Electrical receptacles come in which two basic varieties?

Electrical receptacles indeed come in two basic varieties: straight blade and locking.

Straight blade receptacles are the most commonly used types in residential and commercial applications. They allow for standard plug connections, providing convenience for everyday electrical devices. These receptacles are designed for ease of use and typically accommodate a variety of plugs and appliances.

Locking receptacles, on the other hand, are designed for specific applications where a secure connection is essential. These types of receptacles use a locking mechanism that prevents the plug from being inadvertently disconnected from the socket during use. This feature is crucial in environments where movement or vibration could cause a standard plug to lose contact, such as in industrial settings or outdoor events.

This distinction between straight blade and locking receptacles highlights the variety of electrical safety features and functional designs available to accommodate different electrical needs and environments.