Reactance and skin effect of concentric tubular conductors

THE concentric arrangement of tubular conductors to carry heavy alternating currents gives compactness, low reactance drop, and reduced loss from skin effect or crowding of the current to the surface of the conductors. This arrangement is being used to a considerable extent.¹² In this paper formulas and curves are given to enable the reactance and the skin-effect resistance ratio of such conductors to be determined for three-phase and single-phase circuits.