Abstract: An arrangement in a conductor track, the conductor track having a connection groove extending in the longitudinal direction of the track for connecting devices to the conductor track by way of an adapter, current conductors arranged in the connection groove in the longitudinal direction thereof for supplying power by way of the adapter to the devices connected to the conductor track, and at least one signal conductor arranged in the conductor track for supplying by way of the adapter a control signal, such as a bus control signal, to the device connected to the conductor track. To achieve a simple and esthetically advantageous solution, at least one signal conductor is arranged in the connection groove of the conductor track, and a partition wall of electrically conductive material is arranged between the signal conductor and the current conductor.