Which type of systems are considered special equipment and covered in Chapter 6 of the NEC?

Chapter 6 of the National Electrical Code (NEC) specifically focuses on special equipment that has unique installation or operational requirements due to its specific applications or characteristics. Electric welders and solar photovoltaic systems are considered special equipment because they involve specialized electrical systems that operate under specific regulations and standards to ensure safety and efficiency.

Electric welders use high currents and generate intense heat, which necessitates specific considerations for electrical wiring and installation to prevent hazards. Similarly, solar photovoltaic systems involve unique configurations, including inverters and battery storage, that require adherence to distinct electrical code sections to address system integration, energy conversion, and potential fire hazards.

Telecommunications systems, conventional lighting systems, and low-voltage wiring systems do not fall under the same category as special equipment outlined in Chapter 6, because they do not exhibit the unique electrical properties or requirements that necessitate specialized treatment and regulations. Therefore, electric welders and solar photovoltaic systems are the appropriate examples of the systems covered in this chapter.