What type of information is generally NOT marked on electrical equipment labels?

The information that is generally not marked on electrical equipment labels is the limited approach boundary. Labels on electrical equipment typically include operational limits, such as voltage ratings and arc flash boundaries, because these are crucial for ensuring safe operation and maintenance.

The limit of operation provides essential data about the maximum operating condition of the equipment, ensuring that users do not exceed safe operational parameters. Voltage ratings are crucial for understanding what electrical loads the equipment can handle, which is a direct safety concern. The arc flash boundary is also marked to inform personnel of the distance they must maintain from equipment to prevent injury from potential arc flash incidents.

In contrast, the limited approach boundary is a more specific safety consideration that relates to the distance an unqualified person can safely approach a piece of live electrical equipment. While important in safety protocols, this boundary is not typically detailed on the equipment's label itself, as it falls under broader safety guidelines rather than equipment specifications. This distinction highlights the importance of training and safety practices beyond the basic labeling of equipment.