Which article covers receptacles, cord connectors, and attachment plugs?

The correct choice addresses Article 406 of the National Electrical Code (NEC), which specifically covers receptacles, cord connectors, and attachment plugs. Article 406 provides guidelines for the installation and use of these devices, ensuring they are safe and functional. This article includes requirements for various types of receptacles, including configurations, grounding, weatherproofing, and tamper resistance. Understanding the details in Article 406 is essential for electricians and supervisory personnel to ensure compliance with safety standards in electrical installations, particularly when connecting electrical devices to the power supply through plugs and receptacles.