Yellow electrical wire is a vital component of many electrical wiring systems, and it is important to understand its purpose and function for safe wiring practices.
Yellow is used for the line side of an ungrounded system, which is typically 120- or 220-volt AC power in the United States. This type of wiring creates a closed loop, where the hot wire is the source of the electricity, and the neutral wire is the return path. The neutral wire may be white, but certain types of yellow wire are also used. Yellow wire is typically used for three-way switches or four-way switches in places where two separate circuits cross each other.
The yellow wire is also used in some communications cables such as CAT 5 cable. It is used to deliver data signals such as network communication, audio, and video. Many Ethernet cables contain one or more pairs of yellow wires, but it is important to note that each communication system may require different colored wires.
Some residential wiring projects only require yellow wires when the AC power is daisy chained from one outlet to another, or for rewiring existing outlets and switches. Most wiring diagrams show both white and yellow wires, so it is important to remember which color should be used in each application.
When it comes to electrical wiring and safety, yellow wires should only be handled by qualified individuals who understand the importance of proper installation and maintenance. Always use caution when dealing with any type of electrical wiring, and make sure to follow local codes and regulations for safety purposes.
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