Abstract: A wind turbine blade comprising a blade body, at least three electrically conductive elements comprising conductive material, said conductive elements optionally comprising at least one lightning conductor, at least one spar cap, and at least one heating arrangement, and a potential control arrangement, wherein the at least three conductive elements have longitudinal axes that are essentially codirectional with a longitudinal axis of the blade body. The potential control arrangement comprises a plurality of coupling devices, each of which coupling at least two of said conductive elements, each coupling device and being positioned at predetermined locations with respect to a blade axis being a longitudinal axis of the blade body.