The label says…

Labeling of equipment is an effective method of alerting personnel of the shock and arc-flash hazards as well as providing details of necessary protective clothing and procedures. Since arc-flash labeling is intended to protect the worker, it is particularly helpful to consider the various ways in which labeling can go wrong. It is in the best interests of all to avoid any situation which could lead to either a false sense of security or to excessive personal protective equipment (PPE). This is a real life collection of examples from facilities having arc-flash labeling programs in which corrections were needed to the labels, personnel training, or maintenance.