SOLUTION

A bonding conductor or jumper is a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.

The primary purpose of a bonding conductor or jumper is to ensure electrical conductivity between two conductive bodies, such as a box and a metal raceway. Bonding jumpers are particularly important where a box contains either concentric- or eccentric-type knockouts. These knockouts can spoil the electrical conductivity between the metal parts and actually introduce unnecessary impedance in the grounding path.