What type of cable is covered in Article 332?

Article 332 of the National Electrical Code (NEC) specifically addresses the requirements for Type MI (Mineral Insulated) cable. This type of cable is designed for the installation of wiring in various environments, particularly where there may be high temperatures or exposure to moisture. MI cable features conductors that are insulated with mineral materials, typically magnesium oxide, which provides excellent thermal properties, resistance to corrosion, and ability to withstand high temperatures.

Type MI cable is often used in applications where traditional insulation might fail, making it suitable for industrial facilities, power plants, and other demanding environments. Understanding the unique characteristics and appropriate applications of MI cable outlined in Article 332 is essential for anyone involved in electrical installations, especially in specialized or high-risk settings. This highlights the importance of recognizing the specific usage and conditions for the different cable types within the NEC framework.