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What is the Difference Between THHN Vs. THWN Wire

What is the difference between THHN vs THWN?

THHN is a code for thermoplastic high heat resistant nylon coated wire which is allowed for use in dry to damp location and rated for a maximum temperature of 90ºC (194ºF).

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).

The THWN wire we carry is actually coded THWN-2 indicating its rated 90 degrees for both wet or dry locations which is even better.

All of our wire here at Wire And Cable Your Way is dual rated THHN/THWN-2 which contains all of the above ratings and properties.  This dual rated THHN/THWN-2 will be printed on the jacket of each wire.

If you would like to view our THHN/THWN-2 category and learn more please click the link below:

Call 855-880-8010 if we can answer any questions!

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