Where is the installation of Type AC cable typically allowed?

Type AC cable, also known as armored cable, is designed for use in a variety of environments, but it is specifically recognized for its application in dry locations. This is due to its construction, which includes a metal sheath that provides physical protection but is not designed to withstand moisture over long periods. When installed in dry locations, the cable can be protected from physical damage and is subject to fewer risks associated with corrosion and electrical hazards.

In contrast, wet and damp areas are not suitable for Type AC cable because moisture can compromise the integrity of the cable and lead to potential failure or safety issues. Additionally, while it can be used indoors, it is not restricted solely to indoor applications, as it can also be used in permitted outdoor installations as long as they are in compliant dry conditions. Underwater installations are not allowed because the cable's construction does not provide adequate protection against the hazards of prolonged exposure to water.