What material is specified for conduits in hazardous locations according to NEC guidelines?

In hazardous locations, the National Electrical Code (NEC) specifies that conduits should be made of materials that can withstand potential environmental hazards, such as explosive gases or flammable dusts. Steel is the preferred choice for conduit material in such situations due to its durability, strength, and resistance to physical damage. Steel conduits provide a robust barrier that is crucial for protecting electrical wiring in unsafe environments, minimizing the risk of accidental ignition of flammable materials.

The properties of steel also include its ability to handle high pressures and resist corrosion, especially when treated with appropriate coatings. These characteristics are essential for ensuring safety and compliance in hazardous areas. While other materials like plastic, aluminum, and copper have their applications, they may not meet the stringent requirements of the NEC for hazardous locations as effectively as steel does.