What is the purpose of the NEC's "Article 90"?

The purpose of the NEC's Article 90 is to provide the purpose and scope of the National Electrical Code (NEC). This article establishes the framework for understanding the entirety of the code, including its intent, application, and the underlying principles that guide electrical installations. Article 90 clarifies that the NEC is designed to ensure safe electrical design, installation, and maintenance, thus serving as a foundational element for understanding subsequent articles and requirements within the code. This foundational overview is crucial for anyone working with electrical installations as it lays out the philosophy and objectives that govern the safe use of electricity.