For the Nea Makri–Polypotamos 150 kV AC submarine and underground cable interconnection linking South Evia to the Attica region (Attica–Evia 1), the contract signed in May 2010 specified that the project was scheduled to be completed within 36 months, implying full operational readiness around 2013 to enable the export of about 400 MW of wind power from South Evia into the mainland transmission grid and to reinforce the electrification of eastern Attica.
On 14 May 2010, Greece’s Public Power Corporation (PPC) signed a €64 million turnkey contract with Nexans Norway AS to design, manufacture and install the 150 kV high‑voltage AC submarine and underground cable system between the Nea Makri substation in Attica and the Polypotamos substation on Evia, enabling transmission of around 400 MW of wind power from South Evia to Attica and reinforcing the electrification of eastern Attica.