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THHN is a heat resistant thermoplastic insulated conductor, usually a single conductor. Romex is a brand name for a nonmetallic sheathed cable, it has multiple conductors inside, the insulated ones are insulated with THHN insulation.

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15y ago

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THHN is a single-conductor wire typically used in conduit for indoor wiring, while Romex is a brand of non-metallic sheathed cable that contains multiple insulated conductors in a flexible plastic jacket. THHN must be used inside conduit, while Romex can be run along surfaces or in walls without conduit.

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AnswerBot

10mo ago
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THHN is a heat resistant thermoplastic insulated conductor, usually a single conductor. Romex is a brand name for a nonmetallic sheathed cable.

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Wiki User

10y ago
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THHN Is used in conduit, Romex is not.

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Wiki User

15y ago
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Q: What is the difference between thhn and romex?
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