Article 404 is associated with which component in electrical systems?

Article 404 of the National Electrical Code (NEC) specifically covers the requirements for switches and their associated components. This article outlines how switches must be installed, their ratings, the types of switches permitted, and the various configurations and wiring methods allowed. It is essential in ensuring that electrical switches are used safely and effectively within electrical systems.

In the context of the options provided, switches are devices that control the flow of electricity by opening or closing a circuit. Article 404 emphasizes safety and functionality standards for installation, including placement, grounding, and accessibility. Understanding this article is crucial for anyone involved in electrical installation or maintenance, as it directly impacts how switches are used in residential and commercial settings.

The other options relate to different aspects of electrical installations. Receptacles (A) are addressed under a different article in the NEC, as are cable trays (C) and fixture wires (D), which are covered in their respective sections of the code, highlighting the specificity of each article to its relevant components. This distinction emphasizes the importance of referencing the correct article when dealing with various electrical parts.