Code Change Summary: Language on identifying other source disconnects was relocated from 230.85(D) to 230.70(D) and updated for clarity.

SME commentary: In the 2026 NEC^®, the provisions that previously appeared in Section 230.85(D) regarding identification of disconnecting means for other energy sources have been deleted and relocated to Section 230.70(D). The revision not only shifts the location of the rule but also clarifies the expectation for labeling and identification when multiple power sources are present at a building or structure.

The purpose of this revision is to enhance consistency and usability. Previously, Section 230.85 established requirements for emergency disconnects in one- and two-family dwellings and included a subsection requiring identification of other energy source disconnects. With the deletion of 230.85, this identification requirement was appropriately located within 230.70, which governs service disconnecting means. The revised 230.70(D) now applies to all buildings and structures with a service and provides a central location for these rules, ensuring installers, inspectors, and first responders understand exactly where such identification requirements are located in the Code.

The practical need for this rule becomes evident during emergencies. Many premises today are served by more than one power source. In addition to the normal utility service, buildings may also have standby generators, photovoltaic systems, wind turbines, or battery energy storage systems. When a first responder arrives to shut down power, it is natural to assume that disconnecting the main service disconnect will de-energize the building. However, if alternate power sources remain connected, the potential for dangerous backfeed conditions may exist.

To mitigate this hazard, 230.70(D) now requires that where equipment for disconnecting other energy sources is not located adjacent to the service disconnect, a plaque or directory identifying the location of all equipment for disconnecting other energy sources shall be located adjacent to the service disconnect. Having this plaque or directory helps first responders and service personnel to quickly and easily locate them.

For example, if a building has a utility service disconnect at one end of the structure and a standby generator disconnect at another location, the service disconnect must include a plaque indicating where the generator disconnect is located. Without this, a responder could mistakenly believe that shutting off the service disconnect has de-energized the entire facility.

This relocation and clarification not only improves usability of the NEC^® but also provides greater safety for those who need to respond quickly during an emergency. A properly installed plaque or directory ensures that all disconnecting means are identified in a consistent manner and reduces the likelihood of delay or confusion during critical moments.

The end result is improved coordination of disconnecting means, reduced risk of shock or fire from overlooked energy sources, and better alignment of the Code with modern electrical systems that frequently involve multiple power supplies.

Below is a preview of the NEC^®. See the actual NEC^® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2026 NEC^® edition of NFPA 70.

2023 Code Language:

230.85(D) Identification of Other Isolation Disconnects. Where equipment for isolation of other energy source systems is not located adjacent to the emergency disconnect required by this section, a plaque or directory identifying the location of all equipment for isolation of other energy sources shall be located adjacent to the disconnecting means required by this section.

Informational Note: See 445.18, 480.7, 705.20, and 706.15 for examples of other energy source system isolation means.

2026 Code Language:

N 230.70(D) Identification of Other Source Disconnects. Where equipment for disconnection of other energy source systems is not located adjacent to the service disconnect required by this section, a plaque or directory identifying the location of all equipment for disconnection of other energy sources shall be located adjacent to the service disconnect.

Informational Note: See 445.18, 480.7, 705.20, and 706.15 for examples of other energy source system disconnection means.