What are the standard sizes for electrical switches?

The standard sizes for electrical switches are typically categorized by their current rating, which specifies the maximum current the switch can handle safely without overheating or causing a hazard. In residential and commercial applications, switches are commonly rated at 15A and 20A for standard circuits, while heavier duty requirements may use switches rated at 30A and above for applications like larger appliances or equipment.

The option identifying sizes 30A, 60A, and 100A reflects a range that is consistent with various electrical needs in industrial and commercial settings, where equipment may require higher current ratings. Switches rated at these ampacities are designed to manage the electrical loads associated with larger systems safely, ensuring both functionality and safety according to established standards and codes.

In contrast, the other options do not accurately represent common standard sizes for individual switches found in typical electrical systems, especially when considering residential and light commercial use where 15A and 20A ratings are far more prevalent.