Wires & Cables

Energy & EnvironmentWires & Cables

1Conductors----High Resistance-------------Low ResistanceA conductor has many free electrons so is good at transferring electrical currentGood ConductorBad ConductorConductance is the opposite of resistanceIt is measured in Mhos (ohm backwards)

2Different types of conductorsMaterial UsedCopper

High conductivityEasily solderedHeavier & more expensive than aluminumCopper used in house wiring

1mm2, 1.5mm24mm2 , 6mm2Aluminum

60% conductivity of copperCheap & lighter than copperLowest conductivityHeavier than aluminumGalvanized Iron (GI)

Used in overhead lines

3Different types of conductorsRespective of their propertyGood Conductors

Bad Conductors

Medium resistanceUsed for converting electrical energy into heat, light & soundPVC, glassHigh resistanceNon ConductorsCarry current

Low resistanceCopper & AluminumTungsten & NichromeInsulators

Wires & cables use conductors & non conductors to their advantage

4Different types of conductorsPhysical AppearanceSolid Conductor

Used in cables.e.g. copper, aluminum, steelStranded Conductor

Flexible

1.13 to 3.73 mm diameter1, 7, 19, 37 stands

Multi stranded Conductor

0.2 or 0.3 mm diameter14, 22, 24,84 strands Flexible Conductor14, 23, 40 strands