Grounding & Bonding: Exam Theory Meets Real Panel Wiring
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Grounding and bonding get lumped together on the exam, but they do two different jobs — and mixing up the terminology is one of the most common ways to lose points in this section.
In this lesson: grounding vs bonding, the main bonding jumper (service only), system bonding jumpers for separately derived systems, the grounded-vs-grounding wording trap, bonding metal piping and structural steel, isolated ground receptacles, the range/dryer neutral-grounding exception, equipment bonding jumper sizing, and the 25-ohm ground rod rule — all tied back to what it actually looks like inside a real panel.
