Solar Signage - NEC #690

The National Electrical Code (NEC) Section 690 of the NEC specifies requirements for labeling PV systems. There are multiple labeling requirements, and they are spread out among several subsections. Label requirements will vary from city-to-city. A copy of the label guidelines are usually available at the City Hall where the permits are pulled.

The labels are required to be out of a durable, unalterable material (1/16” plastic RED engraved to WHITE) permanently attached to the device.
Examples where your city may require labels as cited from the NEC Code 690 include:

  • DIRECTORY or FLOOR PLAN of the installation premises.
  • At the DC Disconnect, noting that the line and load sides may be energized in the open position.
  • PV power source information be posted at the DC disconnect, which can also be part of the inverter.
  • Rated maximum Power-point current, rated maximum power-point voltage, maximum system voltage, and short-circuit current.
  • If there is more than one PV DC Disconnect, they should also be labeled.
  • The AC Disconnect—stating the rated AC output current and nominal operating AC voltage.
  • At the location of the ground-fault protection, normally at the inverter, warning of a shock hazard.
  • Where the solar-electric system interconnects to the utility.
  • Photovoltaic systems that include batteries have a few other labeling requirements.
  • It is a good idea to also label other DC enclosures, the utility disconnect, and combiner boxes with fuses.
  • At the utility meter that there is a PV system connected.

Please e-mail with your needs aSOURCEofPRIDE.biz You will be contacted to discuss and confirm your order.

  • Your contact information and job name - if applicable
  • Label Text
  • Label Size Restrictions - if any
  • Font point size (3/8” high letters Minimum is typical) requirements – if any
  • Quantity
  • Timing or Deadline when needed

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