Shanghai copper rose and fell on Thursday, and the intraday market pared its gains. It closed slightly lower in late trading. The main monthly 2210 contract opened at 62,290 yuan / ton, and closed at 62,430 yuan / ton in daily trading, down 120 yuan / ton
Flame retardant cable refers to the cable in which the sample is burned under the specified test conditions, after the test fire source is removed, the spread of the flame is only within a limited range
However, it should be noted that there is a limit in the burning time, and it is not possible to burn for a long time; the main function of fire-resistant cables is to use the power supply lines and control lines of emergency facilities such as fire-fight
VV cable jacket is thermoplastic material, VV cable (VLV) type cable conductor is rated to operate at a maximum temperature of 70 degrees Celsius, and the maximum temperature during short circuit (duration less than 5 seconds) does not exceed 160 degrees
In the case of wire and cable fire, the flame retardant cable can limit the combustion to a local range and extinguish it within a certain period of time without spreading, protecting other various equipment and avoiding greater losses.
Including the characteristics of some materials (such as hardness, creep of metal materials, compatibility of polymer materials) and some special use characteristics of products (such as non-flammability, atomic radiation resistance, insect bite, delayed