What type of metal is aluminum classified as when used for Rigid Metal Conduit (RMC)?

Aluminum is classified as a nonferrous metal when used for Rigid Metal Conduit (RMC). Nonferrous metals are those that do not contain significant amounts of iron, and aluminum fits this definition perfectly. This classification is essential for understanding the properties and applications of materials used in electrical installations.

In the context of RMC, aluminum is favored for its lightweight nature, resistance to corrosion, and excellent conductivity, making it an ideal choice for certain installations. By understanding that aluminum is nonferrous, electrical professionals can make informed decisions regarding material selection based on factors like weight, conductivity, and environmental conditions.

This classification also distinguishes aluminum from ferrous metals, which contain iron and are typically more prone to rust and corrosion. The characteristics of nonferrous metals like aluminum contribute significantly to their performance in various applications, especially in environments where moisture is a concern.