If the fixture's two non-ground wires are not black and white but one of them is smooth and the other has a "ribbed" texture, the ribbed is to connect to the white of the box and the smooth to the other.
Similarly one may ask, what color are positive and negative wires?
Chapter 2 - Color Codes
|Positive (of a positive grounded) circuit||N||white|
|Negative (of a positive grounded) circuit||L-||black|
|3-wire grounded DC Power System|
The black (hot) and white (neutral) wires carry the current, and the copper wire is the ground. Note that the outlet's screw terminals are certain colors. The bare copper or green wire goes on the green screw. And the black wire gets attached to the brass screw.
A second problem with connecting the ground to the neutral happens if your neutral wire breaks between the outlet and your service entrance. Given a ground to neutral connection, this will cause the chassis of your device to be at the "hot" voltage, which is very dangerous.
This means the plug has a small blade for the hot wire and a wide blade for the neutral wire, and the wires feeding those blades should not be reversed when you put a new plug on. Always use a polarized plug for a lamp, extension cord or any other cord that's polarized to begin with.
In most modern fixtures the neutral wire will be white and the hot wire is red or black. In this case, the neutral wire is always identified by some means. In some cases, there will be small writing on the wiring case. In others, there are small ridges or indentations on the insulation.
Line is the side of the device where the wires from the panel (or other equipment feeding the device) are connected. Load is where any devices that are to be protected by the GFCI device are connected. Most "newer" GFCI devices will not reset if they are not connected probably.
Any circuit's black wire should be considered hot or live. Black wire is never used for a ground or neutral wire and should be used as the power feed for a switch or an outlet. A black wire is often used in a circuit as a switch leg, the connection that runs from the switch to the electrical load.
The common wire in an industrial electrical circuit is the neutral wire or ground wire. Find out more about the common wire in an industrial electrical circuit with help from an electrical contractor with over 25 years of experience in the electrical industry in this free video clip.
A polarized plug will have one prong wider than the other, which is the neutral, and usually silver-colored prong. The hot prong will be narrower and usually gold colored. With a non-polarized plug, you can wire either wire to either prong.
The most common requirement of any hardwired automated light switch is a neutral wire. This is a diagram of a switch with a neutral. The black “hot” connection is broken to turn the light on/off, the white “neutral” connection completes the circuit. The bare (hopefully) solid copper wire is the ground.
Colours of inner wires within a cable
|green and yellow stripes||earth|
Feed a length of 14-3 type NM cable (or 12-3, if you're connecting to 12-gauge wire) between the two boxes. The 14-3 cable has three insulated conductors: white, black and red (plus a bare ground wire). Connect the wires to the new three-way switches with ground screws using one of the two wiring diagrams (Fig.
A one way light switch has two terminals which is a common marked as COM or C. The common is for the live wire that supplies the input voltage to the switch. The other terminal is marked as L1 and is the output to the light fixture.
The purpose of the neutral wire is to complete the 120volt AC circuit by providing the path back to the electrical panel where the neutral wire is connected and bonded to the earth ground. The neutral is an insulated wire because it is part of the circuit which flows electrical current.
So even the current returns through neutral (only from a connected load that completes the current flow circuit) you touching the neutral with a 0V cant get you a shock. But its not safe to touch neutral wire! It is possible that the path to ground on neutral is not very good.
If a fault occurs where the live wire connects to the case, the earth wire allows a large current to flow through the live and earth wires. This overheats the fuse which melts and breaks the circuit. If a faulty live wire touches the inside of the plastic case there's little risk as the case is an insulator.
Under normal conditions, a grounding conductor does not carry current. Neutral is a circuit conductor that normally carries current back to the source. Neutral is usually connected to ground (earth) at the main electrical panel, street drop, or meter, and also at the final step-down transformer of the supply.
An ungrounded electrical box, appliance, power tool, or extension cord could become a danger if there is no path to ground, except through you. You see, without a ground wire, your body may complete the ground path and you may be shocked or electrocuted.
Is it a short circuit or a ground fault? A short circuit occurs when a "hot" wire and a "neutral" wire actually touch each other. When this happens, a lot of current flows, causing a fuse to blow or a circuit breaker to trip, not to mention the sparks and pop that is followed generally by a little smoke.
Electricity flows along the path of least resistance. Birds don't get shocked when they sit on electrical wires because they are not good conductors of electricity. Their cells and tissues do not offer electrons an easier route than the copper wire they're already traveling along.