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Thermocouple Standards and Color Codes

 

United States and International Color Coding

Standard ANSI color coding (United States) is used on all insulated thermocouple wire and extension wire when type of insulation permits. In color coding, Watlow Gordon reserves the right to include a tracer to identify the ANSI type. 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. Additionally, various national and international standard agencies have adapted color codes for the identification of thermocouple wire and products. These generally differ from those used by ANSI.
 

International Standards

Country

National Standard

Calibrations

USA
Germany
Japan
United Kingdom
France
ANSI MC96-1-82
DIN 43710
JIS C1602
BS 4937
NF C42-321
E, J, K, T
E, J, K, T
E, J, K, T
E, J, K, T
E, J, K, T
Italy
IEC
CTI-UNI 7938
584-1:1977
E, J, K, T
E, J, K, T


Thermocouple and Extension Wire Color Codes

Overall/Positive (+)/Negative (-)
T/C Type ANSI MC96.1 T/C ANSI MC96.1 Extension UK BS 1843 Germany DIN 43714 Japan JIS C1610-1981 France NF C42-323
B(overall)
BP
BN
---
---
---
Grey
+Grey
-Red
---
---
---
Grey
+Red
-Grey
Grey
+Red
-White
---
---
---
E(overall)
EP
EN
Brown
+Purple
-Red
Purple
+Purple
-Red
Brown
+Brown
-Blue
Black
+Red
-Black
Purple
+Red
-White
---
---
---
J(overall)
JP
JN
Brown
+White
-Red
Black
+White
-Red
Black
+Yellow
-Blue
Blue
+Red
-Blue
Yellow
+Red
-White
Black
+Yellow
-Black
K(overall)
KP
KN
Brown
+Yellow
-Red
Yellow
+Yellow
-Red
Red
+Brown
-Blue
Green
+Red
-Green
Blue
+Red
-White
Yellow
+Yellow
-Purple
N(overall)
NP
NN
Brown
+Orange
-Red
Orange
+Orange
-Red
---
---
---
---
---
---
---
---
---
---
---
---
R(overall)
RP
RN
---
---
---
Green
+Black
-Red
Green
+White
-Blue
---
---
---
Black
+Red
-White
---
---
---
S(overall)
SP
SN
---
---
---
Green
+Black
-Red
Green
+White
-Blue
White
+Red
-White
Black
+Red
-White
Green
+Yellow
-Green
T(overall)
TP
TN
Brown
+Blue
-Red
Blue
+Blue
-Red
Blue
+White
-Blue
Brown
+Red
-Brown
Brown
+Red
-White
Blue
+Yellow
-Blue
 

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