Where should a permanent label indicating the highest maximum dc voltage in a PV system be provided?

The permanent label indicating the highest maximum DC voltage in a photovoltaic (PV) system is required to be located at the DC PV system disconnecting means. This positioning is crucial because it ensures that anyone who operates or works on the PV system has immediate access to the voltage information. The disconnecting means is a critical point where personnel may make operational changes or conduct maintenance, and having the maximum voltage information right there enhances safety.

By placing this label at the disconnect, it provides an essential safety measure to inform workers of the maximum DC voltage they may encounter, thereby minimizing the risk of electric shock or equipment damage. This requirement aligns with the NEC's emphasis on safety and clear communication of potential hazards in electrical installations.