What is the standard color code for electrical wires in the U.S.?

The standard color code for electrical wires in the U.S. is particularly important for ensuring safety and consistency in electrical installations. The correct choice specifies that black is used for hot wires, white for neutral wires, and green for ground wires.

Hot wires carry electricity from the source to the load, and using black for this purpose is widely recognized across various electrical codes. The white wire is designated as neutral, which serves as the return path for current; it is not energized under normal conditions, providing a safe point for connecting equipment. The green wire is reserved for grounding, which is critical for safety by preventing electric shock and equipment damage in the event of faults.

This color-coding system is supported by the National Electrical Code (NEC), which serves as a standard for electrical installations in the U.S., helping ensure that electricians and personnel can identify wire functions quickly and accurately. Understanding this color code is essential for anyone working with or studying electrical systems.