Wire
Insulation Identification and Application Guide
Insulation Code |
Insulation Type | Appearance | Insulation Temperature Range* | Abrasion Resistance | Flexibility | Water Submersion | |
Overall | Conductors | ||||||
PP
(Extension Grade-EXPP) |
Polyvinyl
Chloride (PVC)
|
Polyvinyl
Chloride (PVC)
|
-40
to 105°C
(-40 to 221°F) |
Good
|
Excellent
|
Good
|
|
FF
(Extension Grade-EXFF) |
FEP
Teflon or Neoflon |
FEP
Teflon or Neoflon |
-200
to 200°C
392°F) |
Excellent
|
Good
|
Excellent
|
|
TT
(Extension Grade-EXTT) |
PFA
Teflon or Neoflon |
PFA
Teflon or Neoflon |
-267
to 260°C
500°F) |
Excellent
|
Good
|
Excellent
|
|
|
Kapton |
Kapton |
-267
to 316°C |
Excellent |
Good |
Good |
|
|
Glass Braid |
PFA
|
-73
to 260°C |
Good |
Good |
Excellent |
|
GG |
Glass Braid |
Glass Braid |
-73
to 482°C |
Poor |
Good |
Poor |
|
HH |
High
Temp |
High
Temp |
-73
to 704°C |
Poor |
Good |
Poor |
|
XR |
Refrasil Braid |
Refrasil Braid |
73
to 871°C |
Poor |
Good |
Poor |
|
XC |
Nextel Braid |
Nextel Braid |
-17
to 1204°C |
Fair |
Good |
Poor |
Insulation
Code |
Resistance
To:
|
Comments
|
||||
Solvent
|
Acid
|
Base
|
Flame
|
Humidity
|
||
PP
(Extension Grade- EXPP) |
Fair
|
Good
|
Good
|
Good
|
Good
|
Colour
Coded PVC Extruded Over Each Bare Wire. PVC Applied Over Insulated
Primaries. Affected by Ketones, Esters
|
FF
(Extension Grade- EXFF) |
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Colour
Coded FEP Extruded Over Each Bare Wire. FEP Jacket Extruded Over
Insulated Primaries, Superior Abrasion and Moisture Resistance.
Same Basic Characteristics as PFA but Lower Temperature Rating
|
TT
(Extension Grade- EXTT) |
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Colour
Coded FEP Extruded Over Each Bare Wire. PFA Jacket Extruded Over
Insulated Primaries, Superior Abrasion and Moisture Resistance.
Same Basic Characteristics as FEP but Higher Temperature Rating
|
|
Good |
Good |
Good |
Good |
Excellent |
Fused Kapton Tape Approx. 0.15 mm Applied to Conductors. A 0.10 mm Jacket is Then Applied to Both. Excellent Moisture and Abrasion Resistance, High Dielectric Strength (7 kV/mil) Retains Much Physical Integrity After Gamma Radiation. FEP is Used as Adhesive Binding Agent [Melts at Approx. 260°C (500°F)] |
|
Excellent |
Excellent |
Excellent |
Excellent |
Excellent |
PFA
Extruded Over Each Bare Wire 0.12 mm Silicon Impregnated |
GG
|
Excellent |
Excellent |
Excellent |
Excellent |
Fair |
0.12 mm Glass Yarn Braided Over Each Conductor, Impregnated with Silicon Varnish, Then Covered Together with 0.12 mm Glass Braid. Varnish Improves Moisture and Abrasion Resistance, but is Destroyed Above 204°C (400°F). |
HH |
Excellent |
Excellent |
Excellent |
Excellent |
Fair |
High
Temp. Glass Braid Over Each Conductor, and Binder Impregnated.
Overall High Temp Glass Braid Applied and Bindered. Binder Improves
Moisture and Abrasion Resistance But is Destroyed |
XR |
Excellent |
Good
to |
Good
to |
Excellent |
Poor |
Braid
of Vitreous Silica Fibre Applied to Each Bare Wire. Then Over
Both. Suitable to 982°C (1800°F) if Not Subjected to |
XC |
Excellent |
Good |
Good |
Excellent |
Fair |
High Temp. Alumina-Boria-Silica Ceramic Fibre Braided Over Each Conductor Then Over Both. Not Recommended for Platinum Thermocouples or Exposure to Molten Tin and Copper, Hydrofluoric or Phosphoric Acids, or Strong Alkalies. |
|
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