According to NEC Article 328, what voltage rating defines medium-voltage cable?

Medium-voltage cable is defined in the NEC (National Electrical Code) as any cable with a voltage rating of 2001 volts or higher. This classification is critical for various applications, including power distribution in industrial settings and utility services. Understanding this threshold helps ensure that installation and maintenance practices adhere to specific safety regulations, as medium-voltage cables handle significantly higher voltage levels compared to low-voltage cables.

The relationship between voltage levels and cable applications is essential, as it guides professionals in selecting the right type of cable for the job while ensuring safety and regulatory compliance. The definitions in the NEC are set to standardize terminology and prevent misinterpretation, which can lead to unsafe electrical practices or equipment failures.