Thermocouple NEC

[wireday]

Is there a code section pertaining to TC's. I realize the the TC conductors need to be in separate conduits, They must be allowed in the same control box, Do I need a certain rated TC wire if its around the 120v controller in my control box? I need to run from control box out to point of contact on machine. I would like to read up and understand better.Do they make 600volt rated TC wire?

 

[tortuga]

You can buy 18AWG type MTW rated for 600V:
https://www.encorewire.com/wp-content/uploads/EncoreWire-MTW_AWM_TEW.pdf
also TFN building wire.
You might classify it as a class 1 circuit under 725.41(B) or 725.130(A) Exception 2
A thermocoupple is mentioned under 725.121 (A) Exception 1 as not needing to be listed as a class 2 power source.
Hope this helps.

 

[don_resqcapt19]

I would never consider running TC conductors or cables with power wiring no matter what the insulation rating of the cable may be. The termocouple single is very sensitive to induced voltages and currents.