What type of equipment is addressed in Article 490?

Article 490 of the National Electrical Code (NEC) specifically addresses equipment that operates with voltages that exceed 600 volts, nominal. This article outlines the safety requirements and installation practices for electrical equipment that handles high voltage levels, which are crucial for ensuring safety in industrial and commercial environments where higher voltage systems are used.

The guidance provided in this article pertains to the design, installation, and maintenance of electrical equipment under conditions that exceed the standard 600-volt levels, which requires additional considerations due to the risks associated with higher voltage systems.

While Class I locations, generators, and storage batteries are important topics within the NEC, they are covered under different articles. Class I locations pertain to hazardous locations that contain flammable gases or vapors, while Article 750 focuses on storage batteries and Article 219 often addresses generator installations. Thus, the context of the question clearly aligns with the scope outlined in Article 490, confirming that equipment over 600 volts, nominal, is the primary focus.