Seismic-proof bus duct joint

摘要

A bus duct joint for joining two bus ducts consists of a sheet metal enclosure having openings at each end for receiving the respective ends of bus ducts having internal bus which is to be joined together. The interior of the joint member contains flexible conductors for electrically connecting the corresponding bus bars of the two bus ducts so that the bus bars can have a given movement with respect to one another without undue strain on the bus supports. Each of the flexible conductors is covered by flexible insulation material bus joint covers. A sealing rubber sheet surrounds a window through which at least one of the bus ducts enters the sheet metal joint member so that there can be misalignment between the duct and the joint member. An annular metal shield surrounds the end of the bus duct which engages the sealing rubber sheet to prevent water from contacting the conductors if the rubber seal becomes ineffective and to prevent objects from slipping between the metal seal and the bus duct and into the interior of the joint.