Final answer:
A duplex receptacle whose top and bottom halves are on individual dedicated circuits is wired so each half is connected to a separate circuit breaker, thus allowing independent control and usage.
Step-by-step explanation:
The definition of a duplex receptacle whose top and bottom halves are on individual dedicated circuits is a duplex receptacle wired in such a way that each half operates independently of the other with separate power sources. This configuration allows the user to run appliances or equipment on different circuits, which can be useful for managing electrical load and for safety purposes. Typically, such a duplex receptacle is split internally, and each half is connected to its own circuit breaker in the electrical panel, thereby providing the capability for independent control. Duplex receptacles that have both halves wired to separate circuits can also help in situations where appliances require dedicated power to ensure they do not interfere with each other or overload a circuit.
It's important to mention that for a standard three-hole outlet (referencing Figure 23.33 and Figure 10.44), which includes a standard three-prong plug, the plug can only be inserted one way to assure proper function of the three-wire system, which comprises a hot wire, a neutral wire, and a ground wire.