What labeling is required for PV system equipment?

Field labels for application are essential in photovoltaic (PV) systems as they provide critical information for installers, inspectors, maintenance personnel, and emergency responders. These labels are part of the safety measures outlined in the National Electrical Code (NEC) for ensuring that all relevant data is accessible at the point of installation and operation. They typically include information such as the system's voltage, main disconnect locations, the presence of DC and AC circuits, and any specific hazards associated with the PV equipment.

By requiring these labels, the NEC aims to enhance safety and facilitate efficient operation and maintenance of PV systems. Proper labeling helps prevent accidents and ensures that everyone interacting with the system understands its components and any potential risks. This is particularly important in emergency situations, where quick identification of critical information can influence a rapid response.

In contrast, the other options do not align with NEC requirements for direct labeling of PV systems. Environmental impact and cost assessment labels are not mandated by the NEC, while location-specific labels may pertain to certain conditions but do not specifically encompass the comprehensive safety and operational information provided by field labels.