 The theorem states that the power provided to a system of N conductors is equal to the algebraic sum of the power measured by N watt-meters.The N watt-meters are separately connected such that each one measures the current level in one of the N conductors and the potential level between that conductor and a common point.In a further simplification, if that common point is located on one of the conductors, that conductor's meter can be removed and only N-1 meters are required.