The answer is jumper! We only look at phase A (yellow wire). The connection method in the photo is to connect the main switch to the first circuit breaker, and then connect a wire from the top of the first circuit breaker to the second circuit breaker. This paper defines ten essential rules for reliable jumper wire installation. It covers placement, routing, insulation, bonding, and documentation to ensure electrical integrity and long-term performance. Jumper wires play a critical. This new technical paper by Andy Price, Bob LePage, David Cormier and Jim Rennick from Circuit Technology Center explores ten crucial guidelines for secure, organized, and industry-standard attachment and routing of jumper wires on circuit board assemblies, ensuring reliability and optimal. design, for modifications or to correct defects. To ensure the integrity and reliability of these connections, engineers must adhere to s ecific guidelines when working with jumper wires. A jump wire (also known as jumper, jumper wire, DuPont wire) is an electrical wire, or group of them in a cable, with a connector or pin at each end (or sometimes without them – simply "tinned"), which is normally used to interconnect the components of a.