These requirements are echoed in NFPA 70-2017: National Electrical Code (NEC), Article 110. Both of these sections address the first reason to provide descriptive equipment labels: for personnel safety. This standard describes requirements for numbering and labeling of real property electrical distribution equipment, circuits, and site lighting at Lawrence Livermore National Laboratory. This is an internal LLNL standard meant to guide the design of new facilities, facility modifications, and. Purpose – This Article is about all electrical equipment numbering system, Electrical Panel Numbering System, Electrical Wire Numbering System, Electrical Relay Numbering System, Electrical Drawing Numbering System, Electrical Schematic Numbering System, Electrical Cable Numbering Systems. POSITION/MEETING NO. PLANT & EQUIPMENT IDENTIFIERS 6. Depending on country and industry, people are either familiar with the IEC system or not. Often when IEC. 26 05 53 (16075) - Identification for Electrical Systems Section Cover PageSection 26 05 53 Identification 2022-07-04for Electrical Systems Use this Section to specify all requirements related to identification of electrical equipment, systems, wiring, conduit and cable, pull and junction box. An obvious location to look for requirements is NFPA 70E-2015: Standard for Electrical Safety in the Workplace, Article 130.