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Dialogue with the communities

Terna incontraThe new “Sorrento-Capri” connection is the focal point of the Terna incontra event taking place on 11 October in Sorrento with the local communities. It is an important opportunity to share the reasons for the works, which will guarantee the continuity of the transmission grid and improve the efficiency of the electricity service. Terna will explain the project and will listen to the comments and doubts of the citizens, responding to questions from the local communities.

Why it is important

Upon completion of the first connection between Torre Annunziata and Capri, Terna will open the construction sites for the second undersea cable which will connect Capri with Sorrento. The works will involve some temporary inconveniences for the local communities (here for the works map), but they will bring numerous benefits.

The Sorrento peninsula is currently served by an obsolete electricity grid from the 1960s which is no longer able to guarantee coverage of the electricity demand. The completion of the new 150 kV “Sorrento-Capri” connection will have a positive impact for all consumers in the peninsula, improving the reliability of the electricity grid and electricity supply. In collaboration with the Municipality of Sorrento, the works will complete the existing partially-constructed link with the power line connecting the island of Capri with Torre Annunziata. The works will therefore supply both Capri and the Sorrento peninsula with the dual power supply required to guarantee greater operational quality, security and continuity.

Did you know ...
The works in the Sorrento area will allow for the demolition of two power lines: the 1.5 km “Castellammare - Sorrento deriv. Vico Equense” 60 kV power line with 4 pylons and the 1.6 km “Castellammare - Sorrento deriv. Fincantieri” 60 kV overhead power line with 6 pylons.
The project

The new connection sees the construction of a new electrical substation and a new 19 km (approximately) 150 kV power line which will connect the new substation with the one in Capri (through approximately 3 km of underground cable and 16 km of undersea cable).The works will end by December 2019.

The substation will be constructed using cutting-edge technology solutions to minimise the impact on the surrounding area.

Thanks to the GIS technology used, the electromechanical equipment will be installed inside a dedicated building, in extremely confined spaces in comparison with the traditional technology. The project does not only envisage optimisation of spaces, but also the use of finishing touches, tones and structures that best fit with the surrounding environment. The substation is also innovative in terms of safety. All the equipment will be protected indoors, in soundproof spaces, and installed according to the best possible safety standards. A night time lighting system which adapts to the security management needs of the electrical substation, without impacting on the surrounding natural area, will be provided. The time schedule for the entire project is october 2018-december 2019.

The road construction sites: the first part of the 150 kV power line that runs from the new substation in Sorrento to the substation in Capri, will be placed in underground cables spanning approximately 3 km.

The marine construction sites: a 16 km long power line will be placed undersea. The expected starting date is February 2019. The works will go on for 3 weeks..

Protecting biodiversity
To minimise interference with marine habitats, the landings will be created using directional drilling. This technique allows creation of a 200-metre-long micro tunnel for the cable, several metres under the seabed (on average 6). This will allow laying of the connection with zero disturbance or damage to ecosystems involved. Specifically, this project solution allows work to pass beneath colonies of Posidonia Oceanica in front of the coastline, leaving the habitat completely undisturbed and guaranteeing protection of the electrical connection. Undersea cable laying works will begin in the first half of February 2019 supposedly and will have an estimated minimum duration of 3 weeks.
Environmental and marine monitoring
Environmental monitoring of the areas involved will be carried out before, during and after works. Surveying and sampling will be carried across more than 200 hectares. Data collected will be made available to the Ministry of the Environment and to marine and environmental research. Existing and future collaboration will be activated with key stakeholders in the marine field.
The stages

Opening the construction sites represents the conclusive moment of the very long approval process, the outcome of careful and continual dialogue with local institutions and communities.

  • In November 2007, the official request from the Campania Region to provide adequate reinforcements to power the islands and the Gulf of Naples was sent.
  • In September 2008, a meeting was held, at the Ministry of Economic Development with representatives from Terna, the Campania Region and the local authorities involved, on the feasibility of the planned works in the Gulf of Naples and the Sorrento peninsula. In December 2009, the planned works in the Gulf of Naples and the Sorrento peninsula were included in Terna’s Development Plan. 
  • From October 2010 to January 2011, Terna and the local authorities involved in the works carried out joint inspections during which indications emerged that led to the agreement on the localisation of the planned works. 
  • In September 2011, Terna signed a Memorandum of Understanding with the Municipality of Sorrento for a series of works, including for the location of the new Capri-Sorrento connection.
  • After a series of audits and studies on the area, the works will get under way at the end of 2018 (deadline: December 2019).
See the map with the construction site opening presumed dates
Mappa Sorrento


  • Foreseen works from 14/01/2019 to 16/02/2019
  • Foreseen works from 15/10/2018 to 11/01/2019
  • Foreseen works from 15/10/2018 to 26/11/2018
  • Foreseen works from 19/01/2019 to 12/03/2019