ELECTRICAL DISTRIBUTION SYSTEM HAVING AN IMPROVED PLUG-IN ASSEMBLY FOR CURRENT TAP-OFF

An improved plug-in assembly facilitating the tap-off of electrical current from bus bars carried in a busway section that includes opposite side rails and a plurality of plug-in openings formed in each of the side rails in back-to-back association or registration with each other. The plug-in assembly includes a substantially symmetrical insulating base and a door, each swingably connected to the side rail. Ears formed in the side rail adjacent the plug-in opening are aligned with ears formed on the door and a drive screw extends through holes in each pair of ears and into an opening in a support post provided on the side of each base. The screw is fittingly retained in the ear of the side rail while the door and base members fit loosely over the drive screw to permit those parts to swing between an open and a closed position. A metal cover latch is self-retained in one of a pair of symmetrically positioned latch retaining grooves on the front of the base which retains an integral catch portion on the door. A hole in each retaining groove facilitates connection of the base to the rail member with a pair of screws. The screws can be removed from the rail to permit swing-open movement of the assembly for certain types of tap-off, with the self-retained latch permitting the screws to be captured between the door and the base. While the front portion of the base is symmetrical, the rear portion includes five ribs shaped and dimensioned for overlaping complementary receipt of the ribs of an identical base which has been rotated 180 DEG and is carried in a registered opening of the busway section.