> Charles Craft wrote:
>> Voltage 450 kV DC
>> Power 1,000 MW

Olin said:

> That's 2.2KAmps.

>> 1430 mm2 Cu

> That's the same area as a 1.7 inch (43mm) diameter circle.

About half the current density allowed here

                    http://www.powerstream.com/Wire_Size.htm

they prorate about linearly BUT for butied cables the figures will be
lower due to temperature rise.

That mass per meter is about 3.5 x the mass of copper involved.
Seems like there is a lot of other material there as well. Maybe armour ? :-).



              Russell
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