A cable includes a flexible jacket extending along a length and first and second lateral axes perpendicular to the length. The jacket also defines flat major surfaces that are parallel to each other and spaced apart on opposite sides of the first lateral axis. First and second inner wire assemblies extend within the jacket. The jacket maintains the first and second inner wire assembles in predetermined positions along the first lateral axis within 0.05 mm of each other and disposed on opposing sides of the second lateral axis. First and second outer wire assemblies also extend within the jacket. The outer wire assemblies include a wire of conductive filaments and an insulating layer of an enamel material surrounding the wire. The jacket maintains the first and second outer wire assemblies in positions along the first lateral axis and spaced apart from the first and second inner wire assemblies.