Quick Hits

Episode 4: Disconnecting Means, Grounding & System Labeling (690.13 – 690.56)

SLIDE 1 (HOOK / COVER) ⚡ NEC Quick Hit: PV Disconnects, Grounding & Labeling (Part 4) ⚡ 

Where must PV system disconnects be placed? What warning placards are mandatory on service equipment? Let's finish Article 690! 👇

SLIDE 2 (DISCONNECTING MEANS & GROUPED LOCATIONS)

Isolating the PV System:

• Readily Accessible: Disconnecting means must be installed to isolate all conductors of a PV system from other wiring sources.

• Grouping: DC and AC disconnects should be grouped together or clearly marked so technicians can isolate the inverter and array feed points safely.

SLIDE 3 (MANDATORY LABELING & PLACARDS)

First Responder Signage:

• Service Equipment Placard: Permanent placards (such as the building rapid shutdown label per 690.12(D)) must be posted at service equipment detailing the presence of a solar PV system.

• Conduit Markings: Exposed DC conduits, raceways, and enclosures must be marked with periodic warning labels indicating a photovoltaic power source.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: Missing or faded DC conduit warning labels are one of the most common reasons residential solar inspections fail. Ensure high-contrast, reflective DC warning labels are spaced correctly along every exposed raceway run and junction box!

💬 Save this post for your final code review on solar photovoltaic systems! 🔗 

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