Metric units of measurement are discussed in which article of the NEC?

Metric units of measurement are specifically addressed in Article 90 of the National Electrical Code (NEC). This article outlines the scope, purpose, and applicability of the code, including the permissible methods for measurement and the types of units recognized. In particular, Article 90 informs users that metric measurements are accepted, thereby facilitating the adoption of international standards and improving clarity in situations where both imperial and metric systems are utilized.

By including metric units, the NEC aims to accommodate a wider range of practices and preferences, ensuring that electrical installations can meet modern, global standards. This shows the code's commitment to evolving with technology and practices, making it more user-friendly for electricians working in diverse environments.

While other articles in the NEC cover specific aspects of electrical installations, they do not focus primarily on units of measurement like Article 90 does. This makes Article 90 crucial for understanding how measurements should be interpreted within the context of the entire code.