Photovoltaic inverter safety labeling diagram

Do PV systems need labels and warning signs?

Installers should consult the National Electricians Code (NEC) regarding PV systems and any local regulations from cities and municipalities. The basic parts of a PV system that need labels and warning signs include the following: Now that we know what needs labeling, we’ll explore the PV labeling requirements that installers need to know.

Do I need a warning label on my PV inverter?

Section 690.5 covers the ground fault detection/interruption for the PV system and requires a warning label on the utility-interactive inverter or near the ground-fault indicator at a visible location. Most often, these labels are applied on the inverter by the manufacturer. See Figure 1. Figure 2.

What are the PV system marking and labeling requirements?

Here is a quick summary of PV system marking and labeling requirements. Section 690.5 covers the ground fault detection/interruption for the PV system and requires a warning label on the utility-interactive inverter or near the ground-fault indicator at a visible location. Most often, these labels are applied on the inverter by the manufacturer.

Where can I find a label for a PV inverter?

Section 690.54 requires a label at the point where the PV system interconnects to other sources such as the premises wiring system. The label must have the rated ac output current and the nominal operating ac voltage. This rated ac output current can be found on the inverter nameplate. See Figure 6.

Why are labeling requirements important for PV systems?

Before we get into the labeling requirements for PV systems, it’s worth noting why these labels are important for installers and owners of PV systems. There’s always the danger of short circuits, arc flashes, and fires to installers and anyone nearby if they’re not careful.

How do you label a PV system?

The label shall be reflective, with all letters capitalized and having a minimum height of 3/8 in., in white on red background. A permanent readily visible label indicating the highest maximum dc voltage in a PV system, calculated in accordance with 690.7, shall be provided by the installer at one of the three locations.