-system (rail)WMultiple unitWThird railWThree-phase AC railway electrificationWTraction power networkWTraction substationWTrolley poleWUrban rail transit
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