Technical Articles and Updates
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The Green Wire Dilemma: Mastering Supply-Side Grounding & Bonding
In this recent Ask Mayfield Anything webinar, host Ryan sits down with Rebekah to talk through helpful diagrams and demystify the requirements in Article 705 and Article 250. Drawing on her practical experience and knowledge from participating in the code-making process, Rebekah provides insight into key 2026 NEC updates, explaining how treating a supply-side connected power source disconnect as a…
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Energy Storage System Requirements: The Evolution of NFPA 855 and UL 9540
The grid’s increasing dependence on intermittent solar and wind resources is a main factor in the expansion of energy storage systems, particularly large-scale installations. Lithium-ion batteries became the dominant solution due to rapidly declining costs and high energy density. However, unlike aqueous electrolyte batteries, lithium-ion chemistries are inherently susceptible to thermal runaway, an uncontrollable self-heating state that produces extreme temperatures…
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Energy Storage System Requirements: 2026 National Electrical Code
As the distributed energy landscape shifts from simple generation to more complex storage and energy management, codes and standards are evolving in tandem. The publication of the 2026 NEC (National Electrical Code), the 2026 NFPA 855 (Standard for the Installation of Stationary Energy Storage Systems), and the 3rd Edition of UL 9540 (Energy Storage Systems and Equipment) has provided new…