Secondary circuit control cable copper cable is not less than the number of millimeters
KVV and VV are as follows: KVV: PVC insulated sheathed control cable, laying in the room, cable trench, pipe and underground. VV: PVC insulated sheathed power cable, laying in the room, tunnels and pipes, the cable can not withstand mechanical external force. They are not significantly different.
What is the laying of the laying of living with iron pipe
3 multi-core cable with the main line and the protection of the ground wire conductor, cross-section should not be less than 4mm2.3.7.11 AC power supply circuit by a number of cables in parallel composition, the cable should be equal, and should be used the same Material, the same cross-section of the conductor; with a metal sleeve of the cable, metal and structural cross-section should be the same. 3.7.12 Power cable The effective cross-section of the metal shield shall meet the maximum permissible temperature maximum temperature under the effect of possible short-circuit currents without exceeding the maximum short-circuit permissible insulation temperature.
