Abstract: A system for an aircraft electrical distribution and interconnection system includes a plurality of apparatuses located side-by-side in a cabinet which receives black boxes. Each apparatus has a rack connector having connection pins distributed in a regular pattern with a first mutual spacing and each removably retained in a passage of the rack connector. The rack connector receives a mating line receptical unit having female contact elements connecting with the front ends of the pins. A printed circuit board receives the rear ends of the pins and connects them to second contacts, having a second mutual spacing greater than the first. The second contacts are secured to parallel wrapping stems which are used for interconnection by wrapping and receive routing connectors.