Code Change Summary: Revised terminology in 445.19(B) replaces “remote emergency stop” with “shutdown device” and reorganizes the section into a list for improved clarity.

SME commentary: In the 2026 NEC^®, Section 445.19(B) has been restructured to improve usability and broaden the types of acceptable technology for generator shutdown. The previous requirement for a “remote emergency stop switch” has been replaced with the term “remote shutdown device.” This revision acknowledges that not all systems use traditional mechanical stop switches and that other types of controls, such as digital interfaces or network-based systems, may perform the same safety function effectively. The revised section also adopts a clearer list format to outline the installation and marking criteria for these devices.

Under the revised language, generators rated over 15 kW in other than one- and two-family dwellings must include a remote “shutdown device” that complies with the same existing four distinct provisions. The device must be located outside the equipment room or on the exterior of the generator enclosure, located where it is readily accessible, marked “Generator Emergency Shutdown” using a label complying with 110.21(B), and meet the requirements found in and 445.19(A)(1) and (A)(2). These updates preserve the same safety intent as previous editions while accommodating evolving control technologies.

The 2023 NEC^® language in 445.19(B) focused narrowly on a “remote emergency stop switch,” which implied a manual, contact-based device. This language did not reflect the broader range of generator control systems now available in the field, including those that can initiate a stop signal through electronic or remote-control circuitry. The use of “shutdown device” expands the range of permissible technology while ensuring that the location, accessibility, and labeling remain consistent with safety expectations.

In practical terms, installers should recognize that the required device may still take the form of a physical switch, but it may also be part of a listed electronic control assembly that performs an equivalent shutdown function. The installation and marking requirements ensure that emergency personnel and qualified operators can still identify and operate the shutdown mechanism quickly in the event of a malfunction or hazard.

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:

445.19(B) Remote Emergency Shutdown. For other than one- and two-family dwelling units, generators with greater than 15 kW rating shall be provided with a remote emergency stop switch to shut down the prime mover. The remote emergency stop switch shall be located outside the equipment room or generator enclosure at a readily accessible location and shall also meet the requirements of 445.19(A)(1) and (A)(2).

2026 Code Language:

445.19(B) Remote Emergency Shutdown. For other than one- and two-family dwelling units, generators with greater than 15 kW rating shall be provided with a remote shutdown device. The remote shutdown device shall comply with all of the following: (see the actual NEC^® for remaining text)