TC and Extension Wire Insulation Types
†Thermocouple extension grade wire is only calibrated up to 400°F (204°C).
| Image | Single Conductor | Duplex Conductors | Temperature Rating† | ANSI Color Coded | Physical Properties | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Insulation | Impregnation | Insulation | Impregnation | Continuous | Single Reading | Abrasion Resist. | Moisture Resist. | Chemical Resist. | ||
| Glass Braid | Silicone Modified Resin (retained to 400°F [204°C]) | Glass Braid | Silicone Modified Resin (retained to 400°F [204°C]) | 900°F (482°C) | 1000°F (538°C) | Yes | Fair | Good | Good |
| Double Glass Wrap | Silicone Modified Resin (retained to 400°F [204°C]) | Glass Braid | Silicone Modified Resin (retained to 400°F [204°C]) | 900°F (482°C) | 1000°F (538°C) | Yes | Fair | Good | Good |
| High Temp Glass Braid | High Temp Varnish (retained to 400°F [204°C]) | High Temp Glass Braid | High Temp Varnish | 1300°F (704°C) | 1600°F (871°C) | Yes | Good | Fair | Good |
| Polyvinyl (PVC) | — | Polyvinyl (PVC) | — | -20 to +221°F (-29 to 105°C) | 221°F (105°C) | Yes | Good | Excellent | Good |
| FEP Extr. | — | FEP Extr. | — | 400°F (204°C) | 500°F (260°C) | Yes | Excellent | Excellent | Excellent |
| Kapton® | — | Kapton® | — | 500°F (260°C) | 800°F (427°C) | Yes (Indiv. only) | Excellent | Excellent | Excellent |
| Polyvinyl (PVC) | — | Polyvinyl (PVC) Twisted | — | -20 to +221°F (-29 to +105°C) | 221°F (105°C) | Yes | Good | Excellent | Good |
| Vitreous Silica Fiber | — | Vitreous Silica Fiber | — | 1600°F (871°C) | 2000°F( 1093°C) | No | Fair | Fair | Good |
|
| Ceramic Fiber | — | Ceramic Fiber | — | 2200°F (1204°C) | 2600°F (1427°C) | No | Good | Fair | Good |
