EPSC Series constant wattage heating cable generates heat by the core wire — a metal conductor with a certain resistance. Since the entire cable is in continuous flow, the same current passing through leads to uniform heating. Unlike parallel heating cables, the increasing length of series constant wattage cable will not cause a certain voltage drop, or the decrease of heating power at the tail. Besides, series structure of the cable enables its length several times that of the parallel one, making it more suitable for long pipeline occasions. However, it cannot be cut at will.