What is required on handhole enclosures to distinguish their purpose?

Handhole enclosures must have a visible mark or logo that clearly indicates their purpose. This requirement helps ensure that anyone interacting with the enclosure can quickly identify its function and contents, promoting safety and efficient operation. Such visible markings facilitate easier maintenance, inspections, and emergency responses by providing clear information at a glance.

Identification numbers, color codes, or functional labeling could support identification but do not necessarily offer the same level of immediate recognition that a visible mark or logo provides. A logo commonly signifies the manufacturer and can convey important usage information, making it a vital aspect of safety and usability for these structures.