How to Splice Wire
Last updated on Oct 27, 2025
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Introduction
Go to step 1 ↓The purpose of this guide is to instruct users on how to effectively repair a broken wire, as they commonly become damaged. This guide will cover how to repair stranded wire and solid-core (single strand) wire.
Note: to efficiently complete the following guide, it's crucial to know how to strip wires. The following link can be used as a guide for wire stripping before continuing.
Stripping Wire: Wire Stripping
What you need
Parts
Tools
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Set your tools down on a clean, non-flammable surface.
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Attach a stripped wire end to each of the helping hands clips, facing the ends towards each other.
Ask FixBot
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Cut a piece of heat-shrink tubing such that it's 10-15Â mm longer than one of the exposed wire ends.
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Slip the heat shrink over one of the wires, making sure to move the heat shrink away from the soldering point as to avoid any burning.
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Unravel all of the wire strands for both the wires, intermesh them, and then twist the strands together.
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Tool used on this step:FixHub Smart Soldering Iron$79.95
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Place the tip of a soldering iron against the exposed wires. You want to heat the wires hot enough such that they'll readily melt the solder.
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Slowly feed solder wire into the heated wire. The wire strands should readily absorb the molten solder.
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Feed solder wire along the exposed wire until everything is thinly coated.
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Once the molten solder saturates the wire strands, allow the solder joint to cool down and solidify (2-3 minutes).
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Slide the heat-shrink over the exposed solder joint so that it completely covers the joint and the surrounding insulation.
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Wave a heat source (lighter or heat gun) over the heat-shrink material to activate it. Apply heat until the heat-shrink has shrunk securely around the solder joint.
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You have successfully soldered two wires together!
For more soldering tips and guides, click here.
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Team
University of Arizona, Team 3-6, Cools Stephens Spring 2024 Member of University of Arizona, Team 3-6, Cools Stephens Spring 2024
ARIZONA-COOLS STEPHENS-S24S3G6
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