MIL-STD-681F
TABLE I. Preferred color sequence for single wires - Continued. 1/ 2/
Base color |
First stripe or band |
Second stripe or band |
Third stripe or band |
Identification number |
White White White White White White White |
Yellow Yellow Yellow Green Green Green Blue |
Blue Blue Violet Blue Blue Violet Violet |
Violet Gray Gray Violet Gray Gray Gray |
9467 9468 9478 9567 9568 9578 9678 |
1/ For bundles composed of more than 139 wires, the above color designations shall be repeated in sequence with appropriate subgroupings to the extent necessary to provide identification of all conductors (see 5.1.3).
2/ The code designation "N" shall be applied to unpigmented clear or neutral insulations (see 4.6) to indicate nonstandard color coding. These insulations may be used only if the color of these insulations
do not fall within the requirements for the gray or the chromatic colors of MIL-STD-104.
TABLE II. Colors for chassis and interconnecting wiring system by function.
Function |
Base color |
Identifi- cation number |
Alternate color code (see 5.2.1) |
Alternate identifi- cation number |
Grounds, grounded elements 1/ 2/ Heaters or filaments Power supply, B+ 3/ Screen grids clock Cathodes and transistor emitters, high logic 4/ 5/ 6/ Control grids and transistor bases, low logic 5/ Anodes (plates) and transistor collectors, control 4/ 5/ 8/ Power supply, minus |
Green 2/ Brown Red Orange Yellow Black 7/ Blue Violet (purple) |
5 1 2 3 4 0 6 7 |
White/green 2/ White/brown White/red White/orange White/yellow White/black 7/ White/blue White/violet |
95 91 92 93 94 90 96 97 |
1/ Negative side of Hall generator control current.
2/ Inactive for new design. For new design, use green for base color (white/green for alternate), and identification number 5 (95 for alternate).
3/ Positive side of Hall generator control current.
4/ Applies to diodes, semiconductor elements, photoelectric cells, mercury-arc rectifiers, and other elements with operation similar to vacuum tubes and transistors.
5/ Applies to all types of gas tubes with operation similar to vacuum tubes.
6/ Negative side of Hall generator output voltage.
7/ Inactive for new design. For new design, use black for base color (white/black for alternate), and identification number 0 (90 for alternate).
8/ Positive side of Hall generator output voltage.
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