Prysmian Group has won a contract to supply array cables to Orsted's 1.4GW Hornsea 2 offshore wind farm off the east coast of England.
The multi-million pound deal will see Prysmian deliver over 300km of cabling for the project.
A further 900km of cable cores will be supplied, manufactured at the company's plant in Wrexham in the UK.
The plant will be upgraded to carry out the work and will be the first UK facility to manufacture submarine array cable cores, Prysmian said.
Prysmian Group offshore wind sales team manager Alessandro Panico said: “We are proud to support Orsted in providing the UK market with the highest quality, locally manufactured cables for the next generation of UK offshore wind farms.
“Alongside this we have launched an important investment plan to increase our submarine cables production capacity in order to meet the growing demand from the sector.
“This key investment in our Wrexham facility is a sign of the growth of the UK offshore wind supply chain, and our strategic ambitions in the renewables industry.
“This order represents around two years of production for this facility, and will benefit other companies that want to deliver competitive local content in their UK projects.”
Orsted programme director for Hornsea 1 and 2 Duncan Clark said: “We are delighted to be working with Prysmian Group who have years of experience and a strong track record of innovating, including the development of high voltage submarine cable solutions.
“In order to maintain the UK’s leading position in offshore wind, further development of a robust, competitive supply chain is needed to not only provide for UK projects, but also to take advantage of exporting abroad as the industry continues to grow globally.
“Working with Prysmian to secure locally manufactured cable cores is just one of the ways we are engaging with suppliers to ensure our wind projects have the highest viable proportion of UK content.”