What is the main difference between THHN and THWN wire?

• Wire
• Cable
• NNC
• Electrical

• 

  Garrie Nassau

  6/12/25, 6:10 PM

   The THHN (Thermoplastic High Heat-resistant Nylon-coated) is used mainly in dry environments, while THWN (Thermoplastic Heat and Water-resistant Nylon-coated) is suitable for both wet and dry locations. 

  Most modern THHN wire is dual-rated as THHN/THWN-2, making it more versatile for different environments. If you need a specific product reference, don’t hesitate to ask about it here!

   

   

  0 likes 0 likes Liked Like

  ---

  1
  Posts

  228
  Views

  Reply

  ---