1. Flexible mineral insulation Fireproof cable Structure composition:
It is composed of copper conductor with high conductivity, inorganic magnesium oxide insulation and seamless copper tube sheath.
2. Working temperature of flexible mineral insulated fireproof cable:
Continuous operating temperature is 250℃； It can work close to the melting point of copper at 1083 ℃ for a short time or an extraordinary period (the melting point of magnesium oxide is 2800 ℃); The power supply can last for 3 hours at 950 ℃ - 1000 ℃.
3. Features of flexible mineral insulated fireproof cable:
（ 1) Fire resistance
Copper and magnesium oxide, two materials used in mineral insulated fireproof cables, are inorganic. This kind of cable will not burn, nor will it support combustion, so it can still continue to operate when it is close to the flame. Copper sheathed Melting at 1083 ℃, while magnesium oxide insulating material is solidified at 2800 ℃.
（ 2) High operating temperature
Flexible mineral insulated fireproof cable can withstand continuous operating temperature up to 250℃。 However, in an emergency, the cable can continue to operate for a short time at a temperature close to the melting point of the copper sheath.
（ 3) Long life
Inorganic materials used in flexible mineral insulated fireproof cables can ensure stability, long service life and fire resistance of cables.
（ 4) Explosion proof
The highly compacted insulating material in the flexible mineral insulated fireproof cable can prevent steam, gas and flame from passing between the equipment parts connected to the cable.
（ 5) Small outer diameter
The diameter of flexible mineral insulated fireproof cable is smaller than that of other cables with the same rated current.
（ 6) Waterproof
If the flexible mineral insulated fireproof cable is completely immersed in water, the mineral insulated fireproof cable can continue to operate with its seamless metal sheath.
（ 7) High mechanical strength
Flexible mineral insulated fireproof cable is durable and can withstand severe mechanical damage without damaging its electrical performance.
（ 8) Large current carrying capacity
For cables with the same cross section, mineral insulated fireproof cables transmit higher current than other types of cables. At the same time, mineral insulated fireproof cable can also withstand considerable overload.
（ 9) Short circuit fault rating
At the same temperature, the short circuit fault rating of flexible mineral insulated fireproof cables is significantly higher than that of other types of cables.
（ 10) Grounding
For flexible mineral insulated fireproof cable, independent grounding conductor is unnecessary, because the copper sheath used in this cable has played the role of grounding conductor and can provide excellent low grounding resistance. Local grounding sheath circuit（ ESR) wiring, the outer copper sheath can be used as grounding and neutral conductor in the MEN (multi grounded neutral) system.
（ 11) High corrosion resistance
The copper sheath of flexible mineral insulated fireproof cable has high corrosion resistance. For most devices, it does not need to take additional protective measures. Where the copper sheath of the cable is prone to chemical corrosion or serious industrial pollution, the mineral insulated fireproof cable shall be protected with a plastic outer sheath.
