Receptacles connected to a 30A branch circuit supplying multiple outlets must be rated at a minimum of how many Amperes?

To determine the minimum rating for receptacles connected to a 30A branch circuit supplying multiple outlets, it's essential to understand the relationship between the branch circuit and the devices connected to it. When a branch circuit is rated at 30 amperes, any receptacles connected to that circuit must be capable of safely handling the maximum current that the circuit can provide.

Therefore, receptacles would need to have a minimum rating that matches or exceeds the branch circuit’s capacity to ensure they can handle the load without risk of overheating or failure. This is why a receptacle rated for 30 amperes is the minimum requirement. Using receptacles rated lower than the circuit's rating can lead to overheating and potential hazards since the receptacle would be unable to handle the maximum current supplied by the circuit.

The other choices provide ratings that would be inadequate for a 30A circuit. For instance, receptacles rated at 20A or 25A would not be appropriate, as they could pose a safety risk under heavy load conditions. In order to maintain safety and compliance with electrical standards, the receptacles must be rated appropriately.