Solar Electrical Disconnect and Grounding Verification Checklist [FREE PDF]

Solar PV disconnect and grounding verification is mandated under NEC Article 690 and NFPA 70, requiring accessible, labeled disconnects and continuous equipment grounding to protect personnel and property. IEC 62446 further specifies commissioning test requirements for isolation resistance and continuity verification before system energization. Proper documentation of disconnect and grounding compliance is essential for utility interconnection approval, AHJ sign-off, and ongoing O&M safety proto

  • Industry: Solar Installation
  • Frequency: Per Event
  • Estimated Time: 45-60 minutes
  • Role: Electrical Inspector
  • Total Items: 36
  • Compliance: NEC Article 690.13 - PV System Disconnecting Means, NEC Article 690.47 - Grounding and Bonding, NFPA 70 Article 250 - Grounding and Bonding, IEC 62446-1 Grid Connected PV Systems Testing, UL 1741 Inverter and Charge Controller Standard

DC Disconnect Location and Accessibility

Verify DC disconnect switches are properly located, accessible, and meet NEC 690.13 placement requirements.

  • Is the DC disconnect located within sight of the inverter or at the point of entry to the structure?
  • Is the DC disconnect rated for the maximum system voltage and current?
  • Is the DC disconnect accessible without the use of tools or climbing?
  • Is the DC disconnect operable without exposing the operator to energized parts?
  • Please photograph the DC disconnect location and label?

DC Disconnect Labeling and Markings

Confirm all required warning labels and identification markings are present, legible, and correctly located on DC disconnect equipment.

  • Does the DC disconnect display a 'PV SYSTEM DISCONNECT' or equivalent label?
  • Is a SHOCK HAZARD warning label present and clearly visible on the disconnect enclosure?
  • Is the maximum system DC voltage posted on or near the disconnect?
  • Are all labels made of durable, weather-resistant material?
  • Are any labels missing, damaged, or illegible?

AC Disconnect Verification

Verify AC disconnect means including utility disconnect, inverter output disconnect, and service entrance disconnect compliance.

  • Is a dedicated AC disconnect installed between the inverter output and the utility interconnection point?
  • Is the AC disconnect rated for the inverter AC output current and voltage?
  • Is the AC disconnect lockable in the open position?
  • Is the utility-required AC disconnect visible and accessible to utility personnel?
  • Please photograph the AC disconnect and its labeling?

Equipment Grounding and Bonding

Verify continuous equipment grounding conductors, grounding electrode systems, and module frame bonding per NEC 690.47 and Article 250.

  • Is an equipment grounding conductor (EGC) present and continuous from the modules to the inverter and main panel?
  • Is the EGC properly sized according to the PV circuit overcurrent protection device rating?
  • Are all module frames bonded together using listed bonding hardware or integrated bonding clips?
  • Is the grounding electrode conductor (GEC) connected to an approved grounding electrode system?
  • Is the GEC properly sized and connected without splices or excessive length?
  • Is the ground continuity resistance measured and documented below 1 ohm?

Rapid Shutdown System Verification

Verify rapid shutdown system compliance including initiators, controlled conductors, and labeling per NEC 690.12.

  • Is a rapid shutdown system (RSS) installed and compliant with NEC 690.12?
  • Is the rapid shutdown initiator (RSI) clearly labeled and accessible to emergency responders?
  • Does the rapid shutdown system reduce array boundary conductor voltage to 30V or less within 30 seconds?
  • Is the RSS initiator tested and confirmed to activate the shutdown sequence?
  • Is the required rapid shutdown diagram label posted at the main service panel or meter?

PV Conductor and Wiring Inspection

Inspect PV system wiring methods, conductor types, conduit fill, and protection to ensure code-compliant installation.

  • Are all conductors within the PV array listed and rated for PV use (USE-2 or PV Wire)?
  • Are PV conductors protected from physical damage by conduit, raceways, or approved support methods?
  • Are all conduit penetrations through the roof or structure properly sealed against moisture?
  • Are all MC4 or other PV connectors properly mated, locked, and of the same manufacturer/series?
  • Please photograph the wiring installation at the combiner box or inverter DC input?

Final Documentation and Sign-Off

Complete inspection documentation, record any deficiencies, and confirm system is ready for commissioning or has documented corrective actions.

  • Are all as-built drawings and single-line diagrams available and accurate?
  • Have all identified deficiencies been documented with corrective action notes?
  • Please describe any deficiencies or non-conformances observed during this inspection?
  • Is the system approved to proceed to energization based on this inspection?
  • Please photograph the completed installation overview including all major equipment?

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Why Use This Solar Electrical Disconnect and Grounding Verification Checklist [FREE PDF]?

This solar electrical disconnect and grounding verification checklist [free pdf] helps solar installation teams maintain compliance and operational excellence. Designed for electrical inspector professionals, this checklist covers 36 critical inspection points across 7 sections. Recommended frequency: per event.

Ensures compliance with NEC Article 690.13 - PV System Disconnecting Means, NEC Article 690.47 - Grounding and Bonding, NFPA 70 Article 250 - Grounding and Bonding, IEC 62446-1 Grid Connected PV Systems Testing, UL 1741 Inverter and Charge Controller Standard. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Solar Electrical Disconnect and Grounding Verification Checklist [FREE PDF] cover?

This checklist covers 36 inspection items across 7 sections: DC Disconnect Location and Accessibility, DC Disconnect Labeling and Markings, AC Disconnect Verification, Equipment Grounding and Bonding, Rapid Shutdown System Verification, PV Conductor and Wiring Inspection, Final Documentation and Sign-Off. It is designed for solar installation operations and compliance.

How often should this checklist be completed?

This checklist should be completed per event. Each completion takes approximately 45-60 minutes.

Who should use this Solar Electrical Disconnect and Grounding Verification Checklist [FREE PDF]?

This checklist is designed for Electrical Inspector professionals in the solar installation industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.

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