During PAC system setup, which action ensures electrical safety to the work piece?

During PAC system setup, which action ensures electrical safety to the work piece?

• A. Power off the machine
• B. Remove the ground connection
• C. Connect ground to the work piece
• D. Lay magnet near the table

Answer: (C)

Grounding the work piece provides a safe, low-impedance path for the welding or cutting current back to the power source. This closes the electrical circuit through the work piece, so the operator isn’t part of the return path and any fault current goes to earth via the ground clamp. A solid ground also helps protection systems detect faults and prevents unintended current from energizing the work surface or clamps. For best results, attach the ground clamp to a clean, bare-metal area of the work piece with a tight, corrosion-free connection. Other options don’t establish this safe return path: powering off stops power but doesn’t ensure a safe operation, removing the ground increases shock risk, and laying a magnet nearby does nothing to improve electrical safety.

Grounding the work piece provides a safe, low-impedance path for the welding or cutting current back to the power source. This closes the electrical circuit through the work piece, so the operator isn’t part of the return path and any fault current goes to earth via the ground clamp. A solid ground also helps protection systems detect faults and prevents unintended current from energizing the work surface or clamps. For best results, attach the ground clamp to a clean, bare-metal area of the work piece with a tight, corrosion-free connection. Other options don’t establish this safe return path: powering off stops power but doesn’t ensure a safe operation, removing the ground increases shock risk, and laying a magnet nearby does nothing to improve electrical safety.