An implantable electrical lead, comprising: a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen (395, 400) extending from the proximal end through the distal region; a connector assembly configured to mechanically and electrically connects the implantable electrical lead to an implantable pulse generator; an electrode (312, 255, 257) coupled to the flexible body in the distal region; and a multi-layer coil conductor (415, 420) extending within the longitudinal body lumen (395, 400) from the connector assembly to the electrode (312, 255, 257), the multi-layer coil (415, 420) conductor including: a first coil layer including one or more filars wound so as to have a close pitch; and a second coil layer radially surrounding the first coil layer including one or more filars wound so as to have a close pitch, the filars of the second coil layer wound in the same pitch direction as the filars of the first coil layer; and wherein the first and second coil layers (430, 425) are electrically coupled to one another and configured to provide parallel conductive paths between the connector assembly and the electrode (312, 255, 257) such that the multi-layer coil conductor (415, 420) has a maximum DC resistance of about 3 to 3.5 ohms. a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen (395, 400) extending from the proximal end through the distal region; a connector assembly configured to mechanically and electrically connects the implantable electrical lead to an implantable pulse generator; an electrode (312, 255, 257) coupled to the flexible body in the distal region; and a multi-layer coil conductor (415, 420) extending within the longitudinal body lumen (395, 400) from the connector assembly to the electrode (312, 255, 257), the multi-layer coil (415, 420) conductor including: a first coil layer including one or more filars wound so as to have a close pitch; and a second coil layer radially surrounding the first coil layer including one or more filars wound so as to have a close pitch, the filars of the second coil layer wound in the same pitch direction as the filars of the first coil layer; and wherein the first and second coil layers (430, 425) are electrically coupled to one another and configured to provide parallel conductive paths between the connector assembly and the electrode (312, 255, 257) such that the multi-layer coil conductor (415, 420) has a maximum DC resistance of about 3 to 3.5 ohms. a first coil layer including one or more filars wound so as to have a close pitch; and a second coil layer radially surrounding the first coil layer including one or more filars wound so as to have a close pitch, the filars of the second coil layer wound in the same pitch direction as the filars of the first coil layer; and wherein the first and second coil layers (430, 425) are electrically coupled to one another and configured to provide parallel conductive paths between the connector assembly and the electrode (312, 255, 257) such that the multi-layer coil conductor (415, 420) has a maximum DC resistance of about 3 to 3.5 ohms.