In which location is AC cable prohibited from being used?

AC cable, or armored cable, is specifically designed to provide protection against physical damage and is typically used in a variety of environments. However, its use in certain conditions is restricted to ensure safety and reliability.

The correct choice indicates that AC cable is prohibited from being used in damp locations. This is due to the risk of moisture infiltration, which can lead to corrosion and degradation of both the cable and its components, potentially resulting in electrical failures or hazards. Damp locations are areas where moisture may be present, which can create unsafe conditions for electrical installations.

In contrast, the use of AC cable is generally permitted in dry locations, where there is no risk of moisture affecting the cable's performance. Wet locations, on the other hand, might have specific types of cables designed to handle water exposure, but AC cable is specifically not suitable due to its design and the materials used that may not withstand prolonged exposure to water.

Overhead locations do not inherently restrict the use of AC cable unless they are also classified as wet or damp. Therefore, understanding the properties and limitations of AC cable in relation to various environmental conditions is essential for ensuring safe electrical installations.