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newshound newshound is offline
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Default Overhead power cables.

On 04/01/2018 15:36, Andy Burns wrote:
The Natural Philosopher wrote:

cost of repairing overhead 11KV fault. £2000.
Cost of undergrounding it - £30,000 per kilometer.

£250m for 8 miles in Stratford

Not 11 kV though: 132 and 400 kV.

A bit more detail here

Tunnels were 4.15 and 2.8 metres diameter.

I guess trenched undersea cables are much more lossy. It would be
interesting to know at what point it becomes worth going to DC.