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A cable includes a plurality of bundles of insulated electrical conductors, each bundle having a first conductor, a second conductor, and a third conductor in a layered configuration. The first conductor of each bundle is connected in parallel to the first conductor of the remaining bundles, the sec

A cable includes a plurality of bundles of insulated electrical conductors, each bundle having a first conductor, a second conductor, and a third conductor in a layered configuration. The first conductor of each bundle is connected in parallel to the first conductor of the remaining bundles, the second conductor of each bundle is connected in parallel to the second conductor of the remaining bundles, and the third conductor of each bundle is connected in parallel to the third electrical conductor of the remaining bundles. In addition, within each bundle, the first, second and third electrical conductors are configured so that a magnetic field generated in response to currents flowing within the bundle is zero as seen at a plane oriented transverse to an electrical conduction direction of the cable and located between the ends of the cable.

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1. An apparatus comprising a cable that includes a first end, a second end, and a plurality of bundles of electrical conductors, each bundle having a first insulated electrical conductor,a second insulated electrical conductor,a third insulated electrical conductor, anda bundle wrap that encloses at

1. An apparatus comprising a cable that includes a first end, a second end, and a plurality of bundles of electrical conductors, each bundle having a first insulated electrical conductor,a second insulated electrical conductor,a third insulated electrical conductor, anda bundle wrap that encloses at least a portion of each of the first, second and third electrical conductors and maintains the first electrical conductor, the second electrical conductor and third electrical conductor in respective positions relative to each other within a layered configuration,the first electrical conductor of each bundle being electrically connected in parallel to the first electrical conductor of the remaining bundles,the second electrical conductor of each bundle being electrically connected in parallel to the second electrical conductor of the remaining bundles, andthe third electrical conductor of each bundle being electrically connected in parallel to the third electrical conductor of the remaining bundles, wherein within each bundle, the first electrical conductor, the second electrical conductor and the third electrical conductor are configured so that a net magnetic field generated in response to currents flowing within the bundle is zero within a plane oriented transverse to an electrical conduction direction of the cable and located between the first and second ends of the cable. 2. The apparatus of claim 1, wherein within each bundle, the first electrical conductor, the second electrical conductor and the third electrical conductor are configured so that the sum of the currents crossing the plane is zero. 3. The apparatus of claim 1, wherein within each bundle, the phase difference between the current of the first electrical conductor and the currents of the second electrical conductor and the third electrical conductor is selected such that the sum of the current amplitudes crossing the plane at any given time is zero. 4. The apparatus of claim 1, wherein within each bundle, the first electrical conductor, the second electrical conductor and the third electrical conductor are configured so that the current of each of the first, second, and third conductor has a different current direction than the current direction of the adjacent individual conductor. 5. The apparatus of claim 1, wherein the bundles are arranged within the cable such that when the cable is viewed in cross section, there is rotational symmetry of the bundles about a longitudinal axis of the cable. 6. The apparatus of claim 1, wherein the cable is formed having a twist such that the bundles extend helically about a longitudinal axis of the cable from the first end to the second end. 7. The apparatus of claim 1, wherein the bundle wrap comprises an insulating material. 8. The apparatus of claim 1, wherein each bundle is both fixed in position within the cable relative to the other bundles within cable as viewed in cross section, andconfigured to axially translate within cable relative to the other bundles. 9. The apparatus of claim 1, wherein each of the first electrical conductor, the second electrical conductor and the third electrical conductor comprise a laminated superconductor wire assembly. 10. The apparatus of claim 9, wherein the laminated superconductor wire assembly comprises a first support lamina;a second support lamina arranged in a layered configuration relative to the first support lamina;at least one insert disposed between the first support lamina and the second support lamina, the at least one insert including a high temperature superconductor. 11. The apparatus of claim 9, wherein the laminated superconductor wire assembly comprises a first support lamina;a second support lamina arranged in a layered configuration relative to the first support lamina;a first insert disposed between the first support lamina and the second support lamina; anda second insert disposed between the first insert and the second support lamina, whereineach of the first insert and the second insert comprising a high temperature superconductor layer and a metal substrate layer,the first insert is oriented so that the first insert high temperature super conductor layer is disposed between the first support lamina and the first insert metal substrate layer, andthe second insert is oriented so that the second insert high temperature superconductor layer is disposed between the second support lamina and the second insert metal substrate layer. 12. The apparatus of claim 9, wherein the laminated superconductor wire assembly comprises a first support lamina;a second support lamina arranged in a stacked configuration relative to the first support lamina;at least one metal substrate layer disposed between the first support lamina and second support lamina,a first high temperature superconducting layer disposed between the at least one metal substrate layer and the first support lamina; anda second high temperature superconducting layer disposed between the at least one metal substrate layer and the second support lamina. 13. The apparatus of claim 1, wherein the cable is configured to permit a cable bend radius of less than 2 meters and operate with losses of less than 5 W/m/kA when used in 60 Hz AC operation. 14. The apparatus of claim 1, wherein the apparatus further comprises a power supply configured to provide alternating current at voltages of 1000 Volts or less, wherein the first end of the cable is connected to the power supply and is configured to transmit power generated by the power supply from the first end to the second end. 15. The apparatus of claim 1, wherein each bundle has an orientation defined by the ordering of the respective first, second, and third electrical conductors within the bundle along a bundle axis, and as seen in a cross-section transverse to a cable longitudinal axis, the bundles are arranged about the cable longitudinal axis such that each bundle axis extends transverse to a radius of the cable passing through a midpoint of the bundle. 16. The apparatus of claim 1, wherein each bundle within the cable has the same orientation relative to a radial line that passes through a midpoint of the bundle. 17. The apparatus of claim 1, wherein there is an even number of bundles within the cable, and each bundle is evenly spaced apart from the adjacent bundle along a circumferential direction of the cable. 18. The apparatus of claim 1, wherein the cable further comprises a cylindrical tube, and the bundles are supported on an outward-facing surface of the tube. 19. The apparatus of claim 1, wherein the cable further comprises a cable wrap which surrounds a periphery of the cable and encloses at least a portion of each bundle, wherein the configuration of the bundles relative to the tube is maintained by the cable wrap. 20. The apparatus of claim 1, wherein each bundle is assembled with at least one other bundle to form a group, and relative positions of the bundles within the group are maintained by enclosing at least a portion of the bundles within the group with a group wrap, and the cable further comprises at least two groups that are positioned symmetrically about a cable longitudinal axis as seen in a cross-sectional view of the cable. 21. The apparatus of claim 20, wherein each bundle is layered with at least one other bundle to form the group. 22. The apparatus of claim 1, wherein each bundle is assembled with at least one other bundle to form a group, and the bundles are arranged within a group in a layered configuration so that at least one bundle overlies another bundle along a group axis that passes through each respective conductor of each bundle within the group, andthe orientation of each bundle within the group is the same as that of the remaining bundles within the group such that the ordering of the respective first, second, and third electrical conductors within the layered configuration of a bundle is repeated for each bundle in the group as seen along the group axis. 23. The apparatus of claim 1, wherein each bundle is assembled with at least one other bundle to form a group,the cable further comprises at least two groups,as seen in a cross-section transverse to a cable longitudinal axis, the groups are arranged about the longitudinal axis such that at least one group has an orientation that is a translation of the orientation of another group relative to a transverse line passing through the cable longitudinal axis. 24. The apparatus of claim 23, where the orientation of each group is defined by the ordering of the respective bundles within the group along a group axis, and by the ordering of the first, second, and third electrical conductors within the respective bundles of the group. 25. The apparatus of claim 1 wherein each bundle is grouped with at least one other bundle to form a group, and the cable further comprises several groups, each group having an orientation defined by the ordering of the respective bundles within the group along a group axis that passes through a midpoint of each of the respective bundles within the group, the groups arranged about a cable longitudinal axis so that, as seen in a cross-section transverse to the longitudinal axis, a first group is disposed in a first quadrant of the cross section,a second group is disposed in a second quadrant of the cross section,a third group is disposed in a third quadrant of the cross section,a fourth group is disposed in a fourth quadrant of the cross section, where the quadrants are arranged in numerical order in a clockwise direction of the cross section,the first group axis is coaxial with the second group axis, and is parallel to and spaced apart from the third group axis,the third group axis is coaxial with the fourth group axis,the second group has an orientation that is a translation of the orientation of the first group relative to a first axis transverse to a longitudinal axis of the cable,the fourth group has an orientation that is a translation of the orientation of the first group relative to a second axis transverse to a longitudinal axis of the cable, andthe third group has an orientation that is a translation of the orientation of the second group relative to the second axis. 26. The apparatus of claim 1 wherein each bundle is grouped with at least one other bundle to form a group, and the cable further comprises several groups, each group having an orientation defined by the ordering of the respective bundles within the group along a group axis that passes through a midpoint of each of the respective bundles within the group, the groups arranged about a cable longitudinal axis so that, as seen in a cross-section transverse to the longitudinal axis, a first group is disposed in a first quadrant of the cross section,a second group is disposed in a second quadrant of the cross section,a third group is disposed in a third quadrant of the cross section,a fourth group is disposed in a fourth quadrant of the cross section, where the quadrants are arranged in numerical order in a clockwise direction of the cross section,the first group axis is parallel to and spaced apart from a first transverse axis that is transverse to a longitudinal axis of the cable,the second group axis is parallel to and spaced apart from a second transverse axis that is transverse to both the longitudinal axis of the cable and the first transverse axis,the first group axis is transverse to the second group axis,the third group axis is parallel to and spaced apart from both the first transverse axis and the first group axis,the fourth group axis is parallel to and spaced apart from both the second transverse axis and the second group axis, andthe third group axis is transverse to both the second group axis and the fourth group axis. 27. The apparatus of claim 26, wherein the orientation of each group along its respective group axis is the same, whereby a first bundle of each group is located radially outward relative to the third bundle of each group. 28. The apparatus of claim 26, wherein the arrangement of the bundles within the third group mirrors the arrangement of the bundles within the first group as seen across the second transverse axis, and the arrangement of the bundles within the second group mirrors the arrangement of the bundles within the fourth group as seen across the first transverse axis. 29. An apparatus comprising a cable that includes a first end, a second end, and a plurality of bundles of electrical conductors, each bundle having a first insulated electrical conductor,a second insulated electrical conductor,a third insulated electrical conductor, anda bundle wrap that encloses at least a portion of each of the first, second and third electrical conductors and maintains the first electrical conductor, the second electrical conductor and third electrical conductor in respective positions relative to each other within a layered configuration,the first electrical conductor of each bundle being electrically connected in parallel to the first electrical conductor of the remaining bundles,the second electrical conductor of each bundle being electrically connected in parallel to the second electrical conductor of the remaining bundles, andthe third electrical conductor of each bundle being electrically connected in parallel to the third electrical conductor of the remaining bundles, wherein each bundle is grouped with at least one other bundle, and relative positions of the bundles within the group are maintained by enclosing at least a portion of the bundles within the group with a group wrap, andthe cable further comprises at least two groups of bundles, and each group is positioned relative to the remaining groups such that so that a net magnetic field generated in response to currents flowing within the cable is zero as seen at a plane oriented transverse to an electrical conduction direction of the cable and located between the first and second ends of the cable. 30. An apparatus comprising a cable that includes a first end, a second end, and a plurality of bundles of electrical conductors, each bundle having a first insulated electrical conductor,a second insulated electrical conductor, anda bundle wrap that encloses at least a portion of each of the first and second electrical conductors and maintains the first electrical conductor and the second electrical conductor in respective positions relative to each other within a layered configuration,the first electrical conductor of each bundle being electrically connected in parallel to the first electrical conductor of the remaining bundles, andthe second electrical conductor of each bundle being electrically connected in parallel to the second electrical conductor of the remaining bundles, wherein within each bundle, the first electrical conductor and the second electrical conductor are configured so that a net magnetic field generated in response to currents flowing within the bundle is zero as seen at a plane oriented transverse to an electrical conduction direction of the cable and located between the first and second ends of the cable.