What is insulating tape used for in electrical work?

Insulating tape is primarily used in electrical work to cover wire joints and exposed conductive parts. This is crucial because it helps to prevent short circuits by providing a protective layer that can withstand electrical current, thereby insulating live conductors from each other and from any underlying surfaces. The tape is also effective in protecting against moisture, dirt, and potential physical damage, which could compromise safety.

The other functions indicated in the remaining choices do not accurately reflect the primary purpose of insulating tape. While it may offer some minor reinforcement to wire connections or contribute to protection against heat, its main role is insulation and protection of electrical joints and exposed wires to ensure safety and functionality in electrical systems.