Where should the work or ground clamp be attached to prevent current from passing through mechanical or electrical parts?

• A. on the gas line
• B. on the workbench
• C. near the weld
• D. on the power supply

Answer: (C)

Keep the return path as direct and close to the weld as possible. Attach the ground clamp to the workpiece near the weld so the current travels through the metal you’re joining back to the power source, instead of through other parts of the setup. This minimizes resistance in the return path, reduces heating and wear on fixtures or the table, and lowers the risk of stray current damaging equipment or causing shocks. If the clamp were placed on a gas line or the workbench or tied to the power supply instead, the current would seek alternative routes, heating or damaging those parts and creating unsafe conditions. Near the weld ensures a stable arc and a safer, more efficient current path.