On the cable should not be a large number of fire-retardant paint brushing way fire but should be a large number of letters, blocking compartment way. In the use of closure, blocking, and compartment mode, should pay attention to the following questions:
1. With the closure, blocking, separated approach, to be able to ensure that a single cable does not extend the fire to the ignition of multiple cables. Control cables should be fully fire-resistant or flame-retardant cables should be used to ensure that the main equipment in any emergency situation can be safely stopped running.
2. Must ensure that the fire blocking tightness, thickness. Fire blocking is not close to the loss of the sealing effect, especially in the cable where the concentration of the best use of soft block material to ensure strict closure. Maintenance inspection, the destruction of the closure should be promptly restored. Blocking material thickness is not enough, the cable fire after the fire will pass through the plugging material of the series extension combustion.
3. Fire blocking layer should have sufficient mechanical strength. Because the cable fire in particular the occurrence of electrical short-circuit, will cause the rapid expansion of the air and produce a certain momentum, destruction.
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