A shutter assembly for a shuttered bus assembly is provided. The shuttered bus assembly is coupled to a circuit breaker housing assembly. The circuit breaker housing assembly is structured to enclose a circuit breaker assembly. The circuit breaker assembly is structured to move generally horizontally in and out of the circuit breaker housing assembly. The circuit breaker assembly has a plurality of finger connectors extending generally horizontally from the back side of the circuit breaker assembly. The shuttered bus assembly has at least one pair of conductors which extend toward the front of said housing assembly. The finger connectors are structured to engage the conductors. The shutter assembly includes a mounting assembly and a door panel. The mounting assembly is structured to be coupled to the housing assembly. The door panel has at least one opening and at least one door member, the door panel extends across the housing assembly and is disposed between the plurality of conductors and the circuit breaker assembly when the circuit breaker assembly is out of the housing assembly, the door panel is further coupled to the mounting assembly. The at least one door member is disposed in the at least one opening and is coupled to the door panel by a hinge. The door member is structured to move between a first closed position and a second open position. The door member is structured to be moved to the second position by the finger connectors as the circuit breaker assembly is moved into the housing assembly.