Fire-proof plugging measures for power supply lines of fire-fighting electrical equipment Fire prevention and blocking measures should be taken under the following circumstances: 1.Travel through different fire zones. 2.Vertical laying along the shaft through the floor. 3.The pipeline goes in and out of the shaft. 4.Cable tunnel, cable trench, partition between cables. 5.Crossing the exterior wall of the building. 6.To the entrance of the building, the channel entrance of the distribution room and the control room. 7.The cable is directed to the opening part of the distribution box, cabinet or control panel or platform.