What is the job of an insulator?

Answer 1

Thermal insulator, prevent heat loss and protect human or machine from heat.

Electrical insulator, prevent human and machine from electrical hazard and prevent short circuit that would damage electrical appliance.

Answer 2

An insulator is a material that does not conduct electricity well and is used to prevent the flow of electricity. In electrical systems, insulators are used to separate conductors and prevent them from touching each other, reducing the risk of electrical shocks or short circuits. Insulators are also used to maintain the temperature of a system by preventing heat transfer.