Extension Grade-1.38mm Kpx/Knx Type
Thermocouple Grade Wire
| ANSI Type | Grade or Generic Trade Names* | Single Conductors | Magnetic | Conductor Color Code | Overall Color Code** |
| E | Chromel Constantan | EP EN | No No | Purple Red | Brown w/ Purple Tracer |
| J | Iron Constantan | JP JN | Yes No | White Red | Brown w/ White Tracer |
| K | Chromel Alumel | KP KN | No Yes | Yellow Red | Brown w/ Yellow Tracer |
| T | Copper Constantan | TP TN | No No | Blue Red | Brown w/ Blue Tracer |
Extension Grade Wire
| ANSI Type | Grade or Generic Trade Names* | Single Conductors | Magnetic | Conductor Color Code | Overall Color Code** |
| EX | Chromel Constantan | EPX ENX | No No | Purple Red | Purple |
| JX | Iron Constantan | JPX JNX | Yes No | White Red | Black |
| KX | Chromel Alumel | KPX KNX | No Yes | Yellow Red | Yellow |
| TX | Copper Constantan | TPX TNX | No No | Blue Red | Blue |
| RX | Copper Alloy #11 | RPX RNX | No No | Black Red | Green |
| SX | Copper Alloy #11 | SPX SNX | No No | Black Red | Green |
| BX | Copper Copper | BPX BNX | No No | Gray Red | Gray |
| W325X*** | Alloy 203 Alloy 225 | W3FX W25NX | No Yes | Orange Red | Orange w/ Black Tracer |
| WS26X | Alloy 405 Alloy 426 | WSPX W26NX | Yes Yes | Orange Red | Orange |
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