Master Electrician Exam 2025 – 400 Free Practice Questions to Pass the Exam

Type AC cable, commonly known as armored cable, cannot be used embedded in plaster in wet locations due to its construction and intended use. Type AC cable is designed for dry locations and is not rated for use in areas that have high moisture levels or where water exposure is likely. When installed in such environments, the risk of deterioration and failure increases, which can lead to hazardous conditions, such as electrical shorts or even fire.

This type of cable is typically suited for dry, protected locations, and although it may resist some moisture, it is not fully waterproof or impervious to corrosion over time in wet environments. Therefore, its use in such settings violates electrical codes that aim to ensure safety by using appropriate types of cabling suited for specific conditions.

In the other scenarios mentioned, Type AC cable is generally acceptable. While exposure to sunlight can be a concern for some cables, Type AC can handle limited exposure if installed properly. Its design isn't inherently compromised by being in underground installations as long as they are protected from water ingress. Lastly, Type AC cable is rated for voltages exceeding 50 volts, making it suitable for a wide range of commercial and residential applications.