What is thhn wire? THHN is a thermoplastic high-heat-resistant, nylon-coated wire. It's designed with a specific insulation material, temperature rating, and condition of use for electrical wire and cable.
What is THWN Cable? THWN is a code for thermoplastic heat and water resistant which is suitable for use in both dry and wet locations with a maximum temperature rating of 75ºC (167ºF).
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