What does Section 690.4 address regarding PV systems?

Section 690.4 of the National Electrical Code (NEC) specifically addresses circuit sizing and overcurrent protection for photovoltaic (PV) systems. This section outlines the requirements for the conductors and overcurrent devices to ensure that they can safely handle the current produced by the PV modules under various conditions.

The significance of circuit sizing is highlighted in this section because it ensures that the electrical components can handle the maximum potential output from the solar panels, considering factors like temperature and other environmental conditions that can affect performance. Proper overcurrent protection is essential to prevent damage to the PV system and connected equipment from overloads or faults.

Other aspects, such as module placement and orientation, maintenance requirements, or labeling of PV panels, are covered in different sections of the NEC or other guidelines but are not addressed specifically in Section 690.4. Thus, while they may be important for the installation and operation of PV systems, they do not pertain to the focus of this particular section.