Arc length is the distance between the tip of the electrode and the molten weld pool during welding. Visit weldfabworld.com Follow Technical Master Maintaining the correct arc length is critical because it directly affects arc stability, heat input, penetration, spatter, and weld quality. If the arc length is too short, the electrode may stick and penetration becomes poor. If the arc length is too long, excessive spatter, porosity, and weak welds can occur. As a general rule, the arc length shou