What is the definition of FMC in terms of raceways?

FMC, or flexible metal conduit, is defined as a raceway of circular cross section made of metal. This type of conduit is designed for easy routing and is particularly useful in environments where flexibility is necessary, such as in trade shows or buildings where alterations may need to be made frequently. The metal composition of FMC provides durability and protection for electrical wiring, making it suitable for various applications, including damp locations, as it is generally better at managing environmental challenges than non-metallic options.

In contrast, options that describe rectangular or flat cross sections do not accurately represent FMC, as they refer to other types of raceways that serve different purposes and design specifications. Additionally, a raceway of plastic composition does not align with the characteristics of FMC, as it specifically denotes a metal conduit. Thus, the identification of FMC as a circular metal raceway is critical for understanding its applications and benefits within electrical installations.