Modular bus-bar for the distribution of electrical energy

Modular ducting element for distributing electrical power, composed of a box section in which are arranged busbars (3) for distributing electrical power, these being laterally accessible through distribution openings of the box section. The box section includes two beams (8, 9) on either side of which are fixed two profiled strips (7), having a trough-shaped cross-section, the respective longitudinal edges (7B) of which are each elastically inserted into a longitudinal groove (10) of a beam, these profiled strips defining, between them and together with the beams, a longitudinal cavity in which the busbars (3) are fixed by means of blocks (6). A wedge (19) is forcibly inserted between one beam (9) and one end of a fixing block which is fixed against the other beam (8) by means of its other end in order to put the profiled strips under tension.