Electrical Nonmetallic Tubing (ENT). A nonmetallic, pliable, corrugated raceway of circular cross section with integral or associated couplings, connectors, and fittings for the installation of electrical conductors. ENT is composed of a material that is resistant to moisture and chemical atmospheres and is flame retardant.

As best I can tell, the National Electrical Code 2011 allows electrical non-metallic tubing ("smurf tube" or ENT) to be used for running 120 V electrical wire.

Electrical Nonmetallic Tubing (ENT) is designed to replace EMT, flexible metal conduit or other raceway systems in accordance with Article 331 of the National Electrical Code, other applicable sections of the Code and local codes. ENT shall be recognized by The National Evaluation Service, Inc. for use in fire resistive construction.

Chapman Electric offers a selection of pipe and conduit to meet your electrical or underground project needs. The NEC sets standards for the percent of volume that can safely be put into conduit. The below chart is from Table 1 in Chapter 9 of the National Electric Code.

2024年6月19日 · UL 1653 is the recognized standard for Electrical Nonmetallic Tubing (ENT). This standard outlines the safety and performance requirements for ENT products, including specifications for dimensions, construction, materials, and testing methodologies.

Here we describe the various types & applications of ENT or LNFC (liquid tight) non-metallic electrical conduit made of plastic, PVC. This article series describes both metallic electrical conduit and plastic or non-metallic electrical conduit products, and answers basic questions about installing electrical conduit.

2024年11月25日 · Electrical Nonmetallic Tubing (ENT) is a flexible, lightweight conduit used to protect and route electrical wires in both residential and commercial applications. Made from polyvinyl chloride (PVC) or other flame-retardant plastics, ENT is designed to be easily bendable and is resistant to impact, moisture, and chemical exposure.

2023年11月9日 · Electrical Nonmetallic Tubing (ENT) is a type of conduit used for electrical installations. It is a flexible, corrugated tube made of a non-metallic material, typically a high-quality plastic such as PVC (polyvinyl chloride).ENT conduit offers several advantages over traditional metallic conduits.

ENT was designed as an in-building product (see Article 362 of the 2002 NEC). Since ENT does not have ultraviolet (UV) inhibitors added to the PVC compound such as our rigid PVC conduit, it is more affected by the ultraviolet rays from the sun.

Our NEC Conduit Fill Chart for ENT Conduit calculates THWN, THHN, and THWN-2 wire fill maximum numbers for ENT (Electrical Non-Metallic Tubing) or Flex Conduit pipe using conduit trade size in inches and AWG or MCM wire size.