TL;DR
A CT clamp is a split-core current transformer that snaps around a service or branch conductor and reports the current flowing through it, without any wire being cut or disconnected. Solar and battery systems rely on them at the main panel for consumption monitoring and for zero-export or load-management functions, while whole-home energy monitors use a pair on the service mains.
What it means
A CT clamp is a split-core current transformer that snaps around a service or branch conductor and reports the current flowing through it, without any wire being cut or disconnected. Solar and battery systems rely on them at the main panel for consumption monitoring and for zero-export or load-management functions, while whole-home energy monitors use a pair on the service mains. Orientation and placement matter, a CT installed backward or on the wrong conductor produces nonsense data, a common punch-list fix at system commissioning.
Where it sits in the glossary
CT clamp 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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