At Jicable 2011 a measuring system of conductor AC and DC resistance using synchronous sampling was presented. In the method the current circuit is made coaxial to minimize the influence of external magnetic fields and to minimize error due to mutual coupling to the voltage circuit. However, it has been questioned if the current in the screen induces additional power loss in the conductor due to eddy currents which will influence the measured AC resistance. In this paper we use a first order approximation of an iterative method to show that the additional power loss is negligible.