Technical Article

Code Corner: Energy Management Systems (2023 NEC 705.13)

Codes and Standards – 4.2.2025

by Tyson Bittrich

In the 2023 National Electrical Code updates, code now defines Energy Management Systems (EMS) and emphasizes a system’s role in controlling both loads and power generation sources to ensure busbars are operating safely. The revised 705.13, in conjunction with 750.30, provides an opportunity for a more streamlined and efficient system design.

An EMS utilizing current transformers to coordinate multiple contributions to busbar amperage.

Whether you’re aimed at managing loads through techniques like load shedding, or taking advantage of time-of-use pricing, jump into this 705.13 edition of Code Corner, where Ryan Mayfield also highlights the evolving role of UL's qualification standard for EMSs. UL 3141 could play a crucial role in streamlining how to ensure safety and interoperability of these systems.

You can also find more of our Code Corner videos on the Mayfield Renewables YouTube channel.

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