A supply system for an electrical line, in particular for a cable for charging electric vehicles, comprising at least one cable store, wherein the cable store comprises a plurality of pulleys, which are arranged in at least two pulley blocks such that a cable can be reeved into the pulley blocks in one or more windings, wherein a first pulley block and a second pulley block are displaceable relative to each other, at least one of the first and second pulley blocks is arranged on a linearly guided, displaceable pulley block carrier, and the first and the second pulley block are movable towards each other against a restoring force,
- wherein the pulley block carrier is guided on and/or in at least one guide profile which is formed as a guide rail or forms at least one guide rail, in that the pulley block carrier is formed as a profile that is complementary to the guide profile and in that the guide profile and the profile of the pulley block carrier engage in each other in a positive-locking manner such that an anti-tilt and anti-twist linear guidance of the pulley block carrier is brought about in the displacement direction, wherein the guide profile is formed as a central guide column which can be installed in a self-supporting manner, and which is formed as a supporting component part for both pulley block carriers, the cable laid thereon as well as the retracting mechanism, and in that the second pulley block is fastened on one side and cantilevered on the pulley block carrier and in that at least one pulley block has in each case multiple pulleys arranged distributed in an arc shape over a circular arc around a deflection axis and at least one of the first and second pulley blocks is arranged and held on the displaceable pulley block carrier.