Mineral Insulated The mineral insulated heating cable (also named as MI cable) is designed to reach extremely high temperatures. MI cable is made by placing one or more copper rods inside a circular copper tube and filling the intervening spaces with dry magnesium oxide powder. The electrical mineral insulation heat tracing cable is equipped with metal sheath. The MI cable can reach temperatures up to 600鈩? Sanniu Electric Co.,Ltd provides MI cables with sheaths made of copper, copper-nickel and stainless steel for optional choice according to different needs, the metal sheath also physically protects the conductors, most importantly from accidental contact with other energised conductors. The MI cable system provides a simple solution to many difficult wiring problems and makes for a dependable and permanent installation for virtually all types of electrical circuits. Since MI cables use no organic material as insulation (except at the ends), compared with plastic-insulated cables, they are more resistant to fires, it can easily withstand high temperatures and heavy current overloads, does not emit smoke or toxic substances and allows no flame propagation, hence MI cables are used in critical fire protection applications such as fire pumps, alarm circuits and smoke control systems. Mineral insulated cable does not deteriorate at low temperatures and assemblies are unaffected by extreme changes in temperature. Furthermore, Magnesium oxide, the insulation in mineral insulated cable, provides superior radiation resistance over any other material and for this reason, MICC cable assemblies are an excellent choice for nuclear power plant applications. When in underground runs, the MI cable must be protected from physical damage. And there's a need for additional protection when the cable sees conditions that are destructive or corrosive to the copper sheath. The magnesium oxide insulation has a affinity for moisture, so the occasion for installation and operating should be kept dry and dehumidified. Moisture absorbed at a cut end of the cable better be driven off by heating the cable to keep it from electric leakage risk.Mineral Insulated website:http://www.heattracesn.com/electrical-heat-tracing/mineral-insulated/