OPPC is a new type of special electrical cable that makes up the unit of fiber in the phase with the function of phase and communication. It is mainly applied in low voltage classes 110kV, urban power distribution network and rural power network. For the low and medium voltage power network, especially in the power distribution line that is less than 35 kV, some of them can not be installed with OPGW because it is possible to use ground cable. In all electrical networks, only the phase is essential. To meet the requirements of electrical monitoring or fiber optic networks. In the traditional structure of the phase, add in the fiber unit with the appropriate method, which can become fiber optic phase conductor.