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Product Solutions

Southwire Underground Cable Systems™ Solutions support the complete power supply chain; providing reliability, scalability, and flexibility.

  • Complete line of cables from 69 kV through 400 kV

  • A North American exclusive supplier of Kabeldon and nkt cables' line of underground transmission accessories for 69 kV to 400 kV
  • Fast service response for system asset issues
  • Customer support services include a wide range of engineering, installation, project management, and testing
  • Over seven-million feet of underground transmission cable installed for customers across North America
  • Zero cable failures of installed underground transmission cable to date

Southwire Underground Transmission Structure

Southwire's Huntersville Plant

Located in Huntersville, North Carolina, this 240,000-square-foot plant features state of the art technology for producing high-voltage underground transmission cables, ranging from 69 kV to 400 kV.


Only Southwire Underground Transmission Cable Systems™ are backed by Southwire people.

  • Engineering

    • Support feasability studies and conceptual engineering •
    • Detailed undeground system design •
    • Pulling calculations •
    • Ampacity studies •

  • Project Management

    • Construction management •
    • Full turnkey projects including civil works •
    • Maintenance •
    • Emergency and repair services •

  • Installation

    • • Highly skilled and factory-certified installation technicians
    • • Cable pulling
    • • Splicing and terminating
    • • Sheath bonding and grounding

  • Testing

    • • Commission testing
    • • AC resonant and PD testing
    • • Fault locating
Southwire Solutions are backed by Southwire people

Underground transmission system from end to end

We offer a full spectrum of underground transmission cable installation services, tools, and equipment to meet your specific needs. We're with you every step of the way with responsive service, unmatched engineering support, and onsite project management—a commitment that has resulted in zero cable failures with over seven-million feet of HV cable installed.

End to End Transmission Solutions


Southwire solutions support the compete power supply chain.


From engineering designs to installation and testing. We are here to help.