A 420-kilometer cable order will support Greece’s planned Corinth–Kos power connection, after Nexans signed a subcontract for equipment intended to link the Dodecanese islands with the mainland grid.
Nexans announced the agreement Nov. 6. Its part of the work covers 420 kilometers of mass-impregnated (MI) cable rated at 110 kilovolts. The planned high-voltage direct current (HVDC) interconnector is designed for 1 gigawatt at 320 kilovolts.
Hellenic Cables said Aug. 13 it had been awarded the turnkey engineering, procurement, construction and installation contract through its wholly owned subsidiary Fulgor S.A. Hellenic Cables valued the contract at approximately €1.5 billion and said its signing was subject to customary statutory conditions and approvals. Nexans said Hellenic Cables is working on the project in a consortium with Asso.subsea.
The Independent Power Transmission Operator (IPTO) listed an estimated €1.35 billion budget for the cable section in a December 2025 tender. That was an earlier estimate for the cable section, while Hellenic Cables later cited a value for the turnkey contract. Nexans did not disclose its subcontract’s value.
The full project is described as about 1,260 kilometers of subsea cable plus 30 kilometers underground. Hellenic Cables said the project’s HVDC cables will be made at facilities in Corinth and Thiva, Greece.
Nexans said project work had started on its MI cable production lines and a seabed survey was under way. It expects those lines to be used for project activity from late 2026 through 2027 and into mid-2028.
IPTO says the connection would bring the Dodecanese into Greece’s mainland transmission network and improve the security and reliability of electricity supply there. The operator says the link could allow island oil-fired power stations to be phased out over time and reduce universal service charges shared among consumers. Its broader plan includes later mainland connections to Rhodes and Karpathos.
Hellenic Cables expects the overall project to begin in the fourth quarter of 2026 and finish in 2030.
