Patent ID: 7862352

Claim:
An electrical panel assembly, comprising: a first electrical panel module comprising: a first receptacle; a first rotation ring that is rotatable between an open position permitting connection or disconnection of a first connector from said first receptacle and a closed position preventing connection or disconnection of the first connector from said first receptacle; a first module tab cam interlock operably coupled to said first rotation ring and rotatable between a first position when the rotation ring is in the open position and a second position when the rotation ring is in the closed position; and a first module tab cam interlock aperture, wherein said first module tab cam interlock in the second position is located adjacent to said first module tab cam interlock aperture, wherein said first electrical panel module interacts with a second electrical panel module in a manner such that the absence of the first connector in said first receptacle prevents said second electrical panel module from accepting a second connector.