Abstract: A panelboard/switchboard assembly for accommodating bolt-on modules, plug-in modules and lugs. The panelboard/switchboard includes vertical, edge forward bus bars having a plurality of openings formed therein. The edge forward alignment allows plug-in modules to be mounted to the bus bars. The openings in the bus bars receive bolts for mounting straps to the bus bars and for mounting lugs to the bus bars. The openings have a shape having at least one linear element and receive a bolt having an anti-rotation portion with a similar shape. The interference between the opening and the anti-rotation portion of the bolt prevents the straps, and the modules connected to the straps, from rotating.

Abstract: A circuit breaker panelboard enclosure is adapted to receive circuit breaker covers that are attached to the interior or circuit breaker module without requiring attachment screws and the like. The circuit breaker modules within the enclosure are equipped with electrically-insulative extension clips that are received and retained within apertures formed in the circuit breaker covers in press-fit relation. The circuit breaker covers are removed by grasping the ends of the circuit breaker covers and pulling the circuit breaker covers away from the enclosure.