Article 440 is concerned with which type of equipment?

Article 440 of the National Electrical Code (NEC) specifically addresses the installation and requirements for air-conditioning and refrigerating equipment. This section outlines the necessary parameters for the safe and effective operation of such systems, including motor branch circuits, disconnecting means, overload protection, and overall installation guidelines to ensure compliance and safety.

The standards set forth in Article 440 are essential for ensuring that the equipment operates efficiently and safely, minimizing the risk of hazards such as electrical fires or equipment failures. The focus is on the wiring and controls associated with these systems, providing a framework for electricians to follow during design and installation.

In contrast, the other options pertain to different aspects of electrical installations. Fixed electric space-heating equipment is covered in a separate section, whereas industrial control panels fall under other regulations within the NEC. Appliances are also addressed through different articles focusing on residential and commercial applications but not specifically the air-conditioning and refrigerating aspects highlighted in Article 440.