TL;DR
A bonding bushing is a threaded conduit fitting with a set screw and a lug that accepts a bonding jumper, used to guarantee electrical continuity between a metal raceway and the enclosure where an ordinary locknut connection cannot be trusted. The NEC requires it at concentric or eccentric knockouts that break the fault path and on service conduits, where fault current has no upstream breaker to clear it quickly.
What it means
A bonding bushing is a threaded conduit fitting with a set screw and a lug that accepts a bonding jumper, used to guarantee electrical continuity between a metal raceway and the enclosure where an ordinary locknut connection cannot be trusted. The NEC requires it at concentric or eccentric knockouts that break the fault path and on service conduits, where fault current has no upstream breaker to clear it quickly. Many versions add an insulated throat that protects conductor insulation from the raceway edge. Inspectors look for it at service equipment, where the lug must carry a jumper sized per NEC 250.102.
Where it sits in the glossary
Bonding bushing 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.
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See also
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