Red Seal Construction Electrician Practice Exam

For safety, which wire is typically used as the “hot” wire in a standard electrical circuit?

1. Black

2. Green

3. White

4. Red

The correct answer is: Black

The choice of black wire as the "hot" wire in a standard electrical circuit is based on established color-coding conventions used in electrical wiring. In North America, electrical wiring colors are standardized to enhance safety and minimize the risk of wiring errors. The black wire is commonly assigned as the primary hot conductor, meaning it carries the current from the power source to the load, such as an electrical device or appliance. Using the black wire for the hot connection helps ensure clear identification to electricians, technicians, and anyone working with or around electrical systems. Since the hot wire is responsible for delivering power, it is critical to recognize it correctly to prevent accidental shock or short circuits. The other colors have specific meanings: green is designated for grounding or earth connections, white is typically used for neutral wires that complete the circuit by returning current to the panel, and red may be used as a secondary hot wire in certain configurations. Understanding these color codes is essential for safe electrical work and avoids potential hazards associated with improper connections.