JoeOh Posted January 1, 2010 Posted January 1, 2010 I hear that main power lines only have limited power going through them to avoid the lines sagging too much. Is the sagging of the power lines just due to the heat and/or something else?
insane_alien Posted January 1, 2010 Posted January 1, 2010 just heat. the thermal expansion can be quite large due to the length of the lines.
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