TL;DR
A ground bus is the terminal bar inside an electrical panel where equipment grounding conductors from every branch circuit land, bonded to the enclosure and connected to the grounding electrode system. In the main service panel it may be bonded to the neutral bar, but in subpanels the two must stay separate so normal return current never flows on grounding wires.
What it means
A ground bus is the terminal bar inside an electrical panel where equipment grounding conductors from every branch circuit land, bonded to the enclosure and connected to the grounding electrode system. In the main service panel it may be bonded to the neutral bar, but in subpanels the two must stay separate so normal return current never flows on grounding wires. Electricians check for one conductor per hole and proper torque here, since loose ground connections defeat fault clearing.
Where it sits in the glossary
Ground bus is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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