On 26 July 2013 09:43, Sean Breheny <shb7@cornell.edu> wrote:
> I would second Russell's suggestion. I once tried to make shunts out of
> copper and found that they accuracy was very poor due to the high tempco =
of
> the resistance of copper. Just the self-heating from a moderate current
> would warm the wire enough to cause an error on the order of 10%

With Nichrome you can get resistance increases  of ~=3D +6% with NiCRA
and 10% with NiCrC relative to the resistance at 68 F / 20C, BUT
that's at ~=3D 2000 F / 1100 C.




           Russell
--=20
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