For branch lighting and power circuits, where is ENT permitted to be used?

The use of Electrical Non-metallic Tubing (ENT) is specifically permitted in certain areas for branch lighting and power circuits according to the National Electrical Code (NEC) guidelines. When ENT is employed above a suspended ceiling, and that space is not classified as an air-handling space, it complies with the code requirements regarding where this type of tubing can be utilized.

When a suspended ceiling is present but is not part of an air-handling system, the environment allows for the proper installation of ENT, ensuring that the tubing is not subjected to conditions that could compromise its integrity or functionality. ENT is valued for its lightweight, flexibility, and moisture-resistant features, making it a practical choice in dry environments above ceilings where adequate access is maintained for future installations or modifications.

In contrast, the other answers suggest scenarios that either involve inappropriate settings for ENT or conditions that would contravene electrical safety and performance standards. For instance, using ENT in air-handling spaces would contradict guidelines since electrical materials in such locations must prevent any potential for air contamination.