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Mott MacDonald has extensive engineering and project management expertise in complete cable projects and cable installations up to 400kV.

Our cable engineering services include route selection, preparation of technical specifications, tendering, checking of contractor’s designs and inspection at manufacturer’s works.

Generally there are two types of cables:

  • Underground cables
  • Submarine cables

Some further details are provided below:

Underground cable projects

Mott MacDonald’s experience in this area extends to all types of cable available, recommending the most appropriate for each scheme and the use of cable tunnels in urban areas. We possess internationally renowned tunnel expertise based on global experience, so is able to undertake the design of all civil works.

Our cable engineering services include route selection, preparation of technical specifications, tendering, checking of contractor’s designs and inspection at manufacturer’s works. We also supervise installation at site and commissioning.

We’ve worked on many complex cabling projects and have strong expertise in optioneering the best cabling solutions to and between substations in congested areas.

Submarine cable projects

Utilising the results of sub-sea surveys, Mott MacDonald provides feasibility studies, route selection and preparation of technical specifications.

Taking into account location, currents and local fishing or other commercial shipping activity, we can decide whether the cable should be buried in a trench, cut into the seabed or laid on the seabed and covered with protective material. Our services also include inspection of the cable during manufacture and supervision of installation at site.


In this sector we cover:

  • Underground cables
    • Technical design
    • Civil design
    • Tunnel design
    • Grid connections
  • Submarine cables
    • Technical design
    • Sub-sea survey data gathering and analysis
    • Cable protection options
    • Anode and cathode technologies
    • Grid connections


We provide the following services:

  • Feasibility studies
  • Environmental studies
  • Technical and civil design
  • Owner’s Engineer
  • Lender’s Engineer
  • Project management
  • Tunnel engineering

Customer benefits

Mott MacDonald can provide a one-stop service including power engineering, tunnel engineering, environmental permitting, grid connections and financial modelling

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