Final answer:
The question is about the size of bonding jumpers in electrical systems.
Step-by-step explanation:
The question refers to the subject of electrical engineering, specifically in the context of bonding jumpers in electrical systems. A bonding jumper is a conductor used to connect the main bonding point to the system bonding point, ensuring electrical continuity and grounding. In this case, the question is discussing the size of the bonding jumper, which refers to the cross-sectional area of the conductor.