Busbars are available to which numerous conductors can be attached without taking up too much space (up to 70 conductors on a busbar with length of 1 m). The conductors are attached via a pressure piece or a clamping yoke. With the first of these variants, the lugs need not be bent. The clamp simply snaps on tightly onto the busbar. The clamping yoke is pushed onto the busbar and thus can take the wiring in the entire installation. The busbar can be used unperforated in any length. Fixing uses support blocks SH, which for long busbars can be sited between the clamping yokes.