What is the polarity of the ground when using straight polarity?

When using straight polarity in Shielded Metal Arc Welding (SMAW), the polarity of the ground is positive. This means that the electrode is connected to the negative terminal of the power supply, while the workpiece is connected to the positive terminal.

In this configuration, it is significant because the arc is established between the negatively charged electrode and the positively charged workpiece. Straight polarity is often used for welding certain materials and provides better penetration, making it preferable for applications where deeper welds are necessary.

Understanding the role of polarity is crucial since it influences the heat distribution and penetration capability of the weld. With positive polarity, more heat is generated at the workpiece, enhancing the welding process's efficiency for particular base metals and filler materials.