East West Interconnector

Transmission grids are often interconnected so that energy can flow from one country to another. This helps provide a safe, secure, reliable and affordable energy supply for everybody. EirGrid Interconnector DAC owns the East West Interconnector linking the electricity grids in Ireland and Great Britain. We sell capacity on the East West Interconnector through auctions.

The East West Interconnector is a 500 MW High Voltage Direct Current (HVDC) link between the electricity transmission grids of Ireland and Great Britain. At 500 MW it is one of the largest voltage source conversion (VSC) HVDC links in operation worldwide.

We sell capacity on the East West Interconnector through auctions, which you can learn more about below.

Celtic Interconnector

EirGrid is exploring an interconnector between Ireland and France, known as the Celtic Interconnector.  More information can be found here.


Safety is core to how EirGrid does business. To determine if your proposed works may be close to the route of the interconnector, please consult our safety notice and refer to the following links:


UK Line Search Before-U-Dig

If you need any additional information, call (01) 2370924 (Ireland) or 01244 288 353 (UK).

The Heath and Safety Authority have published a Code of Practice (CoP) on avoiding danger from underground services. The CoP provides practical guidelines to ensure compliance with legal requirements. It is available online here.

In the event of an emergency relating to the East West Interconnector cables, EirGrid will be contacted immediately. The emergency contact number is 01 2370924.

A detailed Irish Route Map is available here.

A detailed Wales Route Map is available here.

Key Information

For all the information you need on trading as a market participant, auctions and results, outages, open consultations, and relevant documentation, click here.


Open Consultation

The purpose of this consultation is to invite the views of interested parties on the proposed long-term transmission rights products for the IU region that will be offered on the bidding zone border between Great Britain (GB) and SEM (SEM↔GB). This consultation is in accordance with Article 31 of Commission Regulation (EU) 2016/1719 establishing a Guideline on Forward Capacity Allocation (the "FCA Regulation").

Click here for consultation details.

Responses should be received by 5 pm on 8 March 2017.

Closed Consultation

EirGrid Interconnector DAC seek to consult on the Access Rules and Charging Methodology of the East West Interconnector (EWIC)

The interconnector owners are also using this consultation to advise interested parties of their intention to adopt a new version of the Harmonised Allocation Rules (“HAR”) for allocations of Financial Transmission Rights in the new I-SEM and to seek views on their proposed border specific annex to the HAR.

Please click here for the consultation paper.

Responses should be received by 5 p.m. on Wednesday 7 September 2016

Contact Information

Interconnector Administrator

Tel: +44 (0)28 90707450


EirGrid Main Reception

Tel: +353 (0)1 677 1700


Emergency Number

Tel: +353 (0)1 237 0924