RTTZ/YTTW copper core mica tape mineral insulated corrugated copper sheathed power cable
This cable is a new type of fire-resistant cable that has been improved on the basis of the drawbacks of mineral insulated cables (BTTZ type). It can overcome the drawbacks of limited production length of mineral insulated cables and avoid the problem of intermediate joints during installation and laying. It has advantages such as less moisture in the insulation layer and convenient installation and laying. With the continuous promotion of this product, its excellent performance is increasingly recognized by customers, It has been widely used in basic industry and civil construction. Suitable for power supply circuits of fire protection systems, densely populated places such as large shopping malls, hospitals, subways, etc. that require high fire resistance performance.
Executive standards：JG/T 313
rated voltage：1kV
1) According to national standards, the fire resistance test method for wires and cables is GB/T 19216.21-2003. The flame temperature is 950 ℃~1000 ℃, the combustion time is 180 minutes, and the circuit is kept intact.
2) According to the British BS6378 standard (cable outer diameter ≤ 20mm), the cable can meet the following requirements:
Pure fire resistance level C: 950 ℃ for 180 minutes; Fire resistant water grade W: 650 ℃ for 15min; Fire resistance and mechanical vibration level Z: 950 ℃ for 15 minutes.
3) According to the British BS8491 standard (cable outer diameter>20mm), the cable can meet the following requirements:
The fire resistance test shall be conducted at 850 ℃ for 120min, with mechanical shock every 10min. Water shall be sprayed every 5min at the end of the test, with water sprayed every 1min for 5s, and a total of 5 times (fire supply+mechanical shock+water spraying)
4) Recommended allowable bending radius for cables:
