Which NEC article pertains to Air-Conditioning and Refrigerating Equipment?

Article 440 of the National Electrical Code (NEC) specifically addresses the requirements for air-conditioning and refrigerating equipment. This article outlines the applicable provisions for the installation, maintenance, and safety considerations associated with this type of equipment. It includes guidelines on the wiring methods, disconnecting means, and branch circuit conductors that are needed to ensure the safe operation of air-conditioning and refrigerating systems.

The focus of Article 440 is on the electrical aspects and safety of these systems, ensuring that they are appropriately designed to handle the electrical loads and conditions they will encounter in operation. This includes considerations for motor branch circuits, overload protection, and proper grounding.

Other articles mentioned, while important in their own contexts, do not primarily focus on air-conditioning and refrigerating equipment. Article 408 relates to switchboards and panelboards, Article 422 addresses appliances in general, and Article 411 is centered around low voltage lighting systems. Therefore, Article 440 is the correct reference for anyone working with or inspecting air-conditioning and refrigerating equipment according to NEC standards.