Overhead cable
In contrast to the overhead line an overhead cable is an isolated cable, usually for the transmission of news, laid on pylons (sometimes also for the supply of electric power). Overhead cables are laid mainly for telephone connections of remote buildings and temporary mechanisms (as for example building sites). Also the power supply companies uses for the realisation of their in-house telephone network often overhead cable. Frequently these cables are integrated in the ground conductor. Occasionally also an additional rope is usually shifted on the masts, at height of the highest cross beam. When lines with a odd-number number of conductor cables this is shifted also gladly as anchor phase. At the earlier EVS (now EnBW AG) in Baden-Württemberg, Germany overhead cables for in-house data transmission were often installes until the mid of the 1980ies like garlands on the ground conductor or an auxiliary rope on the pylons. Overhead cables for the data transmission of news along powerlines are nearly always implemented nowadays because of disturbing influences by the powerlines as optical waveguide cables.
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