What is the primary reason for exposing the conductor and removing insulation?

The primary reason for exposing the conductor and removing insulation is to promote good connection to the splices. When conducting electrical work, ensuring a solid and efficient connection between wires or components is essential for the system's integrity and performance. A good connection minimizes resistance, which can lead to overheating and potential failure. By stripping the insulation, the bare metal of the conductor is exposed, allowing for secure connections, whether they are twists, soldered joints, or use of connectors.

Other options, while they reflect different considerations in electrical work, do not address the fundamental need for a reliable electrical connection. Cutting ease, appearance enhancement, and insulation resistance could be important in specific contexts, but the core requirement in this context is achieving a secure and effective splice connection.