What Is The Difference Between THWN And THWN-2?

THWN Wire

THWN wire stands for Thermoplastic Heat and Water-resistant Nylon Coated Wire. This type of wire is typically used in wet locations, where it may be exposed to different elements. As the name suggests, it is made with a thermoplastic insulation coating, which makes it heat-resistant. The nylon coating provides additional protection against water, oil, and other chemicals that may be present in wet conditions.

THWN-2

THWN-2 is an enhanced version of the THWN wire. The "2" at the end of its name indicates that it is a newer specification. THWN-2 has additional features that improve its performance. Like THWN wire, it has a thermoplastic insulation coating that makes it heat-resistant. It also has a nylon coating that provides protection against water, oil, and other chemicals.

The main difference between THWN and THWN-2 is the thickness of their insulation coating. THWN-2 has a thicker insulation coating than THWN wire. This makes it more durable and resistant to wear and tear. The thicker insulation coating also provides better protection against moisture and other contaminants that may be present in wet locations.