Wires are of two groups- (i) ordinary wires and (ii) cables. For electric work conductors are usually made of copper but aluminium conductors are also used mainly because of its low cost. In India a large quantity of copper is imported from other countries. Presently the armature and field coils of different machines and instruments are also made of aluminium wire.
However for fuse wires, use of lead-tin alloy or copper wire is the usual practise. Wires are used for the manufacture of armature and field windings of generators, motors, electrical instruments, etc., and also for house wiring and for drawing overhead transmission and distribution lines. Wires used for house wiring and underground cables have various types of insulation.
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