"Andrew Gabriel" wrote in message
.. .

Yes, I got it wrong.
It should be 0.009 ohms -- Table 4D2B claims 18 mOhms/metre.
I'm not sure where your 7 mOhm comes from, although it's a
lot nearer than my 90 mOhms ;-)

I suspect the 9 vs 7 is temperature related.
Table 9A in the OSG gives 14.82/2 = 7.41
Using 16.8nOhm-metres (the first figure I stumbled across on the internet -
I don't know what temperature it's for) gives something around 7-ish, too.

There's another mistake too -- I calculated the temperature
rise for the mass of copper in 5m of cable rather than 0.5m.

A physicist, you said? Hmm.

Cheers,

Will