Arc Flash Boundary Label: What Needs to Appear?

The National Electric Code (NEC) requires that relevant electrical equipment be 'field marked' to warn qualified personnel of potential electric arc flash hazards. This is outlined in Article 110.16, which emphasizes the importance of easily noticeable labeling before workers are exposed to potentially dangerous live parts.

A crucial aspect of this labeling requirement is its visibility. The label must be placed in a location that is clearly visible to qualified individuals before they begin work on the electrical equipment. This means that it should not be hidden or obscured by panels, doors, or other obstructions.

In some cases, companies may choose to place the label inside the door of an enclosure or panel. However, this should only be done if the door must be opened to remove the panel face or enclosure. Typically, the label is placed outside the door for maximum visibility.

The NEC's requirement for labeling electrical equipment with arc flash boundaries serves as a critical safety measure. By providing clear warnings and markings, workers can identify potential hazards and take necessary precautions to avoid injury or harm.

In summary, when it comes to arc flash boundary labels, the key point is that they should be easily noticeable by workers before they begin work on potentially hazardous electrical equipment. The label must be placed in a location that is clearly visible and not hidden from view. By following these guidelines, companies can help ensure a safer working environment for their employees.

Arc flash boundary label