Question

Why must the plastic or rubber coverings from the ends of wires be removed before making connections? What is the covering called?

Answer 1

1. Plastics and rubber coverings are insulator materials.
2. Electricity can not pass through insulators.
3. The covering of insulator materials on conductor wire is called as insulation.
4. Insulation prevents direct contact between conductor wires and breaks the circuit, therefore the plastic or rubber coverings from the ends of wires need to be removed before making connections.