Article 410 primarily focuses on which of the following components?

Article 410 of the National Electrical Code (NEC) deals specifically with luminaires, lampholders, and lamps. This article sets the standards for the installation, use, and safety of lighting fixtures, which encompasses a wide range of equipment including stationary and portable lighting components.

Luminaires are the complete lighting units that provide illumination, and lampholders are the fixtures that hold the lamps (light bulbs) in place. Proper adherence to the codes outlined in Article 410 ensures that lighting installations are safe, properly wired, and effectively functional according to industry standards. This includes guidelines on mounting, wiring methods, protection against moisture, and other safety measures essential for electrical systems that involve lighting.

In contrast, the other options focus on different areas of electrical systems such as motors, heating equipment, and air-conditioning systems, which fall under separate articles within the NEC dedicated to those specific components. Thus, Article 410's focus is uniquely on components that contribute to lighting, making it the relevant article for the inquiry.