Just came across this in the "Washington Cities Electrical Code", April 1, 2024.
Quote:
110.16 Arc-Flash Hazard Warning
Article 110.16 of the National Electrical Code is amended and supplemented by the addition of
the following text to the end of the first paragraph, to read as follows:
The flash protection marking shall be an identification plate or label meeting ANSI
Standards Z535.4-1998 or be of a type approved by the Code Official or designated
representative. The plate or label may be installed at the factory or in the field. The plate
or label may be mounted using adhesive. The plate or label shall include all of the
following:
1) The date of the flash hazard analysis.
2) The flash hazard category.
3) The incident energy level in cal/cm2 at 18 inches from the flash hazard.
4) The flash hazard boundary.
5) The personal protective equipment that people within the Flash Hazard Boundary
shall use.
The arc flash hazard shall be updated when a major modification, renovation or changes
in the electrical distribution system that could affect the results of the arc flash hazard
analysis takes place.
The arc flash hazard analysis shall take into consideration the design of the overcurrent protective
device and its opening time, including its condition of maintenance.
This amendment was created by the Washington Administrative Building Officials and has been adopted by multiple cities in Washington State. This is the first time I've come across a jurisdiction in the U.S. that has codified AF hazard labeling with HRC or calculated IE. Interesting that it does not specify how to determine this information. Does anyone know of other jurisdictions with similar rules?
