A pink in commercial wiring is often a switch let that is positive when the circuit is closed. In advertising, neutral conductors are often white or gray. Pink is also a positive in automobile wiring. Negative wires are often black. In home wiring, the term "pink" can be used for either conductor type.
In the United States, electrical wiring uses two types of conductors: neutral and hot. The terms "neutral" and "hot" refer to the voltage potential between which they operate. Neutral conductors are always white or grey, while hot conductors can be any color you like as long as you know what's connected to them. If you're not sure which conductor is which, just follow the path of least resistance: if it's not hot then it has to be neutral.
In most homes, one terminal of a light bulb is connected to neutral, while the other is connected to earth (or ground). This prevents anyone from being shocked if they get their hands on an unoccupied lamp cord. The presence of earth in household wiring ensures that no current will flow through someone who has touched only one end of a cable. If they try to use this wire to send electricity into their body, they will be prevented from doing so by the action of earth.
If the multi-colored cable has black and red wires, the black wire is the negative wire and the red wire is the positive wire. If both wires are black with a white stripe, the striped wire is negative and the plain black wire is positive. To find out which wires in an automobile are negative, see the owner's handbook. The carpeting of a car does not need to be removed to determine this; it can be done visually.
All metal objects inside the engine compartment of a car should be kept free of any corrosion because if water gets into these areas it will find its way into the electrical system through the battery. This could cause serious damage to your vehicle's wiring system.
The term "neglect" applies to electrical systems too. If you leave your vehicle idle for hours at a time then leave the lights on overnight, this is neglect. This allows moisture to get into the wiring and cause problems such as short circuits or corrosion. Corrosion is when metals that are connected together oxidize and separate themselves from one another. This can be caused by water getting into an area where it shouldn't be. When exposed to air, water molecules will attach themselves to electrons found in the metal parts of your vehicle's electrical system and drain them away from they site. This leaves behind hydrogen ions which cause the metal to oxidize. If you allow moisture to get into your vehicle's electrical system then it will cause problems eventually.
The colors are as follows: Positive: The positive current wire is red. Negative: The negative current wire is black. Ground: If present, the ground wire will be white or grey.
As you point out, black is live, white is neutral, and green is ground in standard domestic wiring. But that's not necessarily the case everywhere in the world. For example, in Europe, red is usually used for live, black is used for neutral, and yellow for ground.
In America, the term "black" can be used for either voltage or current. In this case, it means the "off" position. The term "white" refers to power off, while "gray" refers to both voltage and current being off.
In Asia, where power utilities operate on 3-wire systems, the terms are similar to those used in America. Black means off, white means neutral, and gray means off. However, the term "ground" does not have its usual meaning as all metal objects in the vicinity of an electrical connection will conduct electricity to some degree. Instead, "ground" in Asia means the concrete foundation of a building, not the metallic part of the house wiring.
The presence of black cable doesn't mean that someone can come into your home and steal electricity from you.