A bus assembly that is structured to be coupled to a multiple pole circuit breaker and to a plurality of horizontally aligned vertical line conductors is disclosed. The circuit breaker has a back side with a line terminal and a load terminal for each pole extending therefrom. At least two terminals are associated with different poles are vertically aligned. The bus assembly includes a first set of line buses structured to be coupled to the line terminals, and include at least one line bus having a horizontal offset, as well as a second set of load buses structured to be coupled to the load terminals and extending in a direction generally parallel to the load terminals.