What is the main purpose of Chapters 5, 6, and 7 in relation to the NEC?

The main purpose of Chapters 5, 6, and 7 in relation to the National Electrical Code (NEC) is to modify or supplement previous chapters. These chapters introduce specific provisions and requirements that address unique aspects of electrical installations that may not be fully covered in earlier sections of the NEC. By doing so, they enhance the overall framework of the code by accommodating additional practices and technologies, thereby ensuring safety and compliance in diverse applications.

This focus on modification and supplementation allows for a more comprehensive understanding of different electrical systems and the intricacies involved in their installation and use. Chapters 5, 6, and 7 cover various specialized topics, making them critical for practitioners who need to adhere to the latest safety standards and practices relevant to non-residential, industrial, and other specific installations.