What is mineral insulated cable used for                                          

At present, mineral insulated cables have been widely used in high-rise buildings, petrochemicals, airports, tunnels, ships, offshore oil platforms, aerospace, iron and steel metallurgy, shopping malls, parking lots and other occasions. Compared with ordinary cables, mineral insulated cables have better durability, reliability and fire resistance, mineral cable continuous working temperature of 250 ℃, in 950 ℃ - ℃ can continue to supply electricity for a hundred hours, short time or extraordinary period can be close to the melting point of copper ℃ work, applicable to the rated voltage of V below the line. And the micc cable carrying capacity of large, water, explosion-proof, corrosion-resistant, high working temperature, corrosion resistance, overload protection, so its life is also longer than normal cable! ZW is a leading mineral insulated cable manufacturers. We have more than 10 years on manufacturing  different mineral insulated cable sizes.

You can find more information on our web, so please take a look.

● No combustion, no support of combustion, no emission of toxic gases, zero combustion energy;

● Mineral insulated cable termination and intermediate connector are supplied with the cable, increasing the fire resistance reliability of the cable;

● Mineral cable can withstand extreme temperatures, falling objects and fire water spray in a fire;

● Micc cables can be used at high temperatures;

● Micc cable can be used at high temperatures;

● They are non-aging and are extremely stable;                                                                                         

● The metal sheath of the cable can be used as a grounding circuit;

●The metal jacket of the cable can be used as an earthing circuit;

● Due to the special structure of the cable, its load capacity is large;

● Excellent electromagnetic shielding and EMC performance;

● It can be protected against animal bites.

Advantage of Mineral Insulated Cables        

(1)Long service life: 100 years.

Inorganic materials used in mineral insulated cables can ensure the stability, long life and fire resistance of the cable.

(2) Small outer diameter: small cable diameter, easy to install, low comprehensive cost, cable without tube protection.

Mineral insulated cables have a smaller diameter than other cables with the same current rating.

(3) Short circuit fault rating

At the same temperature, the short-circuit fault rating of mineral insulated cables is significantly higher than that of other types of cables.

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(4) Explosion-proof: good performance in explosion-proof and excellent performance in nuclear radiation resistance.

The highly compacted insulation material in mineral insulated cables prevents the passage of vapors, gases and flames between the equipment parts connected to the cable.

(5) Large load capacity

For the same cable cross-section, mineral insulated cables transmit higher currents than other types of cables. At the same time, mineral insulated cables can also withstand considerable overload.

(6) high operating temperature: continuous operating temperature up to 250 ℃, short-term operating temperature up to ℃.

Mineral insulated cables can withstand continuous operation temperatures up to 250°C. However, in an emergency, the cable can continue to operate for a short period of time at a temperature close to the melting point of the copper jacket.

(7) Waterproof, moisture-proof, oil-resistant, corrosion-resistant

If the mineral insulated cable is completely immersed in water, the mineral insulated cable can continue to operate with the help of its seamless metal sheath.

(8) high mechanical strength: excellent mechanical strength, good bending performance, can be used in complex structures, space is limited installation environment.

Mineral insulated cables are strong and durable, and can withstand severe mechanical damage without compromising their electrical properties.

(9) High corrosion resistance

The copper sheathing of mineral insulated cables is highly resistant to corrosion, and for most installations, it does not require additional protective measures. Where the copper jacket of the cable is susceptible to chemical corrosion or heavy industrial contamination, a plastic outer jacket should be used to protect the mineral-insulated cable.

(10) Fire resistance: excellent fire resistance, reusable cable after a fire.

The two materials used in mineral insulated cables, copper and magnesium oxide, are inorganic. These cables do not burn, do not ignite, and can continue to operate in conditions close to a flame. The copper jacket is melted at ℃, while the magnesium oxide insulation material is cured at ℃.

(11)Grounding

For mineral insulated cables, a separate ground conductor is not required, as the copper jacket used for this cable already acts as a ground conductor and provides an excellent low ground resistance. For ground-sheath circuit wiring, the outer copper jacket is used as both ground and neutral conductor in multiple ground neutral systems.

Due to excellent characteristics of mineral insulated cables, more and more customers choose mineral cable according cable project. If you want to know mineral insulated cable price and micc cable price, please contact us. We promise to provide the qualified products for our customers.

Below id from the Pyrotenax website. Why for single conductor but not for multi? Thanks


A brass plate is not required for multiconductor cables. Connect the brass termination gland directly to the steel enclosure using lock nuts on either side of the gland connector as shown in Figure 14. Ensure that the brass gland is properly bonded to the steel enclosure once the lock nuts have been tightened. Install multiconductor cables following all It is assumed that with a multi-conductor cable that all of the phase conductors and the grounded conductor( if there is one) are all in the cable and there will be no inductive heating where the cable passes through a ferrous enclosure. If you have single conductor cables, there will be inductive heating if the cables pass though a ferrous enclosure. You would remove the ferrous material, install the brass plate and pass all of the single conductor cables through the brass plate to prevent the inductive heating.

The MI cable that I've installed was #2/0 solid copper. If that were in a multiconductor cable you wouldn't be able to install it.

Brass plate photo from Google:

Egads! I don't want to think what all that cable cost per foot.

The MI cable that I've installed was #2/0 solid copper. If that were in a multiconductor cable you wouldn't be able to install it.

...

The multiconductor MI cable that I've seen had only a single copper jacket around two conductors embedded in one mineral-based insulating fill. Had to ray-chem insulate the conductors after stripping off the mineral insulation, inside the panel enclosure.

The multiconductor MI cable that I've seen had only a single copper jacket around two conductors embedded in one mineral-based insulating fill. Had to ray-chem insulate the conductors after stripping off the mineral insulation, inside the panel enclosure.

I think his point was 2/0 multi-conductor would be too hard to bend.


I have installed 10/4 MI cable and that was a chore to do.

The MI cable that I've installed was #2/0 solid copper. If that were in a multiconductor cable you wouldn't be able to install it.

Brass plate photo from Google:

A photo I took about 10 years ago.

I will post the rest.

What is the benefit to MI cable rather than say emt or another wiring method?

What very little that I know is its durability. It is like a fire pump, for mission critical applications it is supposed to survive a fire and still deliver power to its destination.

What is the benefit to MI cable rather than say emt or another wiring method?

Its very fire resistant.

I believe it is listed for 2 hours in a flame without shorting or failing.

The inorganic construction of mineral insulated cable makes it extremely fire and heat resistant. With an operating limit equal to the melting point of copper, ?F, ?C - it can easily withstand high temperatures and heavy current overloads. It emits no smoke or toxic substances and allows no flame propagation. In contrast, a third party test proved standard conduit and wire failed at 425?F. These fireproof properties make it the best choice for connecting motor operated valves, control stations, plant shutdown systems, instruments and power devices that must remain operational under actual fire conditions.

http://www.micable.com/mic05.html

What very little that I know is its durability. It is like a fire pump, for mission critical applications it is supposed to survive a fire and still deliver power to its destination.

In some of the posted pictures you can see the label stating "two hour fire resistant".
I guess that even if the copper tube softens the mineral insulation will still protect the wires to some extent.

Tapatalk!

Augie, That is an interesting read. How flexible is the MI cable ? Comparable to 1/2" soft copper water pipe ? Do you use any special benders or is it just armstrong adjusted to fit ?

For flexibility, I think it's more like ACR, the stuff you use for refrigerator water lines.