Abstract
This chapter describes large-current conductors used in coils. It also describes power transmission cables. Superconducting single wires can carry a couple of tens to a couple of hundreds of amperes of current in practical operating conditions including temperatures and magnetic fields, but these magnitudes of current are not always large enough. A superconductor cable is an assembly of superconducting round wires or flat tapes in order to increase the current-carrying capacity. A Rutherford cable is a flat single-stage cable. In a Rutherford cable, strands are twisted and compacted well to form a cable with flat rectangular cross-section. In a cable in conduit conductor (CICC), a multi-stage cable is jacketed into a metal conduit which also serves as structural support. The advantages of CICC include very large current-carrying capacity, tolerance to high voltage, and mechanical strength. The chapter describes the inter-strand coupling losses and current distribution among strands, which affect stability.
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