Final answer:
The most common OCPD in home electrical systems is a circuit breaker, which safeguards against overloads and short circuits.
Step-by-step explanation:
The most common type of Overcurrent Protection Device (OCPD) in a home electrical system is a circuit breaker. Circuit breakers are designed to automatically cut off electrical power in the event of an overload or short circuit, protecting wiring and preventing fires. They are preferred over other types of OCPD, such as fuses, because they can easily be reset after tripping. The most common OCPD in home electrical systems is a circuit breaker, which safeguards against overloads and short circuits.