1) fire resistance:
Copper and magnesium oxide, two materials used for mineral insulated cables, are inorganic substances. This kind of cable will not burn, nor will it help combustion, and it can continue to work under the condition close to the flame. The copper sheath melts at 1083℃, and the magnesium oxide insulation material cures at 2800℃.
2) High working temperature
Mineral insulated cables can withstand continuous operating temperatures as high as 250℃. However, in an emergency, the cable can continue to run for a short time at a temperature close to the melting point of the copper sheath.
3) Long service life
Mineral insulated cables are made of inorganic materials, which can ensure the stability, long life and fire resistance of cables.
4) Blast resistance
The highly compacted insulating material in mineral insulated cables can prevent steam, gas and flame from passing between equipment parts connected to the cables.
5) Small outer diameter
The diameter of mineral insulated cable is smaller than other cables with the same rated current.
6) Waterproof
If the mineral insulated cable is completely submerged in water, it can continue to work with its seamless metal sheath.
7) High mechanical strength
Mineral insulated cables are durable and can withstand serious mechanical damage without damaging their electrical properties.
8) Large bearing capacity
For cables with the same cross section, mineral insulated cables transmit higher current than other types of cables. At the same time, mineral insulated cables can also withstand considerable overload.
9) Short circuit fault rating
At the same temperature, the short-circuit failure rate of mineral insulated cables is obviously higher than that of other types of cables.
10) grounding
For mineral insulated cables, there is no need for an independent grounding conductor, because the copper sheath used in this cable has already played the role of grounding conductor, which can provide excellent low grounding resistance. As far as grounding sheath loop (ESR) wiring is concerned, in MEN (Multi-grounding Neutral) system, external copper sheath can be used as grounding and neutral conductor.
1 1) has high corrosion resistance.
The copper sheath of mineral insulated cable has high corrosion resistance, and for most equipment, no additional protective measures are needed. In places where the copper sheath of cable is easy to be corroded by chemicals or seriously polluted by industry, mineral insulated cable should be protected by plastic outer sheath.