What does insulate mean in electrical wiring?

Answer 1

An insulator is some material which creates a barrier for some form of energy, and makes it difficult for that energy to pass; the usual types would be electrical insulators (such as the plastic that is wrapped around wires), heat insulators (such as clothing, fiberglass insulation etc.), or acoustic insulators which impede the passage of sound (acoustic tiles, or thick walls are examples).

Answer 2

Insulation covers the copper wires that carry electricity to prevent shorting or electrocution. Without insulation, the bare wires could cause an electrical fire, or an electric shock, possibly resulting in death.

Answer 3

Something that insulates, that doesn't easily let something through. Normally used in the context of not letting either heat, or electrical currents, pass easily.

Answer 4

Prevent the passage of electricity to or from (something) by covering it in nonconducting material.

Answer 5

Insulator has two meanings in science. An electrical insulator does not conduct electricity. A thermal insulator limits heat loss. In general, insulator means "non-conductor" of a substance.