A sheath adapted for use with a catheter comprising an electrical lead having a proximal end and a distal end and a lumen extending from the proximal end to the distal end and the electrical lead including a tubular member of non-conductive material. At least a first set of electrical conductors and a second set of electrical conductors extending from the proximal end to the distal end laid on the non-conductive tubular member, and an outer layer of non- conductive material applied over the electrical conductors to cover the conductors. One or more electrodes are disposed on a distal portion of the sheath. Each electrode is in electrical communication with at least one of the plurality of electrical conductors through the outer layer. The first set of electrical conductors is helically wrapped around the lumen and the second set of electrical conductors is helically wrapped around the first set of electrical conductors.
