The white neutral wire this wire is connected to the silver screw on the electrical receptacle often labeled neutral. The white wire is the neutral wire which takes any unused electricity and current and sends them back to the breaker panel.
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Two white wires which is ground. The third conductor is bare copper. I removed the old light fixture and it had two white wires one pure white the other white with a thin blackgrey line visible and the ground copper line. The white wire is always neutral and when the cable has only two conductors as most 120 volt cables do the hot wire is black. According to standards in use since the mid 1900s a wire color code identifies the purpose of each wire in an electrical circuit. On a conventional 120 volt two pronged electrical outlet that accepts grounded plugs two prongs plus the rounded center ground connector prong your circuit will have three wires. Since those appliances dont require a neutral but use two current carrying conductors and a ground wire an electrician may repurpose the white to carry the secondary phase also called a.
The plain or it can sometimes be green wire is the ground wire which will take electricity back to the breaker panel then outside to a rod thats buried in the ground. Two of the conductors in nmb cable are covered with plastic insulation one white the other black. The magnet that operates the electric brakes does not require the wires to be specific. Essentially you connect the white and bare wires directly to the light and switch the black wire hot through a switch. In the course of replacing this light receptacle i came across two white wires. The ground wire is usually left bare but in some cases the ground wire color is green.
The black wire is the hot wire which provides a 120 vac current source. In the outlet box you will have a black white and bare ground wire. If you are referring to two white wires from the brake magnet that are coming from the rear of each electric brake assembly then it would not matter which wire is connected to ground and which wire is used for the brake feed. However if you need to rewire a light switch or a plug socket you may occasionally come across two black wires. The united states has strict codes relating to home wiring including clearly defined colors on the outer casing of the wires. Black means hot white signifies neutral and green indicates ground.
How do you find out which wire is hot or the black wire. These conductors are designated as follows.
Gallery of Two White Wires Which Is Ground
