Where can ENT be used in an exposed condition?

The correct answer is based on understanding the context in which ENT (Electrical Nonmetallic Tubing) is permissible for use when exposed to the environment. ENT can indeed be used in various conditions, including above suspended ceilings, where it is protected from physical damage and allow for electrical wiring to be neatly and safely routed.

While ENT is suitable for above suspended ceilings, it is also applicable for other scenarios. For example, in exterior applications, ENT can be exposed to environmental factors; it is designed to resist moisture and corrosion, making it ideal for outdoor settings. Additionally, it is permissible in attic spaces, as long as it is not subjected to physical damage.

Taking these considerations into account, the best response captures the full range of appropriate environments where ENT can be utilized when exposed. The inclusion of attic spaces and exterior applications, along with areas above suspended ceilings, highlights the versatility of ENT in meeting code requirements across different settings. Thus, recognizing that it's applicable in all these scenarios reflects a comprehensive understanding of the material's intended use.