<P> For application where the wire moves, 19 is the lowest that should be used (7 should only be used in applications where the wire is placed and then does not move), and 49 is much better . For applications with constant repeated movement, such as assembly robots and headphone wires, 70 to 100 is mandatory . </P> <P> For applications that need even more flexibility, even more strands are used (welding cables are the usual example, but also any application that needs to move wire in tight areas). One example is a 2 / 0 wire made from 5,292 strands of #36 gauge wire . The strands are organized by first creating a bundle of 7 strands . Then 7 of these bundles are put together into super bundles . Finally 108 super bundles are used to make the final cable . Each group of wires is wound in a helix so that when the wire is flexed, the part of a bundle that is stretched moves around the helix to a part that is compressed to allow the wire to have less stress . </P> <Ul> <Li> Hook - up wire is small - to - medium gauge, solid or stranded, insulated wire, used for making internal connections inside electrical or electronic devices . It is often tin - plated to improve solderability . </Li> <Li> Wire bonding is the application of microscopic wires for making electrical connections inside semiconductor components and integrated circuits . </Li> <Li> Magnet wire is solid wire, usually copper, which, to allow closer winding when making electromagnetic coils, is insulated only with varnish, rather than the thicker plastic or other insulation commonly used on electrical wire . It is used for the winding of motors, transformers, inductors, generators, speaker coils, etc . (For further information about copper magnet wire, see: Copper wire and cable #Magnet wire (Winding wire).). </Li> <Li> Coaxial cable is a cable consisting of an inner conductor, surrounded by a tubular insulating layer typically made from a flexible material with a high dielectric constant, all of which is then surrounded by another conductive layer (typically of fine woven wire for flexibility, or of a thin metallic foil), and then finally covered again with a thin insulating layer on the outside . The term coaxial comes from the inner conductor and the outer shield sharing the same geometric axis . Coaxial cables are often used as a transmission line for radio frequency signals . In a hypothetical ideal coaxial cable the electromagnetic field carrying the signal exists only in the space between the inner and outer conductors . Practical cables achieve this objective to a high degree . A coaxial cable provides extra protection of signals from external electromagnetic interference, and effectively guides signals with low emission along the length of the cable which in turn affects thermal heat inside the conductivity of the wire . </Li> <Li> Speaker wire is used to make a low - resistance electrical connection between loudspeakers and audio amplifiers . Some high - end modern speaker wire consists of multiple electrical conductors individually insulated by plastic, similar to Litz wire . </Li> <Li> Resistance wire is wire with higher than normal resistivity, often used for heating elements or for making wire - wound resistors . Nichrome wire is the most common type . </Li> </Ul> <Li> Hook - up wire is small - to - medium gauge, solid or stranded, insulated wire, used for making internal connections inside electrical or electronic devices . It is often tin - plated to improve solderability . </Li>

What type of wire is used in generators