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Colour Codes for Thermocouple Extension and Compensating Cables

   
Codes/Conductor
combinations
Characteristics of various
standards of Extension
and Compensating Cables 		Colour code for Thermocouple Extension 
and Compensating Cables
  British Standard
BS 1843 		American Standard
ANSI MC 96.1 		Indian Standard
IS 8784 		International
Electro Technical
Commission

Code

Conductor
Combinations 		IEC 584-3
+ VE Leg - VE Leg
KX Nickel
Chromium 		Nickel
Aluminium 		+/-
2.5°C 		+/-
2.2°C 		+/-
2.2°C 		+/-
2.5°C
VX Copper Copper-
Nickel 		+/-
2.5°C 		- - - - +/-
2.5°C
TX Copper Copper-
Nickel 		+/-
1.0°C 		+/-
1.0°C 		+/-
1.0°C 		+/-
1.0°C
JX IRON Copper-
Nickel 		+/-
2.5°C 		+/-
2.2°C 		+/-
2.2°C		 +/-
2.5°C
EX Nickel
Chromium		 Copper-
Nickel 		+/-
2.5°C 		+/-
1.7°C 		+/-
1.7°C 		+/-
2.5°C
RX Copper Copper-
Alloy 		+/-
2.5°C		 +/-
1.5°C 		+/-
1.5°C 		- -
SX Copper Copper-
Alloy		 +/-
2.5°C		 +/-
1.5°C 		+/-
1.5°C 		+/-
2.5°C
BX Copper Copper-
Alloy 		- - +/-
0.5°C 		+/-
0.5°C 		- -
 
     
   

Loop Resistance for Thermocouple Conductors
   
LOOP RESISTANCE (MAX) FOR THERMOCOUPLE CONDUCTORS at 20ºC OHM / Km.
THERMOCOUPLE   TYPE KX VX TX JX EX RX/SX

  20  AWG  Conductor

1910 980 980 1214 2312 280
  18  AWG  Conductor 1212 624 624 772 1470 175
16  AWG  Conductor 746 385 385 475 905 110
 
     
   
 
   
     
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