Bonding Jumpers: Main, System & Equipment
4:13
Main, system, supply-side, and equipment bonding jumpers all sound similar, but each one has its own location and its own sizing rule — and the exam loves testing exactly where each one belongs.
In this lesson: the main bonding jumper (service only, sized off Table 250.102, one per disconnect on a multi-disconnect service), the system bonding jumper (one location only — source or first disconnect, never both), the supply-side bonding jumper (line side of service equipment, routing rules when run outside a raceway), and the equipment bonding jumper (load side, sized exactly like an EGC off Table 250.122, the 6-foot outside-raceway limit, and how it differs from the EGC itself).
