Thermocouple Wire Code Standards

Color-codes have been adopted by various national and international standard agencies for identification of thermocouple wire and thermocouple products. In the United States, thermocouple grade wire normally has a brown overall jacket. For Types B, R, and S the color-codes relate to the compensating cable normally used.
 

Thermocouple Type	United States ANSI 96.1	United Kingdom BS1843	Germany 43714	France NF C42-323	Japan JIS C1610-1981
E	Purple + Purple - Red	Brown + Brown - Blue	Black + Red - Black		Purple + Red - White
J	Black + White - Red	Black + Yellow - Blue	Blue + Red - Blue	Black + Yellow -- Black	Yellow + Red - White
K	Yellow + Yellow -Red	Red + Brown - Blue	Green + Red - Green	Yellow + Yellow - Purple	Blue + Red - White
N	Orange + Orange - Red
B	Grey + Grey -Red		Grey + Red - Grey		Grey + Red - White
R	Green + Black - Red	Green + White - Blue			Black + Red - White
S	Green + Black - Red	Green + White - Blue	White + Red - White	Green + Yellow  - Green	Black + Red - White
T	Blue + Blue - Red	Blue + White - Blue	Brown + Red - Brown	Blue + Yellow - Blue	Brown + Red - White

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