Nate Electrical Practice Exam 2025 - Free Electrical Practice Questions and Study Guide

In a standard 120V electrical wiring system, the color used for the hot wire is black. This is a widely adopted convention in electrical wiring, where the black wire is designated as the hot wire that carries live electrical current. Understanding the color coding of wires is crucial for safety and proper installation in electrical systems.

The hot wire provides power to electrical devices, and distinguishing it from other types of wires ensures that electricians and users can work safely without the risk of electrical shock or short circuits.

In contrast, white is typically reserved for the neutral wire, which carries current away from the device and back to the electrical panel. Red wires can also be used as hot wires, particularly in 240V circuits or as secondary hot wires in specific setups, but for standard 120V circuits, black is the predominant color. Green is designated for grounding, ensuring that the circuit is safely earthed to prevent shock hazards.

Consequently, recognizing the black wire as the hot wire is essential for anyone working with electrical systems to maintain safety and adhere to code requirements.