Which color is commonly used for electrical wiring for common plug-in devices?

The color black is commonly used for electrical wiring associated with common plug-in devices, particularly in residential and commercial wiring systems. In the context of electrical wiring, black typically indicates a "hot" or live wire, which carries electrical current to the device. The use of black for these types of wires allows for consistent identification and helps ensure safety in electrical installations.

This understanding is crucial for anyone working with electrical systems, as it aids in proper wiring practices and minimizes the risk of accidents or electrical faults. While other colors may also have specific uses—such as red for secondary hot wires or white for neutral wires—black is standard for main power feed in many applications.