The color table of thermocouple cable
 

Cables often have different color encoding systems. The insulation layer of the cable is generally coded in the order of phase, grounding and neutral points to facilitate identification. See the color table of the cable below to help determine the correct cable. This is especially useful to complete the existing cable, so you can distinguish the existing and new ones and ensure that the correct connection is made. The instrument cannot be connected correctly, which may cause incorrect reading during temperature measurement.