A jumper adapted to electrically connect adjacent ones of an array of uninsulated conductive substantially rigid vertical pins. The jumper is formed of resilient, electrically conductive sheet material and comprises a generally vertical plate portion having a free upper lengthwise edge and two generally vertical side edges, and a pin-retaining spring portion integrally connected lengthwise to the plate portion. The jumper further provides position stabilizing means comprising two arms, each arm being integrally connected to a side edge of the plate portion and bent away from the plate portion at an angle of about ninety degrees thereto. The arms are lengthwise spaced apart by a spacing adapted to clear the outer surfaces of the two adjacent pins to be connected, whereby the arms stabilize the jumper to resist tilting thereof and to prevent shorting other adjacent conductive pins.

A bus bar connector system including a bus bar which is a conductive band coated with an electrically insulating material, and a conductive contact clip which is slotted to receive the bar and locally remove the insulation therefrom to electrically connect the clip to the bar. The clip with the bar defines a receptacle for an electrical terminal post and the clip has a resilient lever arm to contact the terminal post and thus complete the electrical circuit from the post to the bus bar.

A bridging clip used to interconnect a plurality of electrical terminals which are spaced apart in horizontal rows and vertical columns has incorporated therein a novel positioning means or centering tab. The centering tab provides accurate placement and alignment to avoid problems associated with short circuiting or commoning.

A clip operable to connect an electrical terminal post with a bus strip comprises: A. a channel section having opposed arms between which the bus strip is receivable, B. and a generally hook shaped section integral with one of said arms, said hook shaped section containing an opening to pass said terminal post extending generally parallel to said one arm, C. there being means on the channel section to retain the bus strip in a zone formed by the channel section.

A bus bar constructed to bend connector posts and make electrical contact with them at three loci of bar points. In vertical section, vertical lines between first and second bus contact points are spaced from third bus contact points adjacent said vertical lines by a distance less than the thickness of the posts, the locus defined by said vertical lines corresponding generally with a locus of post centerlines.