The process of pulling a wire underground is a critical task that requires a systematic approach to ensure safety and the integrity of the wire.

1. Preparation and Planning: First, a clear path must be established. This involves a route survey to identify any existing underground utilities and to choose the correct conduit size for the wire. For any new conduit runs, a trench must be dug to the proper depth as required by local electrical codes.

2. Preparing the Conduit: Before pulling, the conduit must be cleared of any debris. A duct rodder is often used to feed a pull string or a pulling line through the conduit from one end to the other.

3. Attaching the Wire: The wire is then securely attached to the pulling line. A wire mesh pulling grip or "cable sock" is the ideal tool for this, as it distributes the pulling force evenly and protects the wire's insulation. For multiple wires, they are often bundled together and taped to create a smooth, tapered head that won't snag.

4. The Pull: The pulling line is then pulled, drawing the wire through the conduit. For short runs, this can be done manually, but for longer or more complex pulls, a hydraulic cable puller is essential to apply a consistent, controlled force and prevent the wire from being stretched or damaged. Using a wire lubricant also greatly reduces friction, making the pull smoother.

5. Final Checks: After the pull is complete, the wire is terminated at both ends, and continuity tests are performed to confirm that the wire has not been damaged and is ready for service.