What is the purpose of proper grounding in welding?

• A. To minimize heat input and prevent warping.
• B. To increase arc stability by adjusting electrode angle.
• C. To complete the electrical circuit and prevent shock and ensure stable arc.
• D. To comply with environmental regulations.

Answer: (C)

Grounding provides the return path for the welding current, completing the electrical circuit. The power source drives current from its output through the electrode and across the arc into the workpiece, and the ground connection returns that current to the source. A solid ground creates a low-resistance path, which helps keep the arc stable and reduces the risk of electric shock by directing fault currents safely away from you. Without a proper ground, current can travel through unintended paths, leading to an unstable arc, weld defects, or electric shock. The ground clamp should be attached to clean, conductive metal that is part of the circuit. The other options describe adjusting technique or regulatory concerns, not the fundamental purpose of grounding.