Insulated Type J Thermocouple Grade Wire (Information)

Wire J JX m

Type J Insulated Wire Color Code: Positive, White (Iron); Negative, Red, (Constantan); Overall Brown White Tracer, Extension Grade has Black outer Jacket. Single, Duplex, Cable or Bare.

Type J Insulated Wire  Color Code: Positive, White (Iron);  Negative, Red, (Constantan); Overall Brown, White Tracer; Extension Grade has Overall Black 

Product Specifications



Solid or stranded thermocouple or extension grade wire per
ASTM E230 & ANSI MC96.1


 12 Types Available


Parallel  or twisted conductors

Operating Temperature:

32ºF to 1600ºF ( Dependent on AWG)

Limits of Error

Conforms to ASTM E230, IEC 584
and ANSI MC 96.1

Color Code:

Conforms to ASTM E230 and ANSI MC
96.1 (International Color Codes Available)











  • Temperature Sensors
  • Single Conductors, Duplex or Cable
  • Power Plants
  • Metal Overbraids
  • Transportation
  • Twisted/Shielded Pair
  • Cryogenics
  • Multi-Pair Cables
  • Petrochemical Plants
  • Galvanized Half-Oval Armor
  • FDA Approved...Applications
  • Insulation and Jacket
  • Composites
  • UL Listed Constructions
  • Aerospace
  • Calibration Test Reports
  • Foundries


  • Kilns



Related Products:
Type J Thermocouples
Type J, K, T, and E Industrial Thermocouples
Type B Thermocouples
Type K Thermocouples
Type N Thermocouples
Type R Thermocouples
Type S Thermocouples
Type T Thermocouples
Type E Thermocouples

Please visit Industrial Process and Sensor for more info.

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