With the economic pressure arising from the restructuring of the electric power industry around the world, the transmission circuits become more heavily loaded and hence more prone to thermal overloads. Better understanding of the heat transfer phenomena around loaded electric power cables will not only help to establish correct transmission line limits, but also may help the circuit owner in the implementation of the corrective measures to increase cable ratings. This book looks at the advanced topics of electric power cables: in particular, mathematical formulations illustrated by numerous practical examples.