Technical Article

Code Corner: NFPA 70B Infrared Thermography

Codes and Standards – 7.10.2024

by Tyson Bittrich

Infrared thermography, while not new to NFPA 70B, now has detailed guidelines for its use in assessing PV systems. Chapter 30 of the 2023 update explicitly extends the use of this maintenance and assessment tool to photovoltaic (PV) systems — whether you’re evaluating electrical terminations, grounding and bonding, PV strings, modules, or module interconnections.

New requirements, key updates, and revised best practices can be found in:

2023 NFPA 855 “Table 304.5: PV Systems Electrical Tests”
2023 NFPA 855 Chapter 7
2023 NFPA 855 Chapter 9

Join Ryan Mayfield for this Code Corner episode (below) for more help determining whether the temperature anomalies your annual testing might detect are due to normal operation or indicative of more serious underlying issues.

You can also find more of our Code Corner videos on the Mayfield Renewables YouTube channel. Contact us to start a project or learn more.

Interested in learning more through Mayfield Renewables technical education? Check out our individual workshops on codes and standards on our website!

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