It's a higher number than the carried power, because AC electricity has those stages when the voltage is smaller than the nominal value. (Unless it's a DC line, then they are the same.)
Edit: Found this, which isn't specific but refers to it as a three-phase transmission cable which implies it is indeed AC http://www.jicable.org/2007/Actes/Session_A3/JIC07_A34.pdf
AC doesn't directly induce resistance, no. But there's a shared budget of current and magnetic field, and if you blow the budget the wire becomes a normal conductor.