ANSI Color Code for Thermocouple and Thermocouple Extension Wire
ANSI Symbol	Wire Alloys	Polarity	Thermocouple Wire Color		T/C Extension Wire Color
			Individual	Jacket	Individual	Jacket
J	Iron Constantan(TM)	+JP -JN	White Red	Brown	White Red	Black
K	CHROMEL®* ALUMEL®*	+KP -KN	Yellow Red	Brown	Yellow Red	Yellow
T	Copper Constantan(TM)	+TP -TN	Blue Red	Brown	Blue Red	Blue
E	CHROMEL®* Constantan(TM)	+EP -EN	Purple Red	Brown	Purple Red	Purple
N	Nicrosil(TM) Nisil(TM)	+NP -NN	Orange Red	Brown	Orange Red	Orange
RSX	Copper Copper Alloy	+RSP -RSN	-	-	Black Red	Green
BX	PCLW630/Copper Copper	+BP -BN	-	-	Grey Red	Grey
W3X W5X	Alloy 203; Alloy 405 Alloy 225; Alloy 426	+WP -WN	-	-	White/Red Red	White/Red

* CHROMEL® and ALUMEL® are registered rademarks of Hoskins Manufacturing Company. PMC Corporation reserves the right to substitute equivalent product to CHROMEL® and ALUMEL® at any time. For additional information see Bare Wire Data Sheet