What is the primary use of Type RMC?

Type Rigid Metal Conduit (RMC) is primarily used for electrical wiring protection. This conduit is constructed from thick steel, which offers mechanical protection to the wiring inside. It is particularly suitable for environments where there may be physical abuse or hazards that could damage standard wiring systems, such as in industrial settings or outdoor installations.

The robust nature of RMC makes it capable of withstanding harsh conditions, including moisture and chemical exposure, while providing an effective path for electrical grounding when connected properly. Furthermore, the metallic construction of RMC can also help protect against electromagnetic interference, enhancing the reliability of the electrical system it encloses.

Regarding the other options, while grounding is an important aspect of electrical installations, RMC itself is not primarily designed for this purpose, though it can facilitate grounding connections. It does not serve as a conduit specifically for fiber optics, as fiber optic cables typically require different types of conduit that can accommodate their unique needs. Lastly, while RMC can be used in overhead power line applications, its primary designation is not for that specific use, but rather to protect electrical wiring.