This article, produced by the Communications Cable and Connectivity Association (CCCA), is intended to provide the reader with a guide to the key changes in the 2023 National Electrical Code that are of interest to manufacturers, installers, distributors and users of Class 1, 2 . This article, produced by the Communications Cable and Connectivity Association (CCCA), is intended to provide the reader with a guide to the key changes in the 2023 National Electrical Code that are of interest to manufacturers, installers, distributors and users of Class 1, 2 . d suppliers of electrical construction services. They define a minimum baseline of quality and workmanshi for installing electrical products and systems. NEIS® are intended to be referenced in contrac documents for electrical construction ation or liability to users of this publication. The 2020 edition of the NEC introduced a new Article into Chapter 8, Article 800, General Requirements for Communications Systems and renumbered the previous Article 800, Communica ions Circuits as Article 805. Electrical properties are specified for optical ground wire (OPGW) and optical phase conductor (OPPC) cables. Hybrid communication cables are specified in the IEC 62807. Optical fiber cables are essential components of communication networks, transmitting data signals in the form of light pulses over glass or plastic fibers.