Uses and Applications of Medium Voltage Power Cables

Medium Voltage Power Cables listed by Underwriters Laboratories as Type MV-105, are specifically designed cables for aerial, direct burial, cable trays, conduit, and underground duct installations. These are suitable for indoor as well as outdoor installations.

Special features of Medium Voltage Power Cables

The cable standard for Medium Voltage wires are single conductor of 2,400V, 5,000V, 8,000V, 15,000V, 24,000, and 35,000V wires. An option for three conductor wires for cables of the 2,400V, 5,000V, and 8,000V with an overall PVC Jacket are also available. As per National Electric Code, these cables are permitted to use between the range of about 90°C - 105°C for continuous operation, 130°C - 140°C for emergency overload conditions, and 250°C for short circuit conditions, depending on the specifications.

A semi-conducting conductor shield, with soft bare annealed copper per ASTM B-3, Class B stranding per ASTM B-8 (compressed) or ASTM B-496 (compact) is generally used. Medium Voltage power cable is mostly shielded. Cross-linked polyethylene (XLP) or Ethylene propylene rubber (EPR) are the most commonly used types of insulation for these cables.

For instance, MV105 EPR Insulation CPE Jacket Shielded or Unshielded 100% or 133% Power Cables have the following specifications: 5kV/8kV UL Type MV-105, 105°C Single Conductor, Shielded, EPR Insulation, PVC Jacket, 5kV 133%, 8kV 100% Insulation Level, Copper Conductor.

Specific Applications of Medium Voltage Power Cables

Medium Voltage Power Cables are appropriate for use in all situations of corrosive environments in power circuits in a range of 2,400Vto 35,000V in all installations of open air, conduit& duct, cable tray when CT rated, in wet and dry locations. These cables can be installed for a broad range of commercial, industrial and utility projects such as chemical plants, refineries, steel mills, industrial plants, commercial buildings, utility substations and generating stations.