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Wirewound resistors have been electrical passive components which limit current with the wire material featuring high resistivity. Their resistive elements exist out of the metallic wire insulated that has been winded around the non-conductive material core.The resistive elements are existing out of metal wire that is insulated and winded around a non-conductive core material. These resistors are usually made up of copper-nickel-manganese which is called as “Manganin” or nickel-chromium (Nichrome) materials. Such wire wound resistors had been an old type of resistor. However, these have been still manufactured today. These may be produced very accurate and has excellent properties of low resistance values and high power rating. 

Construction of the wire wound resistors are depending on some factors. This actually involves manufacturing and selection of materials which depend upon the way that the resistor has been used in circuits. The resistance value varies on the resistivity of the wire including its length and even the cross section. For higher tolerance measurement, resistance value must be measured. This is to identify the accurate cut for the wire length. To make the resistance high, the diameter of the wire should be small enough while its length must be long. 

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