The case color corresponds to the regional electric power distribution at 110/120 V = yellow, 230/240 V = blue, or 400 V = red. The most frequent connector is the red 3P+N+E, 6h (180deg) plug, which allows you to connect to the broad 400 V, three-phase power network that reaches many home locations. The other common types of plugs are the white 2P+N and the black 1P. These two last-mentioned types of connectors are used in locations where there is no risk of electric shock, such as offices.
In addition, there are two types of polarized plugs: the green PP-GE and the brown PR. The first type is for geographic areas where there is a high probability of getting electricity from foreign sources (such as from solar panels or wind turbines). The second type is for regions where there is a high probability of getting electricity from domestic sources but it can also be obtained from any other region's electricity grid (e.g., PJ-PL).
Finally, there are two types of adaptors: the white N1 and the black N2. The first type is for connecting lamps without an integral power supply to a domestic power network, while the second type is for connecting lamps with an integral power supply to a domestic power network.
In conclusion, the most common type of electrical outlet is the red 3P+N+E, 6h (180 deg) plug.
The United States has its own wiring colors for electrical circuits. For 208 VAC three-phase, black, red, and blue are used; for 480 VAC, brown, orange, and yellow are used. These colors are specified on all conductors that carry current.
Current flows in conductors called "hot wires". Hot wires are colored with black or red tape. Neutral wires are white or grey, while ground wires are green or metal. The term "third wire" is also used for the neutral line. It's not part of the hot line or ground line but it does get connected to the box or conduit sometimes called the "third slot" on the cable assembly.
In a home, each circuit must be labeled as to which boxes it will connect into. This means that if you're working with only one cable, you'll need to determine which color leads into which breaker panel. Then, when you run new cables into the wall, they should always use those colors. For example, if the original cable was black, then any new black cables should be connected to a black breaker panel hole. If there's a third wire in the panel, it may be used instead by specifying a gray or white conductor for the new cable.
Cables used within a house for lights, heat, air conditioners, etc. are usually all black or all red.
The wire insulation is color-coded to ensure proper connection... Plugs
|Earth||Green with yellow stripe|
To identify various power lines in different nations, fixed wiring electrical supply requires distinct wire color requirements (BS 7671). These colors are specified by the National Electrical Code.
The Canadian electrical system uses similar colors to those of the U.S. But there is one major difference: In Canada, it's legal to cross-wire objects with different voltage levels on the same set of conductors. So if you have a house built before 1979, there's a good chance that some of your cables were not properly separated during construction. This can cause problems if you try to use home wiring repair tools on items that contain different voltages! Before working on any household circuit, first check to make sure that you aren't about to damage any equipment by doing so. If you're unsure, call an electrician.
In Europe, cable types are usually distinguished by function rather than color. The most common type of cable is "hot" or "live", which means that it carries current from the breaker panel to the various outlets and appliances in the house. "Neutral" cables connect one side of a three-way switch to the other, and carry no current but do block voltage when the switch is turned off.
Colors of electrical cables To comply with regulatory standards, ixed wiring electricity delivery requires particular electrical cable colors (BS 7671). Cable colors are used to distinguish between various power lines in different nations and phases within three-phase power sources. The most common colors are black for hot wires, red for neutral wires, and white for ground wires. Other combinations are possible depending on national regulations.
The reason for this is that it's important for anyone who might be injured by any of the cables to know which one is which. If someone gets hurt by a hot wire they should not touch the other two cables because they may be damaged too.
This safety feature is required by law in some countries, such as Australia and Canada. In other countries all three cables must be able to carry current if needed, so they're always kept together.
It's also important when installing new wiring or replacing old wiring because people often connect them up wrong, which could cause an electric shock. By using different colors it makes it much easier to match up corresponding pairs of wires.
For example, if you were replacing old wiring and didn't have colored tape or something else to help identify wires, then they would all look the same. That's why it's important to use different colors so that nobody gets hurt by being connected up wrong.
Table of plug wiring colors in the United Kingdom
|Earth||Yellow and Green|
In the United States, color codes for AC power circuit wiring are used. Green or green with a yellow band serves as the protecting ground. The neutral wire is white, the hot (live or active) single phase wires are black, and the second active wire is red. Red, black, and blue three-phase lines provide power to industrial buildings and factories.
The voltage on each conductor within the cable must be the same for the cable to function properly. If there were differences in voltage between any two conductors, this would cause problems when trying to use both ends of the cable productively - for example, if one end was used for hot and the other for neutral, it would not work because there would be no way to connect them together safely. Cable with mismatched voltages is called "split power" cable - even though it's really just regular old wired cable with two different sets of wires inside!
Color coding makes these voltage differences obvious. If you were to lift up an outlet box or fuse panel cover, you would see that all of the outlets on a given circuit share a common set of cables, which go into the box/panel. These are called branch circuits. If a cable on a branch circuit has damage, the whole circuit will fail if the cable is not replaced. But since most branches carry only lighting or small appliances, losing their power is not much of a problem.