MIL-DTL-5846D
TABLE V. Jacket color code for duplex thermocouple wires - Continued.
Metallic Composition
Color code
Overall
Tracers
Copper-constantan
Type I Solid or stranded conductors
Class C Solid conductors
Black
-
Class E Stranded conductors
Black
-
Chromel Alumel
Type I Solid or stranded conductors
White
-
Class C Solid conductors
Class E Stranded conductors
White
-
TABLE VI. Jacket color code for thermocouple extension wires.
Metallic Composition
Color code
Overall
Tracers
Iron-constantan
Type II Stranded conductors (8 ohms per
100 foot length)
Light Blue
-
Class A Each strand of iron wire
tinned. (120° C.)
Class B Each strand of iron wire tinned. Light Blue
1-Red
(230° C.)
Class C Iron wire not tinned.
Light Blue
1-White
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