How is a bonding jumper or conductor defined?

A bonding jumper or conductor is defined as a reliable conductor that ensures electrical conductivity between metal parts. This definition emphasizes the crucial role of bonding jumpers in electrical systems, where they provide a continuous and low-resistance path that connects various conductive parts. This connection is essential for maintaining a common electrical potential, which helps to prevent the buildup of static electricity and reduces the risk of electrical shock or fire.

In addition, bonding jumpers play a significant role in fault current paths, helping to facilitate safe operation and maintaining the integrity of the electrical system. This aspect of grounding and bonding is fundamental in creating safe environments in electrical installations, enabling proper operation of protective devices like circuit breakers and fuses.

The other options do not accurately capture the primary function of a bonding jumper. For instance, a conductor used to send signals does not represent the purpose of bonding, nor does a temporary connection for testing fit the definition's intent. Lastly, while a grounding tool for electric vehicles may serve a different purpose, it does not align with the specific definition of a bonding jumper or conductor.