TL;DR
Nonmetallic-sheathed cable is the factory assembly of two or more insulated conductors plus a bare ground inside a flexible plastic jacket, the wiring method behind the trade name Romex and the NM-B designation. NEC Article 334 permits it in one- and two-family homes and limits it in other buildings, requiring support every 4.5 feet, protection from physical damage, and dry locations only.
What it means
Nonmetallic-sheathed cable is the factory assembly of two or more insulated conductors plus a bare ground inside a flexible plastic jacket, the wiring method behind the trade name Romex and the NM-B designation. NEC Article 334 permits it in one- and two-family homes and limits it in other buildings, requiring support every 4.5 feet, protection from physical damage, and dry locations only. Its low cost and fast installation are why it dominates residential rough-in.
Where it sits in the glossary
Nonmetallic-sheathed cable 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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