General Specification GB 6995.1-86
1 Scope of Application
This standard is applicable to the identification marks of electrical equipment wires and cables, power cables, and communication cables, as well as the identification marks of insulation wires and cores.
2 Objective
This standard has made unified and standardized provisions for the identification marking methods of wires, cables and their insulated cores, in order to ensure the correct connection, installation and safe operation of wires and cables.
3 Definition
3.1 Cable Identification Markings
Mark the manufacturing factory, product trademark, model, specification, performance, etc. of the wire and cable with words, letters, symbols, colors, etc.
3.2 Identification Mark for Insulated Wire Cores
Use Arabic numerals and colors (single color or a combination of colors) to distinguish different insulated wire cores of multi-core cables or to indicate the functions of the insulated wire cores.
3.3 Standard Colors
The colors specified for the identification mark and represented by color swatches.
3.4 Color Order
For multi-core cables (with more than two cores), when identifying the insulation cores by color, the specified priority colors (including combined colors) and their sequential arrangement rules shall be followed.
4 General Requirements
4.1 Color Recognition
4.1.1 Color Requirements
The color of the logo should be able to confirm compliance with or be close to the color specified in GB 6995.2-86 "Identification Mark for Electrical Wires and Cables - Part 2: Standard Colors".
4.1.2 Clarity
The color of the logo should be easily recognizable or distinguishable.
4.1.3 Abrasion Resistance
The logo should be resistant to rubbing and the color after rubbing should remain basically unchanged.
4.2 Digital Recognition
4.2.1 Color Requirements
The carrier should be of the same color; the colors of all the identification numbers should be of the same color. The color of the carrier should be significantly different from the color of the logo, and it should be possible to confirm that it conforms to or is close to one of the colors specified in GB 6995.2-86.
4.2.2 Clarity
The digital logo should be clear and the text legible.
4.2.3 Abrasion Resistance
The digital logo should be resistant to rubbing. After being rubbed, the logo should remain unchanged.
4.3 Stamping Mark
4.3.1 Type
The embossed marks should be in the form of either raised or recessed printing and should be directly imprinted onto the carrier.
4.3.2 Clarity
The imprint of the logo should be clear or easily recognizable.
4.4 Marking Lines or Marking Bands
4.4.1 Marking Lines
The marking lines used for identifying the origin of electrical wires and cables should be registered in accordance with relevant regulations. Their colors can be a single color or a combination of colors.
4.4.2 Logo Band
A marking tape is a strip of tape with text, letters, symbols, etc. printed on it, indicating the manufacturer of the wire and cable, the voltage level, model, specification, trademark, etc.
4.4.3 Clarity
The colors throughout the entire marking line should be uniform. The boundary line between the two colors in the combined color should be clear. The color of the marking line and the markings on the sign tape should be clearly distinguishable.
4.4.4 Durability
When cleaning with gasoline or other suitable solvents, the color of the marking should remain unchanged.
5 Test Method
5.1 The clarity of the marking is inspected by visual means. When the surface of the sample is contaminated and cannot be identified, the sample surface can be wiped with a cotton fabric soaked in gasoline or other suitable solvents; or the cross-section of the sample can be cut with a clean blade for inspection.
5.2 To test the abrasion resistance of the logo, immerse a piece of absorbent cotton or cotton cloth in water, wipe it gently 10 times, and then inspect it with the naked eye.