What type of cable is referenced in Article 328?

Article 328 of the National Electrical Code (NEC) specifically addresses Medium Voltage (MV) cables, which are designed for applications that operate at voltages typically ranging from 1,000 volts to 35,000 volts. These cables are essential for power distribution in a variety of settings, including industrial environments and utility systems.

Understanding the specific characteristics of Medium Voltage cables, such as their insulation properties, construction, and suitability for underground or aerial installations, helps ensure safety and reliability in electrical infrastructure. MV cables are typically more robust and designed to withstand harsher environments compared to other cable types, which may not be rated for such high voltage applications.

In contrast, other cable types mentioned, like Type MC (Metal Clad), Type NM (Non-Metallic Sheathed), and Type UF (Underground Feeder), serve different purposes and are designed for lower voltage applications or specific installations, which do not fall under the scope of Article 328. This distinction emphasizes the importance of selecting the appropriate cable type based on voltage ratings and installation requirements.