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A three phase power flow program based on symmetrical components comprises three independent subproblems corresponding to positive, negative, and zero-sequence networks. The positive sequence network is solved using sequence decoupled full Newton-Rahpson method without any modifications in their formulation. The negative- and zero-sequence networks are solved using nodal voltage equations. These three sequence networks have been modelled by three independent equivalent circuits and solved simultaneously using multi-core processors parallel programming. The parallel three-phase power-flow program has been tested using IEEE 13, 34 and 123 node feeder and a practical 37 node distribution feeder. The result showed that parallel three phase load flow produced execution speedup for every test system.