The difference between THHN and XHHW

• Wire
• Cable
• Electrical
• THHN
• XHHW

• 

  Jorge Rojas

  11/15/24, 6:32 PM

  THHN Wire (Thermoplastic High Heat-Resistant Nylon-Coated) Temperature Rating: Handles up to 90°C in dry locations, making it ideal for indoor wiring. Insulation: Features a thin, nylon-coated insulation, providing flexibility and making it easy to pull through conduit. Voltage: Rated up to 600 volts, suitable for standard building applications. Uses & Applications: Residential and commercial settings, particularly for indoor electrical wiring and conduit installations where moisture protection isn’t essential.

  XHHW Wire (Cross-Linked High Heat Water-Resistant Wire) Temperature Rating: Rated up to 90°C in dry locations and 75°C in wet conditions, indoor and outdoor environments. Insulation: Cross-linked polyethylene (XLPE) insulation provides extra thickness and durability, ensuring high moisture resistance and robustness. Voltage: Rated up to 600 volts, like THHN, but more resilient under harsh conditions. Uses & Applications: Ideal for outdoor or damp environments, commonly used for industrial and commercial applications that involve water exposure or direct burial.

   

  Understanding the key differences between THHN and XHHW wires can help you make the right choice for your project’s environment and demands. THHN wire is suitable for dry indoor locations, as it features lightweight, thin insulation that is ideal for conduit installations. It is more affordable, making it an economical choice for simpler indoor wiring projects.

  On the other hand, XHHW wire is designed to handle wet or outdoor conditions due to its thicker, cross-linked insulation, which provides both water resistance and durability in more challenging environments. With a higher cost, the XHHW is ideal for demanding applications or areas exposed to moisture. In summary, THHN works best for indoor, cost-effective projects, while XHHW is the better choice for outdoor, damp, or high-heat settings and industrial applications where durability is critical.

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