What does Electrical Nonmetallic Tubing (ENT) provide for the installation of electrical conductors?

Electrical Nonmetallic Tubing (ENT) serves as a nonmetallic raceway designed specifically for the installation and protection of electrical conductors. It is characterized by its lightweight and flexible nature, making it ideal for various installations, particularly in residential and commercial buildings.

The integral couplings mentioned in the correct answer refer to the ability of ENT to connect easily without needing additional fittings, streamlining the installation process. This design not only allows for easier routing around obstacles but also provides a degree of protection for the conductors within.

The other options describe other types of conduits or raceways, but they do not accurately reflect the properties of ENT. For instance, a metal conduit with protective coating suggests a robust, rigid installation method that does not apply to ENT's characteristics. Similarly, a solid rigid pipe does not capture the flexible nature of ENT, and a flexible cable would lack the structural protection that ENT offers for conductors, which is essential for maintaining electrical safety and integrity.