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A comment on Rolling blackouts in California have power experts stumped. Parent comment

Re:Rolling blackouts in California have power experts stumped by hanniabu on Monday August 17, 2020 @04:27PM (#24191642)
Theoretically I would thing the sag itself should increase resistance since resistance increases with both length and smaller wire diameter. When the line lengthens the diameter should decrease (similar to stretching a piece of gum or putty).
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Re:Rolling blackouts in California have power experts stumped by function_seven on Monday August 17, 2020 @06:16PM (#24192884)
It's not being stretched by an external force, though. It's expanding due to heat. The diameter would also expand some negligible amount I think.
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Re:Rolling blackouts in California have power experts stumped by leni536 on Monday August 17, 2020 @04:53PM (#24191933)
I don't think it should. Heat expansion should slightly increase the diameter.
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Re:Rolling blackouts in California have power experts stumped by mensetmanusman on Monday August 17, 2020 @07:19PM (#24193451)
Not if the length increases to counteract it.
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Re:Rolling blackouts in California have power experts stumped by sharpneli on Tuesday August 18, 2020 @02:04AM (#24195739)
It doesn’t ”counteract” it. All dimensions increase based on the same coefficient. Same percentage increase on all axis.

See https://en.m.wikipedia.org/wiki/Thermal_expansion and check the coefficient of expansion.

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