What is the designation for High Density Polyethylene Conduit?

The designation for High-Density Polyethylene Conduit is Type HDPE. High-Density Polyethylene (HDPE) is a thermoplastic polymer known for its high strength-to-density ratio. In electrical and construction applications, HDPE conduit is utilized for its durability, flexibility, and resistance to corrosion, making it suitable for underground installations and areas where high moisture levels are present.

Understanding the designation of HDPE as specialized conduit based on its material properties is important in the context of the National Electrical Code (NEC), as it informs professionals about the suitability of materials for various applications. Other types listed, such as LFNC (Liquidtight Flexible Nonmetallic Conduit), ENT (Electrical Nonmetallic Tubing), and FMT (Flexible Metal Conduit), serve different purposes and are composed of different materials, which do not align with the characteristics and application of HDPE.