What Jim is trying to say is that because everyone has a different color code, you need to use an ohm meter or continuity tester to figure out what color wire goes to which pin on the cable that you have. It may depend on if they use the metric or US color code as well?
I do not think the color coding of cables is arbitrarily. If you look a telephoneman splicing hundreds of wires , they follow a color code scheme. Perhaps there is an ANSI standard they have standards for almost everythinng. If you are a telephone man, with a pair telephone cable, you'd better have a standard for what pair of wires goes where. If you're installing a 50 foot 8-wire cable between a PC and a Modem, you have a lot more lattitude. Or you could do DB9. It's amazing that it's as portable, and still works, as it is.
There IS a specification, but I really don't think it calls out wire colors. Even the tools and machines that are used are filled with wires that are used to conduct the electricity to perform whatever action is needed. While electricity is used constantly throughout the day without much thought, it actually has the potential to cause many issues. If something is not wired properly, it can result in injuries, deaths, fires, and many other problems.
This is why there are well-established wire color codes to ensure those working with an around this type of equipment can ensure everything is wired safely and effectively. There are quite a few different wire color code standards in place, so it is important to understand which one to follow in which situation. The standards used will vary based on what country the wiring is being done in, and the type electricity it is for, and other factors.
Learning about the different options that may be used in a given situation is essential for workplace safety. When wiring for DC power , there are typically going to be either two or three wires. The coloring is as follows:.
AC power comes in many different types based on how many volts the wires will be carrying. For wires that will be , or volts, the following wiring color standards are used. It is important to note that with this type of wiring, there are multiple phases in place, each of which will get its own color wire to make it clear what it is for those working on it. In some uncommon situations, one phase will have a higher voltage than the others. These are known as high-leg connections.
While rare, they can be identified by looking for a wire that is marked with orange, which will be the higher voltage wire. These high-voltage connections are quite common in many manufacturing and other industrial areas. Due to the serious potential for deadly electrocution or other issues, getting these color codes right is essential. These are the wire color coding standards that are used in the United States.
In Europe and other countries, there are different standards in place. In most cases, a machine made overseas for use in America will be wired according to US color standards. Taking the time to confirm this is the case before using the machinery is always a smart safety step. Another important thing to keep in mind when looking at the safety of electrical wires is the data wiring in a facility. Cables that are used to transmit data for computer systems are often thought to be harmless since they are carrying information rather than electricity.
Some types of networking cables will have enough electricity flowing through them to cause a hazard. Certain devices, such as phones, will just need the 'power over Ethernet' which means they get the electricity that is needed from the network cable they are connected to. If someone cuts into these wires, or they become frayed, they can present a risk of shock or fire.
Data cables are typically colored based on the needs and standards of the facility rather than the electrical standards due to the lower voltages. Applying labels or warning signs near these types of cables can serve as a good reminder of the potential risk of shock. The wire color codes used are only going to apply to the actual wires that are carrying the electricity.
In many cases, a bundle of these colored wires will be grouped together, and sealed within a black or grey cable. This helps to protect people from accidental exposure, and makes it much easier to run the wiring where it needs to go, especially for higher voltage situations.
When this is the case, it is important to take the time to properly label the wires and electrical conduits to warn people of potential dangers.
Is there a universal color code for this? At minimum, for two-way serial communication you need just three pins:. Note that sometimes particular serial cables are wired in non-standard way, but this is very rare. Indeed, there is a number of possible serial connectors. The particular cable you have connects the six most popular lines. Cables that connect only some of the DB-9 serial lines are widely available , though do not assume that the same six pins are connected on all DB-9 cables.
Depending on your needs, the six connected pins may or may not be sufficient. For most modern needs if "modern" can be used to apply to serial port in six wires is sufficient. Unfortunately, there is no standard for color coding serial lines. The only way to know which color is connect to what pin is to test with a multimeter. Assuming your connector is for RS notice that a DB9 may be used for other interfaces too there are pins that aren't used in some cases.
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