Industrial Maintenance Technician Practice Test 2025 – Your All-in-One Guide to Exam Success!

Question: 1 / 400

In a 100-220 volt three-wire circuit, what is the typical color of the neutral wire?

Red

Green

White

In a 100-220 volt three-wire circuit, the typical color for the neutral wire is white. In electrical systems, color coding is essential for ensuring safety and reliable connections. The white wire serves as the neutral conductor, which carries the return current back to the power source. This is critical in maintaining a balanced circuit and preventing electrical shocks or surges.

In most standards for electrical wiring, green is designated for grounding purposes, while black and red are typically used for the hot wires that carry the current to the load. Understanding the color codes and their meanings assists technicians in diagnosing circuit issues, performing safe repairs, and ensuring compliance with electrical codes.

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