To connect welding wire to a distribution box, strip the insulation, twist the wires, clamp the negative contact, and weld using a controlled electric arc to ensure a secure, low-resistance connection.

Step-by-Step Instructions

1. Prepare the Wires Strip the insulation from the welding wire ends by 60–70 mm to prevent melting during welding. For stranded wires, remove any loose strands to create a clean bundle . 2. Form a Twist Twist the prepared wire ends together. The twist should be approximately 50 mm long, ensuring tight contact between the wires. The type of twist is flexible, but it must allow the molten metal to cover the entire bundle during welding . 3. Clamp the Negative Contact Attach a clamping device (negative contact from the welding machine) about 25–30 mm from the end of the twist. This ensures proper current flow and stabilizes the wires during welding . 4. Apply the Electric Arc Bring the welding electrode close to the wire twist and briefly touch it to ignite an electric arc. Maintain the arc for 1–2 seconds depending on wire thickness and current strength. The molten metal should form a spherical drop covering the wire ends . 5. Complete the Connection Move the electrode away to stop the arc once the wires are joined. Inspect the weld to ensure it is smooth, uniform, and free of air holes or cracks. For stranded conductors, a crimp sleeve may be used before welding to improve stability .

Safety and Quality Considerations

• Ensure the distribution box is properly grounded and disconnected from power before starting .
• Avoid overheating the wires to prevent insulation damage. Use a cooling radiator if necessary .
• Check that the welding seam is uniform and free of defects, and that bolt connections in the box are secure with flat and spring washers .
• Follow the manufacturer's specifications for wire gauge, terminal type, and welding current to maintain safety and compliance . By following these steps, you can achieve a reliable, low-resistance connection between welding wires and a distribution box, suitable for high-power welding applications.