Solar Rapid Shutdown Labels: NEC 690.56(C) Placement and Wording Guide
Rapid shutdown signage is the last thing installed and the first thing the inspector looks for. NEC 690.56(C) spells out the wording almost verbatim — which makes it one of the easiest labels to get exactly right.
Important Disclaimer
This article is provided for general informational purposes only and does not constitute legal, safety, or professional compliance advice. Regulations, standards, and codes are subject to change and may be interpreted differently by authorities having jurisdiction (AHJ). Always consult with qualified safety professionals, licensed engineers, or legal counsel to determine the specific requirements applicable to your facility. TagBuilder is not responsible for any actions taken based on this information.
What 690.56(C) Requires
Buildings with PV systems that have rapid shutdown must carry a permanent label at each service equipment location (or an approved readily visible location) telling first responders what the rapid shutdown does. The code specifies a title — "SOLAR PV SYSTEM IS EQUIPPED WITH RAPID SHUTDOWN" — in capital letters at least 3/8″ high, with the applicable diagram/wording for the shutdown type.
Which Variant You Need
| System behavior | Label statement |
|---|---|
| Array-level shutdown (module-level electronics) | "SOLAR ELECTRIC PV PANELS" — conductors outside AND inside the array boundary are controlled |
| Conductor-level shutdown outside array only | Warning that conductors within the array remain energized in sunlight |
| Rapid shutdown switch | "RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM" at the switch itself |
The rapid shutdown switch label goes on or within 3 feet of the switch. Check your code cycle: 2017, 2020, and 2023 editions differ in array-boundary details, and your AHJ decides which applies.
The Rest of the PV Label Set
Rapid shutdown signage rides along with the other NEC 690/705 markings: DC disconnect labels, "DUAL POWER SOURCE" plaques, interconnection point labels, and maximum voltage/current markings. Our complete solar PV label requirements guide covers the full list section by section.
Permanence Is Part of the Requirement
NEC 110.21(B) requires field-applied labels to be suitable for the environment — and a service wall or roof edge is full sun. Printed vinyl reflective labels fade to illegibility in a few years; engraved UV-stable plastic keeps its contrast for the life of the system because the letters are cut into the material, not printed on it. Inspectors have begun flagging faded PV labels at system additions, so permanence protects the re-inspection too.
Engraved rapid shutdown and PV disconnect labels that meet the wording and stay legible in full sun.
Photo credits: "Solar Panels on Punggol HDB flats" by Deoma12 via Wikimedia Commons (CC BY-SA 4.0); "Rooftop Solar at Barnstable Airport" by MassDOT (public domain). Product images: TagBuilder.
