Features of mineral fireproof cable
What are the characteristics of mineral fire-resistant cables? I have made a brief introduction to this problem before, but found that there are still many customers who do not understand.
What are the characteristics of mineral fire-resistant cables? I have made a brief introduction to this problem before, but found that there are still many customers who do not understand. Take this opportunity to explain it to you today.
Mineral fireproof cables are the most widely used equipment at present. It plays a very important role in application. In fact, the service life of the mineral fireproof cable can reach a hundred years; and it does not burn, does not support combustion, does not release toxic gases, and has zero combustion energy during operation. Especially when the load is large. Of course, the main mineral fireproof cable can reach 250 ℃ in normal use temperature. In addition, it is stipulated that the continuous working temperature of mineral insulated cables is 105 ℃, which takes into account the terminal sealing material and safety requirements. So even so, you will find that the cutoff is far more than other cables, because magnesium oxide powder has a better conductivity coefficient than plastic. Therefore, when using it, it is necessary to understand that at the same working temperature, the cut-off flow is larger, for lines above 16mm. Therefore, one section can be lowered, and two sections can be lowered where no human contact is allowed.
The characteristics of mineral fireproof cable Fireproof performance. Since it is made of inorganic substances during manufacture, it will not cause fire, nor can it burn or support combustion, and it will not produce toxic gases. So even if there is an external flame burning, the cable can still work normally. And after the fire is cleared, the cable does not need to be replaced, which is a real fireproof cable. Therefore, it provides a foolproof guarantee for the fire protection circuit, and has passed the test of the International Electrotechnical Commission IEC331. When purchasing mineral fire-resistant cables, it is necessary to understand that those with a cross-section of more than 25 square meters are single-core, so the current carrying capacity of the cable is larger than that of ordinary cables, and this is also obtained from the simulation of the characteristics of the physical cable. As a conclusion, at the same time, the copper sheath can be used directly for the ground wire.