To wire a right-angle welding machine in a distribution box, connect the machine to the appropriate phase lines with proper grounding and overload protection, following safety and manufacturer guidelines.

Step 1: Prepare the Distribution Box

Ensure the distribution box is equipped with an overload protection device (circuit breaker or knife switch) and a grounding terminal. For a 220V welding machine, use one phase line, one neutral line, and one ground wire. For a 380V two-phase welding machine, connect two phase lines plus a grounding wire, and include the neutral if local control is required ( ).

Step 2: Select and Prepare the Power Cable

Use a 2–3 meter connecting wire rated for the welding machine's voltage and current. Ensure the cable is insulated and free from damage. The cable should have clearly marked conductors for phase, neutral, and ground ( ).

Step 3: Connect the Welding Machine

1. Turn off the power at the distribution box before making any connections ( ).
2. Identify the input connectors on the welding machine (usually at the rear).
3. Connect the phase wires from the distribution box to the welding machine input terminals.
4. Attach the grounding wire securely to the welding machine's grounding terminal and to a clean metal surface or the designated grounding point in the distribution box ( ).
5. If applicable, connect the neutral wire to the welding machine according to the manufacturer's instructions.

Step 4: Safety Checks

• Verify all connections are tight and secure.
• Ensure the welding machine is switched off before powering the distribution box.
• Wear insulating gloves, rubber shoes, protective mask, and welding clothing during setup ( ).
• Confirm that the overload protection device is functional to prevent electrical hazards.

Step 5: Power On and Test

• Switch on the distribution box and check for proper voltage at the welding machine terminals.
• Test the welding machine with a small load to ensure it operates correctly.
• Monitor for any sparks, overheating, or unusual noises before full operation.

Additional Tips

• Refer to the welding machine's user manual for specific wiring diagrams and terminal labeling ( ).
• For troubleshooting, use the circuit diagram to verify connections and identify potential issues.
• Avoid using damaged cables or improper grounding, as this can cause electric shock or equipment damage. By following these steps, you can safely and efficiently wire a right-angle welding machine into a distribution box while ensuring compliance with electrical safety standards.