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According to nec a black or red wire must be used as an ungrounded conductor or hot wire.
Home wiring colors usa. It does this through the neutral. Typically considered neutral but can sometimes be used as a hot lead in certain situations such as switch loops. Identifying house electric wiring colors. The coloring is as follows.
Black white bare copper and other colors closely intermingle yet each one has a specific purpose. Black gray silver white colored fabric covered nmc electrical wire insulation the exterior insulation on cloth or fabric insulated nmc electrical wires are often black silver or white but may also be black or brown. No wire with any of those colors can be used for establishing a ground or neutral connection. All other insulation colors.
Instead blue and yellow wires are used as the live wires pulled through a conduit. Positive the wire for the positive current is red. White and gray wires can only be connected to other white and gray wires. Although neutral these wires still may carry a current especially an unbalanced load so handle with caution.
Different colors represent different electrical currents and will be found in certain groups of home applications. Ground the ground wire if present will be white or grey. Negative the wire for the negative current is black. To complete the circuit the current must return to the power source.
Home wiring colors black red blue brown orange and yellow phases white and gray neutral green and bare conductor protective earth ground green yellow stripe ground or isolated ground. In fact any color wire except white gray or green may be used in conduit to carry ungrounded power. Black and red wires. For example you might see yellow wires as switch legs to ceiling fans structural lights and outlets paired with light switches.
White wires are typically found in residential buildings while gray ones can be found in commercial settings. Opening up an outlet or light switch box you might be confronted with a bewildering array of wires of different colors. Black red black and red wires are used as hot wires. Green insulation and bare copper.
Hot wire that carries a current. The wire that carries the current from the power source to the outlet or receptacle is the hot wire. Whenever you see a black wire you.
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