Most homes constructed between 1930 and _____________ originally had a 60-amp service.

Homes constructed between 1930 and 1950 typically had a 60-amp electrical service installed as standard. This service level was adequate for the electrical demands of the time, which were much lower than those of modern households. During the post-World War II era, particularly into the mid-1950s, appliance use began to increase significantly, leading to higher power demands. As a result, homes built after this period often had upgraded electrical services, commonly moving to 100-amp or even 200-amp service to accommodate new appliances and technologies.

Therefore, the timeframe between 1930 and 1950 accurately reflects the period in which 60-amp service was the norm for residential properties, making it the correct answer. Choosing a later year, such as 1960 or 1980, would not align with the historical data regarding electrical service standards.