When must EMT be corrosion-resistant?

Electrical Metallic Tubing (EMT) must be corrosion-resistant when installed in wet areas due to the potential exposure to moisture, which can lead to deterioration of the metal and compromise the integrity of the electrical system. The protective coating or the use of materials that resist corrosion ensures that EMT continues to provide the necessary mechanical protection for conductors, as well as maintain safety and operational reliability over time. In wet locations, which are defined by the National Electrical Code (NEC) as areas where water can accumulate in such a manner that it is likely to come in contact with the electrical raceway, special care must be taken to select materials that can withstand such conditions. Using corrosion-resistant EMT is crucial for preventing rust and degradation that could lead to system failure or safety hazards, ensuring the longevity and functionality of the electrical installation.