The only way to positively identify wires used for any application is to purchase a good volt tester and understand how to use it. When wires or cables such as Romex are used with switching applications and as Switch Legs, the function of a colored wire may be different from what is noted here. Red wire blue, or other colors also indicate hot wires. The hot wire carries power from the panel to the device you are wiring. The neutral wire carries power back to the service panel.īlack wire indicates the hot wire. *The individual wires on the diagram should be colored the same as the actual wires you will be using. Featuring diagrams for the most common electrical devices used in the homeĮlectrical switch diagrams that are in color have an advantage over ones that are black and white only.
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