Use of a cable conduit in railway installations, said cable conduit is of the type with: - a number of channels for receiving cables and with an upwardly open U-shaped cross-section with a bottom plate and two sidewalls at each side of the bottom plate; - covers for covering the channels; and - connecting plates for connecting succeeding channels disposed in continuation of each other for forming a continuous channel, and which are covered by each their cover, where channels, covers and connecting plates are formed of metal, where each cover has a downwardly open U-shaped cross-section with a cover plate and two lateral flanges at each side of the cover plate, where the lateral flanges of the cover are spaced apart corresponding to the outer distance between the sidewalls of the channel such that the cover can be placed over the channel with an inner side of its lateral flanges extending down along the outer side of the sidewalls of the channel, where connecting means (11,12,13,17,19) are provided at the sidewalls of the channel and lateral flanges of the cover for mutual connection of a channel and an associated cover, where the bottom plate is provided with perforations serving as ventilation and drain holes, where a rim area around the perforations is pressed downwards from the inner side of the channel, preferably such that frusto-conical projections appear around each perforation at the bottom side of the channel, characterised in that at least a larger central first area of the bottom plate of the channel is delimited by smaller second end areas at the opposing ends of the channel, where the first area is provided with perforations that are evenly distributed across the entire first area and wherein the channel is made of aluminium and that the cover and the connecting plate is made of steel. - a number of channels for receiving cables and with an upwardly open U-shaped cross-section with a bottom plate and two sidewalls at each side of the bottom plate; - covers for covering the channels; and - connecting plates for connecting succeeding channels disposed in continuation of each other for forming a continuous channel, and which are covered by each their cover, where channels, covers and connecting plates are formed of metal, where each cover has a downwardly open U-shaped cross-section with a cover plate and two lateral flanges at each side of the cover plate, where the lateral flanges of the cover are spaced apart corresponding to the outer distance between the sidewalls of the channel such that the cover can be placed over the channel with an inner side of its lateral flanges extending down along the outer side of the sidewalls of the channel, where connecting means (11,12,13,17,19) are provided at the sidewalls of the channel and lateral flanges of the cover for mutual connection of a channel and an associated cover, where the bottom plate is provided with perforations serving as ventilation and drain holes, where a rim area around the perforations is pressed downwards from the inner side of the channel, preferably such that frusto-conical projections appear around each perforation at the bottom side of the channel, characterised in that at least a larger central first area of the bottom plate of the channel is delimited by smaller second end areas at the opposing ends of the channel, where the first area is provided with perforations that are evenly distributed across the entire first area and wherein the channel is made of aluminium and that the cover and the connecting plate is made of steel.