Which wire is typically colored black, red, or blue in electrical systems?

In electrical systems, the wires that are typically colored black, red, or blue are associated with the positive or hot wire. These colors are used to indicate that the wire carries electrical current from the power source to the load. Black wires are commonly used as the primary hot wire in residential wiring, while red and blue often serve as secondary hot wires, especially in three-phase systems or when multiple circuits are involved.

This designation is important for safety and proper functioning of electrical systems. Knowing which wires are hot ensures that individuals handling the wiring are aware of the potential for electrical shock or short circuits. The convention of using specific colors for different purposes helps maintain consistency and clarity in electrical installations, making it easier for technicians and electricians to identify the proper wires during installation, maintenance, or troubleshooting.