What type of receptacle is permitted in a dwelling unit garage for one appliance if it is located within the appliance?

In the context of the National Electrical Code (NEC), a receptacle that is permitted for use within a dwelling unit garage for a single appliance and is located within that appliance refers to a single receptacle. This is in accordance with the NEC's safety standards, which require that specific installations be well-defined and suitable for their intended use.

For a single appliance, having a single receptacle helps to ensure that the appliance can be easily connected without the risk of overloading a circuit or creating confusion about which appliance is being powered. Additionally, NEC guidelines emphasize the importance of convenience and safety in residential settings, particularly in areas like a garage where equipment may require specific power sources.

While other types of receptacles are used in various circumstances, a dual receptacle or a standard duplex receptacle may allow for multiple connections, which are not typically needed when the receptacle is designated solely for one appliance within its own structure. In this case, a GFCI receptacle might also be applicable for certain appliances, particularly those in potentially wet environments, but the question specifically focuses on the appropriateness of receptacle types for a dwelling unit garage tied to a single appliance. Thus, a single receptacle is the most appropriate and compliant choice for this situation.