NEC 2020 706.21(A) Facilities with Utility Services and ESS
For buildings with both utility services and ESS, plaques or directories must be installed. These directories must clearly identify the locations of power source disconnects for all systems, streamlining inspection and emergency response.
This ensures that anyone working on, or responding to the building can quickly find and isolate every critical energy source, greatly improving safety and code compliance in multi-source electric environments.




