A modular plug includes a plug housing having a mating end and a cable end and plug contacts at the mating end. The plug housing and the plug contacts are shaped and positioned to define an RJ-45 modular plug mating interface. The plug contacts are arranged into a first group and a second group with each of the plug contacts in the first group being electrically commoned to form a first power circuit and each of the plug contacts in the second group being electrically commoned to form a second power circuit. The first and second power circuits are terminated to different wires of a cable.