Thermocouple Cable: Thermocouple Wire Diameter, Resistance Table

Thermocouple Cable: Thermocouple Wire Diameter, Resistance Table

Table IV. Lists, by AWG size, the diameters and resistance of the various types of thermocouple extension wires.

Table IV - Thermcouple Wire - Diameter and Resistance

AWG Diameter, Inches
(Single
Conductor) Iron/Constantan
Type J-JX
Ohms* Chromel®/Alumel®
Type K-KK
Ohms* Copper/Constantan
Type T-TX
Ohms* Chromel®/Constanta
Type E-EX
Ohms* Copper/Alloy#11
Type SX, RX
Ohms*

14 .064 8.9 14.7 7.4 17.6 4.4

16 .050 14.1 23.2 11.7 27.7 6.9

18 .040 22.9 37.7 19.0 45.0 11.2

20 .032 35.7 58.8 29.7 70.2 17.5

24 .020 90.5 148.8 75.4 177.8 45.0

28 .012 229.7 359.0 120.0 433.0 107.0

30 .010. 365.0 602. 294.0 719.0 180.0

*Ohms per 100 Double Feet at 20ºC
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AWG	Diameter, Inches (Single Conductor)	Iron/Constantan Type J-JX Ohms*	Chromel®/Alumel® Type K-KK Ohms*	Copper/Constantan Type T-TX Ohms*	Chromel®/Constanta Type E-EX Ohms*	Copper/Alloy#11 Type SX, RX Ohms*
14	.064	8.9	14.7	7.4	17.6	4.4
16	.050	14.1	23.2	11.7	27.7	6.9
18	.040	22.9	37.7	19.0	45.0	11.2
20	.032	35.7	58.8	29.7	70.2	17.5
24	.020	90.5	148.8	75.4	177.8	45.0
28	.012	229.7	359.0	120.0	433.0	107.0
30	.010.	365.0	602.	294.0	719.0	180.0