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.
Keeping this in view, what does it mean when white wire has black tape?
Ground wires (grounding conductors) have either a green insulation jacket or they are bare wires. Neutral wires (grounded conductors) should be white. A white tape band indicates that the wire is a neutral, black or red tape indicates hot, and green means ground.
Black, Red and Blue are used for hot wires and White is used as the neutral wire in a 120/208 V circuit. Brown, Orange and Yellow are used as hot wires and gray is used as the neutral wire in a 277/480 V. For grounding, regardless of the voltage, Green is used.
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 white wire goes on the silver screw. The bare copper or green wire goes on the green screw.
4 Answers. Ribbed, grooved or striped side is grounded (neutral), smooth side is ungrounded (hot). Silver conductor is grounded (neutral), copper conductor is ungrounded (hot).
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|
Lamp power cords are usually single color paired wire (white, brown, etc). Look at the wire carefully. One side will have ribs on it and the other side will be smooth and will probably have markings on it. The smooth side is the hot and the ribbed side is the neutral.
The wide prong on the plug links the threaded base of light bulbs to the neutral terminal (the wider slot) in the receptacle. If the wires are reversed, the hot side of the outlet (the side that can deliver a shock) is wired to the threaded socket.
The solid/dashed lines on wires like the ones pictured in your question are used to indicate polarity e.g. for the "wall wart" power supplies. Usually* the wire with the white stripe or the dashed lines carries the "positive" (+) end, while the other, unmarked wire carries the "negative" (-) end.
There are also positive and negative cables in the jumper cable set. The red one is positive (+), the black one is negative (-). Never connect the red cable to the negative battery terminal or a vehicle with a dead battery.
Wiring Color Codes. Black wires identify negative or hot wires. Switches connect on negative side of battery to the load (light). White wire is used to identify the positive polarity.
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.
There's a hot wire (positive), a neutral wire, and ground. I ~assume~ that in an AC circuit, positive correlates to positive, neutral to negative, and ground to ground. Transformers will correlate the +/- when changing DC.
In DC circuits, the positive pole is usually marked red (or "+") and the negative pole is usually marked black (or "−"), but other color schemes are sometimes used in automotive and telecommunications systems.
Neutral: The white wire is called the neutral wire. Ground: The bare wire is called the ground wire. Like the neutral wire, the ground wire is also connected to an earth ground. However, the neutral and ground wires serve two distinct purposes. The neutral wire forms a part of the live circuit along with the hot wire.
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.
A little hard to read, but the left side says "hot wire" and the right side says "white wire". We'll put the black wires on the hot side and the white wires on the left side. First connect the ground wire to the green screw at the bottom of the outlet.
A high quality pair of sunglasses may include polarized lenses. A polarized lens offers the following advantages over non-polarized lenses: Increases visual comfort. Since your eyes aren't constantly challenged by glare, it is easier to view objects in bright conditions.
That being said, most polarized lenses also offer adequate UV protection. Again, if you are in doubt, have your sunglasses checked by an optometrist. False: Just like lens tint, lens color has nothing to do with protecting your eyes from UV rays.
Both polarized lenses and anti-reflective coating cut reflected glare. Anti-reflecting coatings reduce glare caused by light reflecting off the back surface of your sunglass lenses. Mirror-coated lenses limit the amount of light entering your eyes, so you're more comfortable.