ABB busbars enable the safe and cost-effective cross-wiring of miniature circuit breakers, residual current protection devices, and other modular installation devices. The following must be considered when selecting the correct busbar: Terminal type (double terminal or cage clamp), number of device poles (1, 2, 3, 4, 1+N, or 3+N), device type (miniature circuit breakers, residual current protection devices, or modular installation devices), combinations of different device types, use of miniature circuit breakers with auxiliary switches mounted on the right or bottom, busbar connection cross-section (current-carrying capacity), and number of modules (selection of standard or cuttable busbars).