An overview of popular Custom Cable materials (in descending order of upper temperature rating)


MICC Instrumentation Cables

MI Cable is manufactured from completely inorganic materials. Available in Pure Nickel (Nickel 200) or 27% Nickel Clad Copper conductors. The metallic sheath materials for instrumentation range from Stainless steel (least expensive) to Inconel, Nickel 200, alloy 825 and many others. The insulation is a compressed magnesium oxide powder, with an operating limit equal to the point of melting copper (1982°F-1083°C). Applications include: power cable for use on heaters or boilers, tanks and furnace wiring, metal smelters, lumber kilns, and critical circuits where extreme high temperature wire has to be replaced regularly or cable is expected to survive and provide circuit integrity in a fire situation.  By their nature, MI cables  tend to be inflexible and require to be "dressed" into position as one would a copper water pipe.

Temperature Rating 1000° C / 1832° F


Nextel (Ceramic Braid) thermocouple wire

Nextel 312, is an Alumina-Borica-Silica fibre, which is braided directly onto thermocouple alloy; this insulation retains strength and flexibility at a continuous exposure to 1200°C, and short term exposure to 1425°C (2600°F). Most common metals (except molten tin and copper) do not attack the fibres. Furthermore, due to the fact that Nextel 312 Ceramic fibres contain no residual acids or chlorides, corroding and etching is eliminated. This particular product will outgas on first heat up. The first firing should be in air to oxidize out the sizing and lubricants etc., used to hold the yarn together and facilitate the spooling and braiding process. Once fired to the "use" temperature, it should be OK for vacuum or protection tubes; although, it is not recommended for use in abrasive environments, without the protection of Nickel or Inconel® overbraid.

Temperature Rating 1200° C / 2200° F


Vitreous Silica Fibre Insulated

Vitreous Aluminosilicate fibres are a family of high temperature fibres, designed to be used in a variety of industrial and commercial applications. Manufactured from alumina-silica materials, these fibres offer such characteristics as- high temperature stability, low thermal conductivity, low heat storage, excellent thermal shock resistance, light weight, and superior corrosion resistance. Not recommended for abrasive applications at high temperatures.

Temperature Rating 980° C / 1800° F


Fibreglass Insulated and Served thermocouple

Fibreglass insulated thermocouple wire, is low cost, high temperature wire. The glass braid serves as a flexible insulator for the thermocouple conductors, which are then impregnated with a heat and moisture resisting finish, thereby promoting fibre bonding, reducing fraying and providing ANSI coding specifications for pigmentation and calibration.

Temperature Rating 704° C / 1300° F


Glass Served Fibreglass Jacketed thermocouple

Glass served/Fibreglass Jacket thermocouple wire is low cost, high temperature wire. The glass serving is an excellent insulator and is augmented with an overall fibreglass braid that is treated with a high temperature, moisture resisting finish. The glass serving allows more insulation to be used on the alloys when opposed to a glass braid dielectric. The entire assembly is color coded per ANSI specifications.

Temperature Rating: 510º C / 950º F


Mica / Glass Composites (MGT, MGS, MGR)

Mica is applied as a tape, providing the primary insulation and first line of defense against deterioration of critical circuits. Additionally, an overall glass braid is applied over the mica tape, to hold it in place, and to provide conductor coloration.  Much used as low voltage and instrumentation cables requiring specified Fire Resistance for the safe shutdown of process plant and equipment.

Temperature Rating 510° C / 950° F


Sintered Kapton® Dupont / Polyimide Tape

Kapton® is a tough polyimide film, exhibiting an excellent balance of physical, chemical, and electrical properties, over a wide temperature range, with superior dimensional stability at elevated temperatures. It is a very thin insulating material, allowing wire to be installed where space and weight are at a premium in applications like airframe and satellites.

Temperature Rating 260° C / 500° F


PTFE Taped

PTFE is the original cablemaking fluoropolymer. It provides outstanding mechanical, electro-chemical temperature and friction resisting characteristics. Furthermore, PTFE is a thermoset material, which will not melt or flow; this unfortunately also means that cable insulations are normally applied in an expensive taping operation and require "sintering" to seal the tape edges after application. Due to its outstanding dielectric properties less insulation is required in comparison to most other insulations (except Kapton®); typically about .005" for 30 AWG-18 AWG, permitting cable with a smaller overall diameter, to be used where space or the lack of space, is essential. Temperature ranges of this particular wire range from -70°C to +260°C.

Temperature Rating 260° C / 500° F


Extruded Teflon PFA® Dupont

Teflon® PFA, is a high-performance, melt extrudable, fluoropolymer resin, developed to extend the range of uses of PTFE fluorocarbons, by providing an easily extruded thermoplastic, with outstanding properties. PFA is especially useful to designers and end-users, who require a thermoplastic with excellent chemical stability, outstanding electrical properties, and mechanical strength for use in thin-wall, high and low temperature environments from -70°C to +260°C.

Temperature Rating 260° C / 500° F


Extruded Tefzel FEP® Dupont

FEP Teflon® is a high-performance fluoropolymer resin and was developed to extend the range of uses of the Teflon family by providing an easily extruded thermoplastic with outstanding properties. FEP is especially useful to designers and end-users who require a thermoplastic with excellent chemical stability, electrical properties, and mechanical strength for use in high and low temperature environments -70ºC - 200ºC.

Temperature Rating 200° C / 392° F


Fluorosilicone

Fluorosilicones cope well with temperature extremes and a wide range of chemicals. Fluorosilicone has a high resistance to flame, weather, oxidation, ozone; plus a better resistance to silicate hydraulic fluids, alkalis, alcohol and synthetic lubricants than ordinary silicone compounds.

Temperature Rating 200° C / 392° F


Extruded Tefzel ETFE® Dupont

Tefzel® insulated and jacketed cables offer a wide service temperature. Tefzel® insulated cables cost less than conventional PTFE/PFA insulated cables. Tefzel® ETFE meets the need for outstanding dielectric and mechanical properties for lightweight insulation in satellite cabling. Tefzel® retains high levels of strength, toughness and dielectric properties upon long-term exposure to radiation in the space environment.

Temperature Rating 150° C / 302° F


Silicone Rubber, Glass Braided

UL Recognized for use in electronic ignition or similar application in gas ranges or gas or fuel oil burner systems where protected from damage during handling, installation and servicing of the appliance. Silicone rubber is a very flexible, easily to terminate, relatively low cost, high temperature insulating material -80°C to +200°C (with glass overbraid) insulation. The silicone rubber compound is typically augmented with a braid for added abrasion resistance and increased flammability characteristics. Typical insulation thicknesses range from .020" to .045". Silicone rubber compounds are available which provide flame resistant insulation capable of passing Underwriters Laboratories vertical flame test VW-1, and the Mil-W-16878 specifications for flammability. Furthermore, silicone rubber compounds are fungus resistant, resistant to weathering, and because they are extremely stable and contains no sulphur, chlorine or other acid producing chemicals, do not not cause staining, corrosion or deterioration to other materials with which they come in contact ~ and have outstanding electrical characteristics.

Temperature Rating 150° C / 302° F


TPE

 

Outstanding flexibility and mechanical strength up to its continuous use temperatures of 150°C, with a flexible choice of processing options (tube extrusion and pressure die coating) makes TPE a popular the choice for wire and cable applications.  It has high temperature resistance: 3000 hrs at 160 °C for TPE U (peak temp up to 200°C) yet also exhibits excellent low temperature ductility and impact strength. Good copper stability (both TPE-E and U).

E and P grades provide extra fatigue resistance, good chemical and abrasion resistance and are popular for robotics and machine applications.

Temperature Rating 140° C / 284° F


XLPE

Polyethylene is one of the most widely used polymers for cable insulation and jacketing. Its excellent properties make it useful in many telecom and power applications. During the compounding process, additives can be introduced to improve resistance to ageing and to UV light, or to produce cellular insulation, thus improving the dielectric properties needed for some telecom applications. Polyethylene can also be cross-linked to improve its thermo-mechanical resistance for power applications. Low cost, chemically cross-linked polyethylene insulation, can be used for internal wiring of appliances. It is available in all colour, stripes, hash marks etc. UL listed fixture wire 18 AWG - 14 AWG.

Temperature Rating 125° C / 255° F


Dupont Hytrel TPE

Dupont's Hytrel thermoplastic polyester elastomer can meet multiple requirements. These include flex-fatigue resistance, flexibility at low temperatures, resistance to chemicals, to UV exposure and to impact; it is also a good electrical insulator, and has good processing characteristics that permit cost-effective manufacturing of thin wall extrusions for use in robotic applications.

 

Temperature Rating 105° C / 220° F


Polypropylene

Polypropylene brings attributes needed for many wire and cable applications, including high service temperature with good mechanical and electrical properties.

 

Temperature Rating 105° C / 220° F


High Temperature PVC

PVC (polyvinyl chloride) is an inexpensive thermoplastic material typically used in the process industries for thermocouple extension cables that are used outside the heat source area.  UL Listed as Power Limited Tray Cables (300V).

Temperature Rating 105° C / 220° F


Polyurethane

Polyurethane sheathed cables can be very flexible, have outstanding electrical performance, ageing characteristics, resistance to oils, and survive mechanical abuse. Polyurethane cables are popular for their wide ambient temperature range (-25°C to +80/110°C); UV, oil and water resistance; enhanced memory in curly cords, good abrasion resistance, retractability and strength.

Temperature Rating 80° C / 176° F


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