Threaded coupling bonding jumper

摘要

A threaded coupling assembly is provided for joining a pair of confronting conduit members and minimizing electrostatic charge buildup between the conduit members. Each conduit member has an annular flange fixed to the confronting ends thereof. A threaded coupling interconnects the two flanges and includes, in one embodiment, a coupler having an internal annular groove for releasably holding a first annular bonding jumper and an externally threaded outer end. A nut is threaded onto the coupler and has an internal annular bonding jumper retaining groove for a second annular bonding jumper. These bonding jumpers include an annular ring having a plurality of bonding jumper contact flanges at the inner edge which engage the surface of the flanges and made electrical contact therewith and have at least a plurality of spaced retaining tangs at the outer edge which snap into the retaining grooves in the coupler and the nut. In addition, the bonding jumper retained by the nut also includes a plurality of circumferentially spaced coupler contact tangs which are interspersed with the retaining tangs and contact the outer end of the coupler beyond the threads. In a second embodiment, a spacer coupling is provided between the conduit flanges which is threaded at both ends and receives a nut on each end containing a bonding jumper as described above.