Wires and natural gas pipes buried in the same trunking have no effect
Calculate the control cable generally do not need to calculate the cable termination head, his section is very small, no need to break the head. Control cable for industrial and mining enterprises, energy and transportation sector, for the exchange rated voltage 450/750 volts below the control, protection lines and other occasions, the use of PVC insulated, PVC sheathed control cable. Features DC resistance: 20 ℃, 0.4mm copper wire, less than or equal to 148Ω / km, 0.5mm copper wire, less than or equal to 95Ω / km. 2. Insulation electrical strength: between the conductor 1min1kv not breakdown conductor and shield 1min3kv not breakdown 3. Insulation resistance: each core and the other core ground, control cable greater than MΩ.km, HYAT cable greater than 3000MΩ.km. 4. Working capacitance: average 52 ± 2nF / km5. Far-end crosstalk defense: 150kHZ when the combination of the specified power average greater than 69dB / km.
The quota is based on 3-core standard, 4-core is not converted, 5-core by 1.. each additional one core to increase 0.3. This quotation in the instructions there, the software "willing to change" can be achieved. According to the largest single-core cross-section count.
Generally do not seem to, his section is very small, do not need to break the head
