Which of the following is a common capacity for residential electrical service panels?

The capacity of 100 amperes is a common standard for residential electrical service panels. This rating is often sufficient for the typical electrical needs of a modern household, including general lighting, small appliances, and larger devices such as refrigerators and washers. A 100 amp service is usually adequate for homes with an average number of electrical devices and equipment.

This capacity allows for safety and efficiency in delivering power to various circuits within the home. As electrical demands have increased over the years due to the rise of energy-consuming devices, the 100 amp service has become the baseline for most new homes and updates to older homes. It is important in ensuring that the electrical system can handle the load without risking overloads or potential hazards.

Lower capacities, such as 60 or 75 amperes, are less common today because they may not adequately support the electrical loads expected in an average household. Higher capacities, like 250 amperes, are typically reserved for more substantial structures or homes with specific high-demand needs but are not the standard for typical residential use.