Which type of receptacle is most commonly used in residential settings?

The standard grounding duplex receptacle is the most commonly used type in residential settings because it provides both safety and versatility. Grounding receptacles are designed to accept plugs that require a ground for electrical safety, reducing the risk of electric shock and equipment damage. They have a third hole for grounding which connects to the grounding system of the electrical installation, ensuring that any fault current will have a direct path to the ground. This feature is crucial in homes where appliances and devices can pose electrical hazards without proper grounding.

In addition, standard grounding duplex receptacles can accommodate both polarized two-prong and three-prong plugs, making them suitable for a wide range of household appliances and electronic devices. Their general use in living areas, kitchens, and other spaces where electrical appliances are commonly used highlights their importance for everyday electrical needs.