The external equipment-grounding-conductors (i. the main grounding conductor from customer's power distribution panel as well as the other conductors of the grounding system outside of cabinets and boxes) are attached to these PE-bus bars. In the United States of America, instead of the more correct term “protective conductor” they mostly use the terms “equipment grounding conductor” and “grounding. Proper wire and cable labeling is an essential yet often overlooked aspect of maintaining a neat, efficient, and safe infrastructure in the industry. From telecommunications, construction, and manufacturing to data centers, the proper labeling process saves time, eradicates errors, and ensures. This publication explains markings found on UL Certified, Listed, Classified, or Verified wire and cable. Designed for the most rigorous indoor or outdoor use, our portfolio of wire labeling and identification features flexible options including adhesive-backed wiring and cable labels. The IEC 60446 standard, “Basic and Safety Principles for Man-Machine Interface, Marking, and Identification,” establishes global guidelines for identifying electrical equipment terminals, conductors, and wiring colors. In electrics, it is customary to distinguish wires by color.