All the documentations I could find goes upto only 1000 kcmil. Please direct to a reference for larger cables.
Is there a method to extrapolate from smaller cable sizes?
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Is this the table you're looking for? Burndy, see page O-30 . If I read it correctly, you should be able to plot strength vs cmil for the values in that table and generate a smooth curve which should predict the strength at 2E6 cmil.
I took the Burndy data, ran a
lowess smoother followed by a linear regression and got the coefficients
tensile = 5.72476410e-02*(cmils) + 4.75077150e+03 , which produces a value for
2E6 cmil of
1.1925e+05 (that's breaking strength in pounds)
Use with caution :-), as that's a serious amount of extrapolation.
I found a value at PriorityWire (PDF) which says 34 200 pounds for Aluminum cable. I suspect that it's rare anyone would go to the incredible expense of using Cu for a strength member, which is why nobody measures the value. Certainly Cu can support its own weight for any run length you can imagine.
That is a big cable. I am making an estimation here, but let's follow along with my cable analysis:
1000 Kcmilcopper cable has 4 layers over the king strand with
2000 Kcmilcopper cable with 5 layers of the king strand has $n=$
91strands => each strand $d=$
-Ospec) is $\rm sf=$
62100 psifor fully hard copper.
0.162 inhaving rated strength
2000 Kcmilcopper cable is