Most electrical wire is covered in a rubber or plastic coating called insulation. … The purpose of insulation covering the metal part of an electrical wire is to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.
Why is copper wire wrapped in plastic?
Electricity is very dangerous and can kill. Perhaps the most important reason why electrical wires are covered in plastic is to protect people from electrical shock. … Covering electrical wires in plastic guarantees that the electrons flowing through the wires will not flow through your body when the wire is touched.
Why is electrical wiring covered with plastic?
Covering electrical wiring using plastic ensures that the current doesn’t flow outside the system. This avoids shocks, short-circuit etc. … Plastics are non-reactive and poor conductors of electricity or to be precise, they are insulators. They do not allow the electric current to pass through them easily.
What might happen if the plastic or rubber covering on wires was damaged or broken?
When insulation is damaged, exposed metal parts may become energized if a live wire inside touches them. Electric hand tools that are old, damaged, or misused may have damaged insulation inside. If you touch damaged power tools or other equipment, you will receive a shock.
Why cables are made up of copper conducting wires inside and it is covered with PVC insulators outside?
Most wires are made out of copper because it conducts electricity with high flexibility and very little resistance. The first stage in the manufacturing process of a conductor is the wire-drawing. … An insulating cover over the conductor also prevents any current leakages.
What is the plastic coating on electrical wires called?
Most electrical wire is covered in a rubber or plastic coating called insulation.
Why do wires need to be insulated?
Cable and wire insulation prevents the insulated wire’s current from coming into contact with other conductors. It preserves the wire material against environmental threats and resists electrical leakage.
What are wires covered with?
Electrical wires are usually covered with insulating materials, such as plastic, rubber-like polymers, or varnish. Insulating and jacketing of wires and cables is nowadays done by passing them through an extruder. Formerly, materials used for insulation included treated cloth or paper and various oil-based products.
Why is it important that the live wire is always covered in the same Colour of plastic insulation?
The insulation of the wires is colour-coded to ensure correct connection. Each part of the plug has a function.
Why must the plastic from the ends of the wire be cut off?
we remove plastic coating of connecting wires before making circuit because it is an insulator and we know that insulators doesn’t allow electricity to pass through them. so plastic does’t allow electricity to pass through it which leads to the break down of circuit.