What type of receptacle outlet is mandated for installation on a 15A or 20A branch circuit?

The correct answer is the grounding type receptacle outlet, which is mandated for installation on a 15A or 20A branch circuit. Grounding type receptacles have a grounding terminal and are designed to provide a safe pathway for electrical fault currents, helping to prevent electrical shock hazards. This enhanced safety feature is crucial in residential and commercial buildings, especially in wet or damp areas where the risk of electrical shock is higher.

Grounding fulfilled by these types of receptacles is in compliance with electrical codes and regulations, ensuring that any fault that may occur can be safely redirected to the ground. The grounding type receptacle also allows for the use of three-prong plugs, which offer an additional layer of safety by properly grounding the connected equipment.

Other receptacle types, such as standard, GFCI (Ground Fault Circuit Interrupter), and non-grounding, do not meet the same safety standards when it comes to branch circuits of this amperage. While GFCI outlets also provide safety by protecting against ground faults, the grounding type outlet specifically addresses the need for proper grounding on these circuits, making it the mandated choice. Non-grounding outlets lack the grounding feature entirely, which can increase the risk of shock and are therefore not suitable for use in