The invention relates to a carrier tube (1) for ceiling elements, particularly for aircraft cabins, comprising electrical lines (5) running inside the carrier tube. In order to obtain high flexibility regarding the position from where current is to be conducted from the electrical lines to components in the ceiling elements, the invention proposes for the lines to be designed as busbars and thus to mount them toward the inside of the carrier tube in a non-insulated way at the inside of the wall (4) of the carrier tube. Furthermore, the invention provides for said busbar system to be combined with a corresponding collector comprising contacts that correspond to the busbar.