Which article details the requirements for switches?

The correct answer is B, as Article 404 of the National Electrical Code (NEC) specifically addresses the requirements for switches. This article covers various aspects related to switches, including their installation, ratings, types, and other important considerations to ensure safety and proper functionality in electrical systems. Understanding Article 404 is crucial for anyone involved in electrical installations, as it ensures that switches are used appropriately in accordance with the NEC, which is aimed at safeguarding people and property.

On the other hand, Article 400 pertains to flexible cords and cables, Article 392 deals with cable trays, and Article 406 outlines the requirements for receptacles, cord connectors, and attachment plugs. Each of these articles focuses on different components and regulations within electrical systems, emphasizing the specific relevance of Article 404 to switches.