What does Article 490 cover regarding electrical systems?

Article 490 of the National Electrical Code focuses specifically on 'Equipment Over 600 Volts.' This section provides guidelines and requirements for the installation, maintenance, and operation of electrical equipment that operates at voltages exceeding 600 volts. These requirements are critical since higher voltage systems pose increased risks and hazards, necessitating additional safety measures and standards to ensure the safety of personnel and the reliability of the electrical systems.

This article encompasses various aspects, such as proper installation practices, clearances, accessibility for maintenance, and safety features that must be incorporated into equipment rated over 600 volts. It's essential for electricians and engineers working with high-voltage systems to be familiar with this article, as adhering to these regulations helps prevent accidents, equipment failures, and ensures compliance with the NEC.

The other options, while related to electrical systems, do not accurately capture the primary focus of Article 490. Generators and transformers may have specific sections within the NEC, but they are also covered under different articles or parts. Phase converters have particular considerations but do not fall under the exclusive content of Article 490. Understanding Article 490 is essential for anyone dealing with high-voltage electrical equipment.