RMC stands for Rigid Metal Conduit, which is a type of electrical conduit used to protect and route electrical wiring in a building or structure. RMC cable is a term that is sometimes used to refer to the electrical wiring that is installed inside RMC conduit. RMC conduit is made of metal and is rigid, which provides a high level of protection for the electrical wiring inside. This type of conduit is commonly used in commercial and industrial applications where the wiring needs to be protected from damage and exposure to the elements.