IBEW Electrical Practice Test 2025 – Complete Exam Preparation

Question: 1 / 400

What color is used to indicate a neutral wire in electrical systems?

Red

Black

White or gray

In electrical systems, white or gray is the color designated for neutral wires. This standard is important for ensuring safety and consistency in wiring practices. The neutral wire serves as a return path for current and is typically connected to the ground at the main service panel, which helps maintain a balanced electrical system.

Using white or gray as the color for neutral wires facilitates easy identification, reducing the risk of errors during installation and maintenance. This adherence to color codes is essential in preventing dangerous situations, such as mixing up the neutral and hot wires, which could lead to shocks or equipment damage.

Other colors, such as red or black, are typically used for hot wires and indicate a different function within the electrical system. Understanding these color codes is crucial for anyone working with or learning about electrical wiring.

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