High Temperature Cable Fire-Resistant Mica Glass Cable

Engineering-Grade Mica Cable – Built for Thermal Stress and Fire Safety

When equipment operates at extreme temperatures, wiring becomes the weakest link. Our mica-based high-temperature cable addresses this challenge directly. Using a multi-layer insulation system that combines compressed mica tape with a tightly woven fiberglass outer sheath, this wire maintains stable electrical performance even when surface temperatures soar past 450°C.

Unlike conventional heat-resistant wires that rely on synthetic polymers, this cable uses inorganic mica – a naturally occurring silicate mineral with exceptional dielectric strength and a melting point above 1000°C. This makes it an ideal choice for environments where fire risk, toxic smoke, or insulation breakdown cannot be tolerated.

Core Construction – Layer by Layer

• Conductor core: Stranded construction using either bare copper, hot-dip nickel-plated copper, or solid pure nickel. The nickel-plated option is our best-seller for 400–500°C work, as the plating effectively prevents surface scaling that commonly ruins standard copper in cyclic heating.

• Primary insulation: High-purity phlogopite or muscovite mica tape wrapped helically around the conductor with a 25% overlap. This wrapping technique ensures complete coverage and maintains dielectric integrity even if the outer jacket suffers mechanical damage.

• Outer mechanical protection: A braided fiberglass sleeve impregnated with a heat-set varnish. This layer resists abrasion against metal edges, protects the mica from moisture ingress during storage, and adds a clean, finished appearance.

Where This Cable Proves Its Value

Our customers typically install this wire in three main categories of equipment:

• Thermal processing units: Industrial ovens, autoclaves, curing presses, and ceramic kilns where thermocouple and power leads must endure repeated door-opening cycles.

• Food service and kitchen appliances: Commercial toasters, pizza deck ovens, broilers, and rice warmers – applications subject to health and safety inspections that strictly limit PVC use.

• Energy and conversion systems: Generator windings, transformer leads, battery interconnects in high-ambient spaces, and solar thermal collector junctions.

• Specialty vehicles and marine: Engine-room cabling on ships, auxiliary heater wiring in railcars, and de-icing systems for aircraft nacelles.

Availability and Customization

We maintain stock in AWG sizes 26 through 4, in spool lengths of 100 ft, 500 ft, and 1000 ft. Custom colour-coded stripes, non-standard voltages, or parallel-conductor configurations are available for OEMs with minimum order quantities. If you are replacing an existing cable from a competitor, send us your current part number – we can cross-reference it and suggest a direct matching alternative within 24 hours.

Installation and Termination Tips

Because mica tape can be brittle under sharp stress, we recommend stripping the fiberglass braid using a thermal stripper rather than mechanical blades to avoid nicking the mica layer. For terminations, use nickel-plated ring or spade terminals and torque them to standard values – over-tightening can crush the insulation and reduce the creepage distance. When running long lengths, support the cable every 300 mm to prevent sagging under its own weight at high temperatures.

Contact us today for bulk pricing, custom lengths, and fast shipping.