Types/Applications of
Steel Conduit and Tubing

Steel conduit has been in use as a "raceway system" for electrical conductors since the early 1900s. The wall thickness and strength of steel make Rigid Metal Conduit, Intermediate Metal Conduit and Electrical Metallic Tubing the wiring methods recognized as providing the most mechanical protection to the enclosed wire conductors. Additionally, a properly installed metal conduit system is recognized by the National Electrical Code® (NEC®) as an equipment grounding conductor. There are three basic types of steel conduit in use today: