Which characteristic is NOT true for Electrical Nonmetallic Tubing (ENT)?

The characteristic that Electrical Nonmetallic Tubing (ENT) is made of solid rigid material is not true. ENT is actually composed of a flexible, lightweight plastic material, which allows it to be easily manipulated, installed, and adapted to various configurations in wiring systems. This flexibility is a key characteristic of ENT, as it enables easy installation in a variety of spaces without the need for extensive tools or additional labor.

In contrast, the other characteristics are accurate. ENT is indeed flame retardant, making it suitable for use in residential and commercial settings where fire safety is a concern. It can also be used in buildings up to three stories high, adhering to the National Electrical Code (NEC) requirements. Additionally, the ability to handle and bend ENT without specialized tools contributes to its popularity among electricians, facilitating quicker installations and adjustments as required.