Electrical engineering bridge; two sets of cable bridge in the same height parallel laying, during which the net distance should be at least the number of centimeters. Thank you hurry
Please refer to GB electrical installation installation cable construction and acceptance specifications 5.3 cable duct laying 5.3.1 in the following locations, the cable should have a certain mechanical strength of the protective tube or the installation of protective cover: 1 cable into the buildings, tunnels, Through the floor and the walls. 2 from the channel lead to the poles, equipment, wall surface or house pedestrians easy to close, from the ground height of 2m below a section. 3 may have a gear that has been above the cable section; 4 other places that may be subject to mechanical damage. 5.3.2 There should be no water inside the pipeline and no clogging. When wearing the cable, do not damage the protective layer, can be used non-corrosive lubricant (powder). 5.3.3 cable laying in the laying of cables, should be clear, remove debris. 5.3.4 The number of cables in the pipe should meet the design requirements; AC single-core cable shall not penetrate the steel pipe alone. 5.3 Laying of cables in cable ducts 5.3.1 In the following locations, the cable shall have a protective tube of mechanical strength or a protective cover: 1 cable into the building, tunnel, through the floor and the wall. 2 from the channel lead to the poles, equipment, wall surface or house pedestrians easy to close, from the ground height of 2m below a section. 3 may have a gear that has been above the cable section; 4 other places that may be subject to mechanical damage. 5.3.2 There should be no water inside the pipeline and no clogging. When wearing the cable, do not damage the protective layer, can be used non-corrosive lubricant (powder). 5.3.3 cable laying in the laying of cables, should be clear, remove debris. 5.3.4 The number of cables in the pipe should meet the design requirements; AC single-core cable shall not penetrate the steel pipe alone.
A large number of removal sets to repair the quota, a small amount of sets of installation quotas, artificial and mechanical costs multiplied by 0.. auxiliary materials, in the fixed machine tool to delete.
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