A jumper is a single cable with connecting devices, such as clamps or bolts, at both ends. The connecting devices don’t have to be the same.
Depending on its application, it can be called different names.
When one end is connected to a de-energised line and the other to an earth, then it can be called a “single phase earthingElectrical earthing, also known as grounding, is a safety m... More device”.
When it is used to electrically connect two metallic objects so that they are at the same voltage, then may be called a “bonder”.
