A multi-station, gantry-based automated welding system includes a gantry mounting robotic arc welders or other equipment. The gantry has a range of travel over multiple workstations, each workstation being adapted for rotatably mounting a respective workpiece. A control system controls and coordinates the movements and operation of the gantry, the robotic arc welders and the workpiece-rotating motors located at the workstations. Encoders are installed at the moving elements of the system for precisely tracking and providing output to the computer controller. Primary and secondary power/data distribution systems include cable and hose carriers for providing mobile power/data connections to the gantry and also to the robotic arc welders mounted thereon. The power/data distribution systems are elevated above a facility floor to avoid interfering with equipment, personnel and activities at floor level.