The issue with the colors of the instrument wires
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Dear masters, I’m a layperson. Is it possible to connect the dual-line instruments to the control room without regard to the order of the wires? In other words, is it acceptable to use two wires of the same color? Thank you all; please ask the masters for help.
Sure, but you need to print the wire number clearly (on the number tag). After connecting the wires, just check them
Good cables not only have different colors for each core, but also come with numbers for easy identification. Of poor quality; all the core wires are the same color. There are no specified requirements for colors.
Actually, color isn’t the most important thing; what matters is the number. However, different colors are usually used, as speed is key – it should be possible to tell the difference at a glance
In fact, there are standards for cable colors. As mentioned on the 3rd floor, many low-quality cables come in just one color. As for the cable you use, its color isn’t that important; what’s crucial is to ensure proper labeling so that it’s easier to identify faults in the future!
Actually, the colors of the wires are there to help with differentiation and to prevent mistakes during wiring. Regarding the question you raised, it doesn’t matter which wire is used; what’s important is to connect the wires correctly, right?
When installing instruments in feed mills, the cables are of foreign origin. Among the multi-core cables, there is one yellow-green wire that is used for grounding; the design drawings specify that each cable must have one core dedicated to grounding. Apart from the grounding wire being red-green, the colors of the other wires are the same； When a three-core cable is used to connect three-phase electrical equipment, the three conductors of the cable are usually different colors ； Typically, the conductors of cables used for instruments are not colored; it is sufficient to label each conductor with its corresponding number and ensure that the wires are firmly connected to the terminals – color is not a critical factor.
DI nodes are all dry nodes, so there’s no need to specify the color of the wires, right?:lol
The main thing is to do proper marking and numbering. Cables with fewer conductors may be easier to distinguish by color, but when there are many conductors in a cable, relying on color alone is not sufficient.
Thank you all, masters. Then are there any instruments with two wires for which the wiring order is not required? For example, on the dashboard it is 1, 2 ； And can the access control card be 12 or 21?