How are the types of conductors used in PV systems classified?

The classification of conductors used in photovoltaic (PV) systems as flexible, rigid, and wet-nonmetallic types is correct because it reflects the physical properties and specific applications of the conductors in various environmental conditions. Flexible conductors allow for easier installation and can accommodate movement, making them suitable for areas where flexibility is required. Rigid conductors provide structural support and are often used in more permanent installations where movement is less of a concern.

Wet-nonmetallic conductors are specifically designed to withstand exposure to moisture, making them ideal for outdoor or exposed applications typical of PV systems. This classification emphasizes the importance of selecting appropriate conductors based on environmental conditions and installation requirements, ensuring safety and longevity in the photovoltaic setup. Proper understanding and selection of conductor types based on their classification leads to optimal system performance and compliance with safety standards outlined in the National Electrical Code (NEC).