Telecommunications power cable, as described in Telcordia GR-347 & GR-347,[1] consist of a stranded copper conductor used in AC/DC circuits up to 600 V that are insulated with non-halogen, limited smoke, polyolefin materials that are heat-resistant, moisture-resistant, and flame-retardant.
[1] Telecommunications power cable is intended for use in AC/DC distribution circuits, wireways, racks, and conduits installed in telecommunications Central Offices (COs), transmission stations, cell-tower sites, and other remote sites.
These environments are normally dry, but cables may be placed in partially covered or protected porches, crawl spaces, or in underground vaults where water and high moisture levels can occur.
Telecommunications power cables use RHH or RHW type insulation materials as defined in NFPA 70 of the National Electrical Code,[6] for use in dry, damp, and wet locations.
To maintain a continuing level of quality on the production of cable, suppliers typically administer a Quality Management System (QMS) consistent with the latest issue of standards documents ISO 9000[7] and TL 9000[8] or an equivalent alternate quality system satisfactory to the purchaser.