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A safety feature for many home appliances and power tools is the use of 3-wire cords and plugs. This configuration typically includes a live wire, a neutral wire, and a ground wire. The ground wire serves a crucial role in electrical safety by providing a path for electrical current to safely dissipate in the event of a fault or short circuit. If the appliance develops a fault and the metal casing becomes energized, the ground wire allows the electricity to flow to the ground rather than through a person, reducing the risk of electric shock.

In contrast, using a 2-wire cord only provides live and neutral connections without a grounding element, which could increase the risk of electrical shock if an equipment malfunction occurs. The choice of voltage operation (115-volt or 230-volt) does not inherently provide the same level of safety as having a third wire dedicated to grounding. Thus, the presence of a 3-wire cord and plug setup enhances the overall safety of home appliances and power tools.