RMC (Rigid Metal Conduit) and RGS/GRC (Rigid Galvanized Steel/Greenfield Conduit) are not exactly the same thing. While they both serve the same purpose of protecting electrical wires and cables, there are some key differences between the two: Material

RMC is made of steel, while RGS/GRC is made of galvanized steel. Galvanization is a process of applying a layer of zinc to the steel, which helps to protect it from corrosion.

Flexibility

RMC is not flexible, while RGS/GRC is flexible. This makes RGS/GRC easier to install in tight spaces or around corners.*

Cost: RMC is more expensive than RGS/GRC.In general, RMC is used in applications where strength and durability are more important than flexibility, such as in commercial or industrial settings. RGS/GRC is used in applications where flexibility is more important, such as in residential or light commercial settings.So, while RMC and RGS/GRC are both types of rigid conduit, they are not exactly the same thing. There are some key differences between the two that make them better suited for different applications. Flag for review