What is usually necessary to properly ground portable electric hand tools?

To properly ground portable electric hand tools, the use of a three-prong plug is essential. The three-prong plug is designed with one prong for the live wire, one for the neutral wire, and a third prong that connects to the ground. This grounding prong provides a safe path for electrical current in the event of a fault, helping to prevent electric shock and equipment damage.

By ensuring that the tool is connected to a grounded outlet using a three-prong plug, operators significantly reduce the risk of electrical hazards. Tools that only have a two-prong plug do not have this crucial grounding feature and may pose a higher risk of electrical shock. Additionally, while circuit breakers and extension cords can play important roles in electrical safety, they do not serve the specific function of grounding that a three-prong plug provides.