**Final Answer:**
Peninsulas and islands that have a long dimension of 200 feet or greater are required to have one receptacle.
**Explanation:**
According to the National Electrical Code (NEC) in the United States, the code stipulates that outdoor areas, such as peninsulas and islands, exceeding certain dimensions must have electrical receptacles for safety and convenience. Specifically, Article 210.52(C)(1) of the NEC states that for outdoor spaces such as these, one receptacle must be installed for each 200 feet (or fraction thereof) of the space's long dimension.
For instance, if a peninsula or island measures 250 feet in its longest stretch, it would require one receptacle. However, if the measurement is 400 feet, it would mandate two receptacles due to the fraction of the long dimension exceeding 200 feet.
This calculation ensures an adequate distribution of electrical outlets for these outdoor spaces, allowing for convenient access to power sources while maintaining safety standards. The requirement is designed to accommodate larger outdoor areas, preventing the need for excessive use of extension cords and promoting safer electrical practices in such spaces.