MIL-DTL-5846D
TABLE VI. Jacket color code for thermocouple extension wires Continued.
Metallic Composition
Color code
Overall
Tracers
Type IV Stranded conductors (20 gage
copper, 16 cage constantan)
Class A (120° C.)
Black
1-Red
Class B (230° C.)
Black
2-Red
Type IV Stranded conductors (18 cage
copper, 14 cage constantan)
Class A (120° C.)
Black
1-Yellow
1-Green
Class B (230 C.)
Black
1-Yellow
2-Green
Chromel-alumel
Type II Stranded conductors (7 ohms per
25 foot length)
Class A - (315° C.)
White
1-Green
Type III Stranded conductors (7 ohms per
50 foot length)
Class A - (315° C.)
White
2-Green
Type IV Stranded conductors (7 ohms
per 100 foot length)
Class A - (315° C.)
White
3-Green
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