What are the two primary amperage ratings for straight blade plugs and connectors?

The correct choice identifies 15 amps and 20 amps as the two primary amperage ratings for straight blade plugs and connectors. These ratings are standardized and widely used in the electrical industry for general purpose circuits.

Straight blade plugs, which are commonly found in residential and commercial settings, are designed for different amperage levels to ensure safety and compatibility with various devices. The 15-amp rating is typical for smaller devices and general household appliances, while the 20-amp rating accommodates appliances that require more power, such as power tools and kitchen equipment.

Using these specific ratings helps prevent overload, which can lead to overheating and potential fire hazards. The distinctions between these amperages ensure that circuits and devices can operate safely within their specified limits, contributing to better overall electrical safety standards in installations.