A single receptacle connected to a 30-ampere branch circuit must have a minimum rating of?

A single receptacle connected to a 30-ampere branch circuit is required to have a minimum rating of 30 amperes. This is based on the principle that the receptacle must be able to handle the maximum current that the circuit is designed to carry. If the receptacle were to have a lower rating, such as 15, 20, or 25 amperes, it would not be safe, as it could potentially lead to overheating or failure of the receptacle when the circuit carries its full load.

In electrical systems, ensuring that all components, including receptacles, match the circuit requirements is critical for safety and reliability. The 30-ampere rating of the receptacle ensures that it can safely support the maximum load that may be present on that branch circuit without risking damage or creating hazardous conditions. This is an important aspect of electrical safety standards that help prevent equipment failure and reduce the risk of fire.